Toyota Scion XA 2006 User Manual

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM		AX–3
	DEFINITION OF TERMS
Term	Definition
Monitor description	Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details).
Related DTCs	Diagnostic code.
	Preconditions that allow the ECM to detect malfunctions.
Typical enabling condition	With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the
	malfunction threshold(s).
	The priority order that is applied to monitoring if multiple sensors and components are used to detect the
Sequence of operation	malfunction.
	While another sensor is being monitored, the next sensor or component will not be monitored.
Required sensor/components	The sensors and components that are used by the ECM to detect malfunctions.
	The number of times that the ECM checks for malfunctions per driving cycle.
Frequency of operation	"Once per driving cycle" means that the ECM detects malfunction only 1 time during a single driving cycle.
	"Continuous" means that the ECM detects a malfunction every time the enabling condition is met.

Duration

Malfunction thresholds

MIL operation

Component operating range

The minimum time that the ECM must sense a continuous deviation in the monitored value(s) before setting a DTC. This timing begins after the "typical enabling conditions" are met.

Beyond this value, the ECM will conclude that there is a malfunction and set a DTC.

MIL illumination timing after a defect is detected.

"Immediate" means that the ECM illuminates the MIL the instant the ECM determines that there is a malfunction.

"2 driving cycle" means that the ECM illuminates the MIL if the same malfunction is detected again in the 2nd driving cycle.

Normal operation range of sensors and solenoids under normal driving conditions. Use these ranges as a reference.

They cannot be used to judge if a sensor or solenoid is defective or not.

AX

AX–4	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

PART AND SYSTEM NAME LIST

This reference list indicates the part and system names used
in this manual along with their definitions.
Part and System Name	Definition
Accel position sensor	Accelerator pedal position sensor
AFS	Air fuel ratio sensor
ATF temperature sensor, Trans. fluid temp. sensor, ATF temperature	Transmission fluid temperature sensor
sensor "A"
Camshaft timing oil control valve, Oil control valve OCV, VVT, VSV	Camshaft timing oil control valve
Charcoal canister	Evaporative emissions canister
Crankshaft position sensor "A"	Crankshaft position sensor
Electronic controlled automatic transmission, ECT	Electronically controlled automatic transmission
Electronic throttle control system, Throttle actuator control system	Electronic throttle control system
Engine immobiliser system, Immobiliser system	Vehicle anti-theft system
Engine speed sensor	Crankshaft position sensor
FC idle	Deceleration fuel cut
Idle air control valve	Idle speed control
Input speed sensor, Input turbine speed sensor "A", Speed sensor	Input turbine speed sensor
(NT), Turbine speed sensor
Intake manifold runner control	Intake manifold tuning system
Intake manifold runner valve, IMRV, IACV (runner valve)	Intake manifold tuning valve
Intermediate shaft speed sensor "A"	Counter gear speed sensor
Internal control module, Control module, Engine control ECU, PCM	Power train control module
Knock control module	Engine knock control module
Knock sensor	Engine knock sensor
Mass or volume air flow circuit	Mass air flow sensor circuit
O2 sensor	Heater oxygen sensor
ORVR system	On-board refueling vapor recovery system
AX Output speed sensor	Output shaft speed sensor
Oxygen sensor pumping current circuit	Oxygen sensor output signal
Oxygen sensor reference ground circuit	Oxygen sensor signal ground
PNP switch, NSW	Park/Neutral position switch
Pressure control solenoid	Transmission pressure control solenoid
PS pressure switch	Power steering pressure switch
Shift solenoid	Transmission shift solenoid valve
Speed sensor, Vehicle speed sensor "A", Speed sensor for skid	Vehicle speed sensor
control ECU
THA	Intake air temperature
Throttle actuator control motor, Actuator control motor, Electronic	Electronic throttle actuator
throttle motor, Throttle control motor
Throttle/pedal position sensor, Throttle/pedal position switch, Throttle	Throttle position sensor
position sensor/switch
Toyota HCAC system, Hydrocarbon adsorptive Catalyst (HCAC)	HC adsorptive three-way catalytic converter
system, HC adsorptive three-way catalyst
Transmission control switch, Shift lock control unit	Shift lock control module
Turbo pressure sensor	Turbocharger pressure sensor
Vacuum sensor	Manifold air pressure sensor
Vapor pressure sensor, EVAP pressure sensor, Evaporative emission	Fuel tank pressure sensor
control system pressure sensor
Variable timing and lift, VVTL	Camshaft timing and lift control
Variable valve timing sensor, VVT sensor	Camshaft position sensor
Variable valve timing system, VVT system	Camshaft timing control system

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM		AX–5
Part and System Name	Definition
VSV for ACM	Active control engine mount
VSV for CCV, VSV for canister close valve	Evaporative emissions canister vent valve
VSV for EVAP, No. 1 vacuum switching valve assembly, EVAP VSV,	Evaporative emissions canister purge valve
Purge VSV
VSV for intake control	Intake manifold tuning solenoid valve
VSV for pressure switching valve, By-pass VSV	Evaporative emission pressure switching valve
VSV for turbo	Turbocharger pressure control solenoid valve

AX

AX–6	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

PARTS LOCATION

COMBINATION METER ASSEMBLY - MIL

ECM

AX

DLC3

STOP LIGHT SWITCH

TRANSMISSION CONTROL SWITCH (O/D MAIN SWITCH)

C118359E02

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–7

SPEED SENSOR NT

ATF TEMPERATURE SENSOR

SHIFT SOLENOID VALVE SL

PARK / NEUTRAL POSITION

SWITCH

AX

SHIFT SOLENOID VALVE SLT

SHIFT SOLENOID VALVE S2

SHIFT SOLENOID VALVE ST

SHIFT SOLENOID VALVE S1

C118360E01

AX–8	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

SYSTEM DIAGRAM

The configuration of the electronic control system in the

U340E automatic transaxle is as shown in the following chart.

	Crankshaft Position Sensor	NE	S1
				Shift Solenoid Valve S1
	Ignition Switch	NSW
			S2	Shift Solenoid Valve S2
	Engine Coolant Temperature	THW
	(ECT) Sensor
			ST	Shift Solenoid Valve ST
		VTA1,
	Throttle Position Sensor	VC
			ECM
AX		STA	SLT	Shift Solenoid Valve SLT
	Park/Neutral Position Switch
		R, D,
		2, L
	Speed Sensor		SL
				Shift Solenoid Valve SL
	Skid Control ECU
			ODLP	O/D OFF Indicator Light
		SPD
	Combination Meter
				C121851E01

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–9

O/D Main Switch	ODMS
		Malfunction Indicator Lamp
	W	(MIL)
Speed Sensor NT	NT
	ECM
Stop Light Switch	STP
	TC	Data Link Connector 3 (DLC3)
ATF Temperature Sensor	THO1	AX
		C119155E01

AX–10	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

			ECM		Combination Meter
	EFI			SPD
			+B		DLC3
			MREL	TC	TC
				CANH	CANH
				CANL	CANL
			BATT	NSW
					Park/Neutral Position Switch
EFI	Ignition Switch			STA	L	B
	AM2		IGSW
	AM2	IG2		L	PL
AX				2	2L
MAIN						RB
				D	DL
				R	RL
					GAUGE
						C121562E01

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–11

		ECM
ECT Solenoid
Shift Solenoid Valve S1
	S1	S1
Shift Solenoid Valve S2			Stop Light Switch
			STOP
		S2
	S2		STP
Shift Solenoid Valve ST
	ST	ST
Shift Solenoid Valve SL
	SL	SL	NT+
			Speed Sensor NT
			NT-
Shift Solenoid	SLT+	SLT+	AX
Valve SLT
	SLT-	SLT-
ATF Temperature Sensor
E2	THO	THO1	E1
		E2
			C119157E01

AX–34	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

6.CHECK MIL

(a)Check that the MIL illuminates when turning the ignition switch ON.

If the MIL does not illuminate, there is a problem in the MIL circuit (see page ES-321).

(b)When the engine is started, the MIL should turn off.

7.ALL READINESS

(a)For this vehicle, using the intelligent tester allows readiness codes corresponding to all DTCs to be read. When the diagnosis (normal or malfunctioning) has been completed, readiness codes are set. Enter the following menus: ENHANCED OBD II / MONITOR STATUS on the intelligent tester.

	DTC CHECK / CLEAR
	1.	CHECK DTC
		(a) DTCs which are stored in the ECM can be displayed
		on the intelligent tester.
		The intelligent tester can display pending DTCs and
		current DTCs. Some DTCs are not stored unless a
		malfunction is detected in consecutive driving
		cycles. When a malfunction is detected in only one
		driving cycle, it is stored as a pending DTC.
		(1) Connect the intelligent tester to the CAN VIM.
DLC3	Intelligent Tester	Then connect the CAN VIM to the DLC3.
		(2) Turn the ignition switch ON.
	CAN VIM	(3) Enter the following menus: DIAGNOSIS /
		ENHANCED OBD II / DTC INFO / CURRENT
	A119252E05	CODES (or PENDING CODE).
AX		(4) Confirm the DTCs and freeze frame data and
		then write them down.
		(5) Confirm the details of the DTCs (see page AX-
		36).
		NOTICE:
		When simulating a symptom with the scan
		tool to check for DTCs, use normal mode.
		For codes on the DIAGNOSTIC TROUBLE
		CODE CHART subject to "2 trip detection
		logic", perform the following actions.
		Turn the ignition switch OFF after the
		symptom is simulated once. Then repeat the
		simulation process again. When the
		symptom has been simulated twice, the MIL
		illuminates and the DTCs are recorded in the
		ECM.

2.CLEAR DTC

(a)When using the intelligent tester:

(1)Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.

(2)Turn the ignition switch ON.

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–35

(3)Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR CODES. Then press YES.

HINT:

When operating the intelligent tester to erase the codes, the DTCs and freeze frame data will be erased.

(b) When not using the intelligent tester:

(1)Disconnect the battery terminal or remove the EFI fuse from the engine room junction block for 60 seconds or more. If you disconnect the

battery terminal, perform the "INITIALIZATION" procedure (see page AX-19).

EFI Fuse

A107789E01

AX

AX–36	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

CHECK MODE PROCEDURE

1.DESCRIPTION

(a)Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1 trip detection logic.

	2.	CHECK MODE PROCEDURE
		(a) Make sure that the following conditions are met:
		(1)	Battery positive voltage 11 V or more
		(2)	Throttle valve fully closed
		(3)	Transaxle in the P or N position
		(4)	A/C OFF
		(b) Turn the ignition switch OFF.
		(c) Connect the intelligent tester to the CAN VIM. Then
		connect the CAN VIM to the DLC3.
		(d) Turn the ignition switch ON.
		(e) Enter the following menus: DIAGNOSIS /
DLC3	Intelligent Tester	ENHANCED OBD II / CHECK MODE.
	CAN VIM
	A119252E05

ON

AX

OFF

0.13 seconds

0.13 seconds

A076900E02

(f)Change the ECM to check mode. Make sure the MIL flashes as shown in the illustration.

NOTICE:

All DTCs and freeze frame data recorded will be erased if: 1) the intelligent tester is used to change the ECM from normal mode to check mode or vice versa; or 2) during check mode, the ignition switch is turned from ON to ACC or OFF.

Before changing to check mode, make notes of the DTCs and freeze frame data.

(g)Start the engine. The MIL should turn off after the engine starts.

(h)Perform "MONITOR DRIVE PATTERN" for the ECT test (see page AX-21).

(Or, simulate the conditions of the malfunction described by the customer.)

(i)After simulating the malfunction conditions, use the intelligent tester to check the DTC and freeze frame data.

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–37

FAIL-SAFE CHART

1.FAIL-SAFE CHART

This function minimizes the loss of the ECT functions when any malfunction occurs in a sensor or solenoid.

(a)Vehicle speed signal (SPD):

When there are problems with vehicle speed signals, O/D up-shift is prohibited.

(b)Speed sensor (NT):

When the input turbine speed sensor has a malfunction, O/D up-shift is prohibited.

(c)Automatic Transmission Fluid (ATF) temperature sensor:

When the ATF temperature sensor has a malfunction, O/D up-shift is prohibited.

(d)Shift solenoid valve SL:

If the ECM detects a malfunction in the solenoid valve SL, it turns the valve OFF.

(e)Shift solenoid valve SLT:

When the solenoid valve SLT has a malfunction, O/ D up-shift is prohibited.

(f)Engine Coolant Temperature (ECT) sensor: When the ECT sensor has a malfunction, O/D upshift is prohibited.

(g)Knock sensor:

When the knock sensor has a malfunction, O/D upshift is prohibited.

(h)Throttle position sensor:

When the throttle position sensor has a malfunction,

O/D up-shift is prohibited.
(i) Shift solenoid valve S1 and S2:	AX
Fail-safe function:
If either of the shift solenoid valve circuits develops
an open or short, the ECM turns the other shift
solenoid "ON" and "OFF" in order to shift into the
gear positions shown in the table below.
The ECM also turns the shift solenoid valve ST OFF
at the same time. If both solenoids malfunction,
hydraulic control cannot be performed electronically
and must be done manually.
Manual shifting as shown in the following table must
be done. In case of a short circuit, the ECM stops
sending the current to the short circuited solenoid.
Even if starting the engine in the fail-safe mode, the
gear position remains in the same position.

Position	Normal			Shift Solenoid Valve S1			Shift Solenoid Valve S2
				Malfunctioning			Malfunctioning
	Solenoid Valve		Gear	Solenoid Valve		Gear	Solenoid Valve		Gear
	S1	S2		S1	S2		S1	S2

Both Solenoid Valves

Malfunctioning

Gear when shift selector is manually operated

D	ON	ON	1st	X	ON	3rd	ON	X	2nd	3rd
					↓
					OFF
	ON	OFF	2nd	X	OFF	3rd	ON	X	2nd	3rd
	OFF	OFF	3rd	X	OFF	3rd	OFF	X	3rd	3rd
	OFF	ON	O/D	X	ON	O/D	OFF	X	3rd	3rd

AX–38

Position

2

L

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Normal			Shift Solenoid Valve S1			Shift Solenoid Valve S2
			Malfunctioning			Malfunctioning
Solenoid Valve		Gear	Solenoid Valve		Gear	Solenoid Valve		Gear
S1	S2		S1	S2		S1	S2

Both Solenoid Valves

Malfunctioning

Gear when shift selector is manually operated

ON	ON	1st	X	ON	3rd	ON	X	2nd	3rd
				↓
				OFF
ON	OFF	2nd	X	OFF	3rd	ON	X	2nd	3rd
OFF	OFF	3rd	X	OFF	3rd	OFF	X	3rd	3rd
ON	ON	1st	X	ON	3rd	ON	X	2nd	3rd
				↓
				OFF
ON	OFF	2nd	X	OFF	3rd	ON	X	2nd	3rd

HINT:

•X: OFF (the ECM stops sending current to a malfunctioning solenoid valve)

•↓: Condition in the electrical operation is shown above the "↓".

•↓: Condition in the fail-safe mode is shown below the "↓".

AX

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–1

	AUTOMATIC TRANSAXLE
	SYSTEM
	PRECAUTION
	NOTICE:
	• When disconnecting the cable from the negative (-)
	battery terminal, initialize the following system(s) after
	the cable is reconnected.
System Name	See procedure
Sliding Roof System	RF-4
	• Perform the RESET MEMORY procedure (A/T
	initialization) when replacing the automatic transaxle
	assembly, engine assembly or ECM (see page AX-19).
	HINT:
	RESET MEMORY cannot be completed by only reconnecting
	the cable to the negative (-) battery terminal.
	CAUTION:
	When using compressed air, always aim away from
	yourself to prevent Automatic Transmission Fluid (ATF)
	or kerosene from spraying on your face.
	NOTICE:
	• The automatic transaxle is composed of precision-
	made parts, necessitating careful inspection before
	reassembly because even a small nick could cause
	fluid leakage or affect performance.
	• The procedures are organized so that you work on
	only one component group at a time. This will help
	avoid confusion with similar-looking parts of different	AX
	sub-assemblies being on your workbench at the same
	time.
	• The component groups are inspected and repaired
	from the converter housing side.
	• Whenever possible, complete the inspection, repair
	and reassembly before proceeding to the next
	component group. If a defect is found in a certain
	component group during reassembly, inspect and
	repair this group immediately. If a component group
	cannot be assembled because parts are being
	ordered, be sure to keep all parts of the group in a
	separate container while proceeding with
	disassembly, inspection, repair and reassembly of
	other component groups.
	• Use of Toyota Genuine ATF T-IV is recommended.
	• All disassembled parts should be washed clean, and
	compressed air should be blown through any fluid
	passages and holes.
	• Dry all parts with compressed air. Never use cloth.
	• The recommended ATF or kerosene should be used
	for cleaning.
	• After cleaning, the parts should be arranged in the
	order they were removed for efficient inspection,
	repairs, and reassembly.

AX–2

AX

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

•When disassembling a valve body, be sue to match each valve with its corresponding spring.

•New discs for the brakes and clutches that will be used for replacement must be soaked in ATF for at least 15 minutes before reassembly.

•All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with ATF prior to reassembly.

•All old gaskets and rubber O-rings must be replaced.

•Do not apply adhesive cement to gaskets and similar parts.

•Make sure that the ends of the snap rings are not aligned with any cutouts. Also make sure that snap rings are correctly installed into the grooves.

•If a worn bushing is to be replaced, the sub-assembly containing the bushing must also be replaced.

•Check the thrust bearings and races for wear or damage. Replace if necessary.

•Use petroleum jelly to keep parts in place.

•When working with FIPG material, perform the following:

Using a razor blade and gasket scraper, remove all old FIPG material from the gasket surface.

Clean all components thoroughly to remove all foreign matter.

Clean both sealing surfaces with a non-residue solvent.

Apply FIPG material in a continuous line approximately 1 mm (0.04 in.) in diameter on the sealing surface.

Reassemble parts within 10 minutes of applying FIPG material. Failing to do so will require the FIPG material to be removed and reapplied.

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–39

DATA LIST / ACTIVE TEST

	1.	READ DATA LIST
		HINT:
		Using the intelligent tester's DATA LIST allows switch,
		sensor, actuator, and other item values to be read
		without removing any parts. Reading the DATA LIST
		early in troubleshooting is one way to save time.
		NOTICE:
		In the table below, the values listed under "Normal
		Condition" are reference values. Do not depend
		solely on these reference values when deciding
		whether a part is faulty or not.
		(a) Warm up the engine.
		(b) Turn the ignition switch OFF.
		(c) Connect the intelligent tester to the CAN VIM. Then
		connect the CAN VIM to the DLC3.
		(d) Turn the ignition switch ON.
		(e) Turn the intelligent tester ON.
		(f) Enter the following menus: DIAGNOSIS /
		ENHANCED OBD II / DATA LIST.
		(g) Follow the instructions on the tester and read the
		DATA LIST.
Item	Measurement Item/	Normal Condition	Diagnostic Note
	Range (Display)
STOP LIGHT SW	Stop light switch status/	• Brake pedal is depressed:	-
	ON or OFF	ON
		• Brake pedal is released: OFF
PNP SW (NSW)	PNP switch status/	Shift lever is:	When shift lever position
	ON or OFF	On P or N: ON	displayed on intelligent tester
		Not on P or N: OFF	differs from actual position,	AX
			adjustment of PNP switch or shift
			cable may be incorrect
			HINT:
			When failure still occurs even
			after adjusting these parts, see
			page AX-38
REVERSE	PNP switch status/	Shift lever is:	When shift lever position
	ON or OFF	On R: ON	displayed on intelligent tester
		Not on R: OFF	differs from actual position,
			adjustment of PNP switch or shift
			cable may be incorrect
			HINT:
			When failure still occurs even
			after adjusting these parts, see
			page AX-38
DRIVE	PNP switch status/	Shift lever is:	When shift lever position
	ON or OFF	On D: ON	displayed on intelligent tester
		Not on D: OFF	differs from actual position,
			adjustment of PNP switch or shift
			cable may be incorrect
			HINT:

When failure still occurs even after adjusting these parts, see page AX-38

AX–40	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Item	Measurement Item/	Normal Condition
	Range (Display)
2ND	PNP switch status/	Shift lever is:
	ON or OFF	On 2: ON
		Not on 2: OFF

LOW	PNP switch status/	Shift lever is:
	ON or OFF	On L: ON
		Not on L: OFF

SHIFT	ECM gear shift command/	Shift lever position is:
	1st, 2nd, 3rd or 4th (O/D)	•	On L: 1st
		• On 2: 1st or 2nd
		• On 3 (O/D OFF): 1st, 2nd or
			3rd
		• On D (O/D ON): 1st, 2nd, 3rd
			or 4th (O/D)
LOCK UP SOL	Lock-up solenoid status/	•	Lock-up: ON
	ON or OFF	• Not on lock-up: OFF
SOLENOID (SLT)	Shift solenoid SLT status/	•	Accelerator pedal is
	ON or OFF		depressed: OFF
		• Accelerator pedal is released:
			ON
OVERDRV CUT SW2	O/D switch status/	• Ignition switch ON: ON
	ON or OFF		↓
		• O/D switch pushed: OFF
AX			↓
		• O/D switch pushed: ON
AT FLUID TEMP	ATF temperature sensor value/	•	After stall test:
	Min.: -40 C (-40 F)		Approximately 80 C (176 F)
	Max.: 215 C (419 F)	• Equal to ambient temperature
			during cold soak

Diagnostic Note

When shift lever position displayed on intelligent tester differs from actual position, adjustment of PNP switch or shift cable may be incorrect

HINT:

When failure still occurs even after adjusting these parts, see page AX-38

When shift lever position displayed on intelligent tester differs from actual position, adjustment of PNP switch or shift cable may be incorrect

HINT:

When failure still occurs even after adjusting these parts, see page AX-38

-

-

-

-

If value is -40 C (-40 F) or 215 C (419 F), ATF temperature sensor circuit is opened or short circuited

2.PERFORM ACTIVE TEST

HINT:

Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. The DATA LIST can be displayed during the ACTIVE TEST.

(a)Warm up the engine.

(b)Turn the ignition switch OFF.

(c)Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.

(d)Turn the ignition switch ON.

(e)Turn the tester ON.

(f)Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.

	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM			AX–41
		(g) Perform the ACTIVE TEST.
Item	Test Details		Diagnostic Note
SHIFT	[Test Details]		Possible to check operation of shift
	Operate shift solenoid valve and set each shift lever position by		solenoid valves
	yourself
	[Vehicle Condition]
	50 km/h (31 mph) or less
	[Other information]
	• Press " " button: Shift up
	• Press " " button: Shift down
LOCK UP	[Test Details]		Possible to check shift solenoid SL
	Control shift solenoid SL to set automatic transaxle to the lock-up		operation
	condition
	[Vehicle Condition]
	Vehicle speed: 58 km/h (36 mph) or more
TIMING SOL	[Test Details]		Possible to check shift solenoid ST
	Operate shift solenoid ST		operation
	[Vehicle Condition]
	•	Vehicle stopped
	•	IDL: ON
LINE PRESS UP*	[Test Details]		-
	Operate shift solenoid SLT and raise line pressure
	[Vehicle Condition]
	•	Vehicle stopped
	•	IDL: ON

HINT:

OFF: Line pressure up

ON: No action (normal operation)

HINT:

*: LINE PRESS UP in the ACTIVE TEST is performed to check the line pressure changes by connecting SST to the automatic transaxle, which is used in the HYDRAULIC TEST (see page AX-18) as well. Please note that the pressure values in the

ACTIVE TEST and HYDRAULIC TEST are AX different.

AX–42	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
		DIAGNOSTIC TROUBLE CODE CHART
DTC No.	Detection Item	Trouble Area	MIL*1	Memory*2	See page
P0705	Transmission Range	- Short in park/neutral	Comes on	DTC stored	AX-38
	Sensor Circuit	position switch circuit
	Malfunction (PRNDL	- Park/Neutral
	Input)	position switch
		- ECM
P0710	Transmission Fluid	- Open or short in	Comes on	DTC stored	AX-42
	Temperature Sensor	ATF temperature
	"A" Circuit	sensor circuit
		- ATF temperature
		sensor
		- ECM
P0711	Transmission Fluid	- Transaxle fluid level	Comes on	DTC stored	AX-45
	Temperature Sensor	- ATF temperature
	"A" Performance	sensor
		- ECM
P0712	Transmission Fluid	- Short in ATF	Comes on	DTC stored	AX-42
	Temperature Sensor	temperature sensor
	"A" Circuit Low Input	circuit
		- ATF temperature
		sensor
		- ECM
P0713	Transmission Fluid	- Open in ATF	Comes on	DTC stored	AX-42
	Temperature Sensor	temperature sensor
	"A" Circuit High Input	circuit
		- ATF temperature
		sensor
		- ECM
P0717	Input Speed Sensor	- Open or short in	Comes on	DTC stored	AX-48
	Circuit No Signal	speed sensor NT
		circuit
		- Speed sensor NT
AX		- ECM
		- Automatic transaxle
		(clutch, brake, gear,
		etc.)
P0724	Brake Switch "B"	- Short in stop light	Comes on	DTC stored	AX-51
	Circuit High	switch circuit
		- Stop light switch
		- ECM
P0741	Torque Converter	- Shift solenoid valve	Comes on	DTC stored	AX-54
	Clutch Solenoid	SL remains open or
	Performance (Shift	closed
	Solenoid Valve SL)	- Valve body is
		blocked
		- Shift solenoid valve
		SL
		- Torque converter
		clutch
		- Automatic transaxle
		(clutch, brake, gear,
		etc.)
		- ECM
P0751	Shift Solenoid "A"	- Shift solenoid valve	Comes on	DTC stored	AX-57
	Performance (Shift	S1 remains open or
	Solenoid Valve S1)	closed
		- Valve body is
		blocked

- Shift solenoid valve S1

- Automatic transaxle (clutch, brake, gear, etc.)

- ECM

	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM				AX–43
DTC No.	Detection Item	Trouble Area	MIL*1	Memory*2	See page
P0756	Shift Solenoid "B"	- Shift solenoid valve	Comes on	DTC stored	AX-60
	Performance (Shift	S2 remains open or
	Solenoid Valve S2)	closed
		- Valve body is
		blocked
		- Shift solenoid valve
		S2
		- Automatic transaxle
		(clutch, brake, gear,
		etc.)
		- ECM
P0787	Shift / Timing	- Short in shift	Comes on	DTC stored	AX-63
	Solenoid Low (Shift	solenoid valve ST
	Solenoid Valve ST)	circuit
		- Shift solenoid valve
		ST
		- ECM
P0788	Shift / Timing	- Open in shift	Comes on	DTC stored	AX-63
	Solenoid High (Shift	solenoid valve ST
	Solenoid Valve ST)	circuit
		- Shift solenoid valve
		ST
		- ECM
P0973	Shift Solenoid "A"	- Short in shift	Comes on	DTC stored	AX-66
	Control Circuit Low	solenoid valve S1
	(Shift Solenoid Valve	circuit
	S1)	- Shift solenoid valve
		S1
		- ECM
P0974	Shift Solenoid "A"	- Open in shift	Comes on	DTC stored	AX-66
	Control Circuit High	solenoid valve S1
	(Shift Solenoid Valve	circuit
	S1)	- Shift solenoid valve
		S1
		- ECM
P0976	Shift Solenoid "B"	- Short in shift	Comes on	DTC stored	AX-70	AX
	Control Circuit Low	solenoid valve S2
	(Shift Solenoid Valve	circuit
	S2)	- Shift solenoid valve
		S2
		- ECM
P0977	Shift Solenoid "B"	- Open in shift	Comes on	DTC stored	AX-70
	Control Circuit High	solenoid valve S2
	(Shift Solenoid Valve	circuit
	S2)	- Shift solenoid valve
		S2
		- ECM
P2716	Pressure Control	- Open or short in	Comes on	DTC stored	AX-73
	Solenoid "D"	shift solenoid valve
	Electrical (Shift	SLT circuit
	Solenoid Valve SLT)	- Shift solenoid valve
		SLT
		- ECM
P2769	Short in Torque	- Short in shift	Comes on	DTC stored	AX-77
	Converter Clutch	solenoid valve SL
	Solenoid Circuit (Shift	circuit
	Solenoid Valve SL)	- Shift solenoid valve
		SL
		- ECM
P2770	Open in Torque	- Open in shift	Comes on	DTC stored	AX-77
	Converter Clutch	solenoid valve SL
	Solenoid Circuit (Shift	circuit
	Solenoid Valve SL)	- Shift solenoid valve
		SL
		- ECM

	AX–44	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
	DTC	P0705	Transmission Range Sensor Circuit Malfunc-
			tion (PRNDL Input)

DESCRIPTION

The park/neutral position switch detects the shift lever position and sends signals to the ECM.

DTC No.	DTC Detection Condition	Trouble Area
P0705	2 or more switches are ON simultaneously for P (NSW),	• Short in park/neutral position switch circuit
	R, N (NSW), D, 2 and L positions (2 trip detection logic)	•	park/neutral position switch
		•	ECM

MONITOR DESCRIPTION

These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/ neutral position switch circuit.

The park/neutral position switch detects the shift lever position and sends a signal to the ECM.

For security, the park/neutral position switch detects the shift lever position so that the engine can be started only when the shift lever is on P or N.

The park/neutral position switch sends a signal to the ECM according to the shift lever position (R, D, 2 or L).

The ECM determines that there is a problem with the switch or related parts if it receives more than 1 position signal simultaneously. The ECM will illuminate the MIL and store the DTC.

MONITOR STRATEGY

Related DTCs	P0705: Park/Neutral position switch/Verify switch input
Required sensors/Components	Park/Neutral position switch
Frequency of operation	Continuous
Duration	2 sec.
MIL operation	2 driving cycles
AX Sequence of operation	None
TYPICAL ENABLING CONDITIONS
The monitor will run whenever this DTC is not present.	None
The typical enabling condition is not available	-
TYPICAL MALFUNCTION THRESHOLDS
When either condition below is met:	A or B
A. Number of the following signal inputs at the same time	2 or more
Park/Neutral position switch	ON
R switch	ON
D switch	ON
2 switch	ON
L switch	ON
B. All of the following conditions are met:	-
Park/Neutral position switch	OFF
R switch	OFF
D switch	OFF
2 switch	OFF
L switch	OFF

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–45

COMPONENT OPERATING RANGE

Park/Neutral position switch Park/Neutral position switch sends only one signal to the ECM.

WIRING DIAGRAM

ECM

NSW

Park/Neutral Position Switch

From Battery

From Battery

B	L	STA
	LL	L
	2L	2
	DL	D
RB	NL
	RL	R
	PL

Combination Meter

AX

C119158E01

AX–46		U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
INSPECTION PROCEDURE
1 INSPECT PARK/NEUTRAL POSITION SWITCH
				(a) Disconnect the P1 park/neutral position switch
B	2L	RB	RL		connector.
				(b) Measure the resistance of the park/neutral position
					switch when the shift lever is moved to each position.
					Standard resistance
				Tester Connection		Shift Lever Position	Specified Condition
				2	(RB) - 6 (PL) and 4 (B)	P	Below 1
				- 5 (L)
NL	LL	DL	PL L	2 (RB) - 6 (PL) and 4 (B)		Not on P	10 k or higher
			G026080E18	- 5 (L)
				1	(RL) - 2 (RB)	R	Below 1
				1	(RL) - 2 (RB)	Not on R	10 k or higher
				2	(RB) - 9 (NL) and 4 (B)	N	Below 1
				- 5 (L)
				2	(RB) - 9 (NL) and 4 (B)	Not on N	10 k or higher
				- 5 (L)
				2	(RB) - 7 (DL)	D	Below 1
				2	(RB) - 7 (DL)	Not on D	10 k or higher
				2	(RB) - 3 (2L)	2	Below 1
				2	(RB) - 3 (2L)	Not on 2	10 k or higher
				2	(RB) - 8 (LL)	L	Below 1
				2	(RB) - 8 (LL)	Not on L	10 k or higher

NG	REPLACE PARK/NEUTRAL POSITION
AX	SWITCH
OK

2 CHECK WIRE HARNESS (PARK/NEUTRAL POSITION SWITCH - BATTERY)

	E5	E6
	2 (+)	L (+)
R (+)	D (+)	NSW
		C118533E03

(a)Turn the ignition switch ON.

(b)Measure the voltage of the wire harness side connectors.

Standard voltage

Tester Connection		Shift Lever Position	Specified Condition
E6-30 (NSW) - Body		P or N	Below 1 V
ground
E6-30 (NSW) - Body		Not on P or N	10 to 14 V
ground
E5-11 (R) - Body ground		R	10 to 14	V*
E5-11 (R) - Body ground		Not on R	Below 1 V
E5-21	(D) - Body ground	D or 3	10 to 14	V
E5-21	(D) - Body ground	Not on D or 3	Below 1 V
E5-10	(2) - Body ground	2	10 to 14	V
E5-10	(2) - Body ground	Not on 2	Below 1 V
E5-9 (L) - Body ground		L	10 to 14	V
E5-9 (L) - Body ground		Not on L	Below 1 V

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–47

HINT:

*: The voltage will drop slightly due to the illumination of the back-up light.

NG	REPAIR OR REPLACE HARNESS AND
	CONNECTOR

OK

REPLACE ECM

AX

	AX–48	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
	DTC	P0710	Transmission Fluid Temperature Sensor "A"
			Circuit
	DTC	P0712	Transmission Fluid Temperature Sensor "A"
			Circuit Low Input
	DTC	P0713	Transmission Fluid Temperature Sensor "A"
			Circuit High Input

DESCRIPTION

The Automatic Transmission Fluid (ATF) temperature sensor converts the ATF temperature into a resistance value which is input into the ECM.

The ECM applies a voltage to the temperature sensor through ECM terminal THO1. The sensor resistance changes with the ATF temperature.

One terminal of the sensor is grounded so that the sensor resistance and voltage decrease as the temperature becomes higher.

The ECM calculates the ATF based on the voltage signal.

DTC No.

P0710

P0712

P0713

AX

DTC Detection Condition		Trouble Area
ATF temperature sensor resistance changes from (a) to		• Open or short in ATF temperature sensor circuit
(b) or from (b) to (a) in less than 0.5 sec., and P0712 and		•	ATF temperature sensor
P0713 are not detected (1 trip detection logic):		•	ECM
(a)	ATF temperature sensor resistance is less than 79
(b)	ATF temperature sensor resistance is more than 156
	k
ATF temperature sensor resistance is less than 79 for		• Short in ATF temperature sensor circuit
0.5 sec. or more (1 trip detection logic)		•	ATF temperature sensor
		•	ECM
•	ATF temperature sensor resistance is more than 156	• Open in ATF temperature sensor circuit
	k for 15 min. or more after engine start	•	ATF temperature sensor
•	DTC is detected for 0.5 sec. or more (1 trip detection	•	ECM
	logic)

MONITOR DESCRIPTION

ATF temperature sensor converts ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is less than 79 *1 or more than 156 k *2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will illuminate the MIL and store the DTC.

HINT:

•*1: 150 C (302 F) or more is indicated regardless of the actual ATF temperature.

•*2: -40 C (-40 F) is indicated regardless of the actual ATF temperature.

•The ATF temperature can be checked on the intelligent tester display.

MONITOR STRATEGY

Related DTCs	P0710: ATF temperature sensor/Range check (Chattering)
	P0712: ATF temperature sensor/Range check (Low resistance)
	P0713: ATF temperature sensor/Range check (High resistance)
Required sensors/Components	ATF temperature sensor
Frequency of operation	Continuous
Duration	0.5 sec.
MIL operation	Immediate
Sequence of operation	None

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM	AX–49

TYPICAL ENABLING CONDITIONS

P0710, P0712: Range check (Chattering, Low resistance)

The monitor will run whenever the following DTCs are not present.	None
The typical enabling condition is not available.	-

P0713: Range check (High resistance)

The monitor will run whenever the following DTCs are not present.	None
Time after engine start	15 min. or more

TYPICAL MALFUNCTION THRESHOLDS

P0710: Range check (Chattering)

ATF temperature sensor resistance	Less than 79
	or
	more than 156 k

P0712: Range check (Low resistance)

ATF temperature sensor resistance Less than 79

P0713: Range check (High resistance)

ATF temperature sensor resistance More than 156 k

COMPONENT OPERATING RANGE

ATF temperature sensor Resistance: 79 to 156 k

WIRING DIAGRAM

ATF Temperature Sensor

(ECT Solenoid)

	ECM
THO	THO1

AX

E2	E2

C119782E01

AX–50	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)

THO

E2

C054864E19

(a)Disconnect the E1 wire connector.

(b)Measure the resistance of the transmission wire.

Standard resistance

Tester Connection		Specified Condition
1	(THO) - 6 (E2)	79	to 156 k
1	(THO) - Body ground	10 k	or higher
6	(E2) - Body ground	10 k	or higher

HINT:

If the resistance is out of the specified range of either of the ATF temperatures shown in the table below, the driveability of the vehicle may decrease.

Standard resistance

ATF Temperature	Specified Condition
10 C (68 F)	6.4 k
110 C (230 F)	0.2 k

NG

REPAIR OR REPLACE TRANSMISSION

WIRE

OK

2 CHECK WIRE HARNESS (TRANSMISSION WIRE - ECM)

AX

(a) Disconnect the E3 and E4 ECM connectors.

E3

E4

(b) Measure the resistance of the wire harness side

connectors.

Standard resistance

Tester Connection

Specified Condition

E4-24 (THO1) - E3-28 (E2)

79

to 156 k

E4-24 (THO1) - Body ground

10 k

or higher

E3-28 (E2) - Body ground

10 k

or higher

E2

THO1

C119795E01

REPAIR OR REPLACE HARNESS AND

NG

CONNECTOR

OK

REPLACE ECM

	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM		AX–51
DTC	P0711	Transmission Fluid Temperature Sensor "A"
		Performance

DESCRIPTION

Refer to DTC P0710 (see page AX-42).

DTC No.

DTC Detection Condition

Trouble Area

P0711	Both (a) and (b) are detected (2 trip detection logic):
	(a)	12 sec. after engine start, temperature of
		atmosphere and that of engine coolant temperature
		are more than -10 C (14 F)
	(b)	After normal driving for over 17 min. and 9 km (5.6
		miles), ATF temperature is less than 10 C (50 F)

•Transaxle fluid level

•ATF temperature sensor

•ECM

MONITOR DESCRIPTION

This DTC indicates that there is a problem with output from the ATF temperature sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature and detects open and short circuits of the ATF temperature circuit or faults in the ATF temperature sensor.

After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature is below 10 C (50 F) after running the vehicle for a certain period, the ECM interprets this as a fault, and illuminates the MIL.

MONITOR STRATEGY

Related DTCs	P0711: ATF temperature sensor/Rationality check
Required sensors/Components	ATF temperature sensor
Frequency of operation	Continuous
Duration	Continuous
MIL operation	2 driving cycles
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever this DTC is not present.	None
Time after engine start	16 min. and 40 sec. or more
ECT	-15	C (5 F) or more
ATF temperature circuit	Not circuit malfunction
ECT (Engine coolant temperature) sensor circuit	Not circuit malfunction
Throttle sensor circuit	Not circuit malfunction
IAT (Intake air temperature) sensor circuit	Not circuit malfunction
Driving distance after engine start	9 km (5.6 miles) or more
IAT (12 sec. after engine start)	-10	C (14 F) or more
ECT (12 sec. after engine start)	-10	C (14 F) or more

AX

TYPICAL MALFUNCTION THRESHOLDS

ATF temperature Less than 10 C (50 F)

COMPONENT OPERATING RANGE

ATF temperature

Resistance: 79 to 156 k

AX–52	U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

WIRING DIAGRAM

Refer to DTC P0710 (see page AX-43).

INSPECTION PROCEDURE

HINT:

Using the intelligent tester's DATA LIST allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshooting is one way to save time.

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

1.Warm up the engine.

2.Turn the ignition switch OFF.

3.Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.

4.Turn the ignition switch ON.

5.Turn the intelligent tester ON.

6.Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST.

7.Follow the instructions on the tester and read the DATA LIST.

Item	Measurement Item/	Normal Condition
	Range (Display)
AT FLUID TEMP	ATF temperature sensor value/	• After stall test:
	Min.: -40 C (-40 F)	Approximately 80 C (176 F)
	Max.: 215 C (419 F)	• Equal to ambient temperature
		during cold soak

Diagnostic Note

If value is -40 C (-40 F) or 215 C (419 F), ATF temperature sensor circuit is opened or short circuited

HINT:

•When DTC P0712 is output and the intelligent tester output is 150 C (302 F) or more, there is a short circuit.

•When DTC P0713 is output and the intelligent tester output is -40 C (-40 F), there is an open circuit. Measure the resistance between terminal THO1 (THO) and the body ground.

AX	Temperature Displayed	Malfunction
	-40 C (-40 F)	Open circuit
	150 C (302 F) or more	Short circuit

HINT:

If a circuit related to the ATF temperature sensor becomes open, P0713 is set in approximately 0.5 seconds.

It is not necessary to inspect the circuit when P0711 is set.

1 CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711)

(a)Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.

(b)Turn the ignition switch ON and push the intelligent tester main switch ON.

(c)Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

(d)Read the DTCs using the intelligent tester.

Result

Display (DTC output)	Proceed to
Only P0711 is output	A
P0711 and other DTCs	B