Toyota Camry 2007-2009 Service Manual - Cruise_Control

Expression

CRUISE CONTROL – CRUISE CONTROL SYSTEM

CC–1

CRUISE CONTROL SYSTEM

PRECAUTION

1. EXPRESSIONS OF IGNITION SWITCH

(a) The type of ignition switch used on this model differs

according to the specifications of the vehicle.

Switch Type Ignition Switch (position) Engine Switch (condition)

Ignition switch off LOCK Off Ignition switch on (IG) ON On (IG) Ignition switch on (ACC) ACC On (ACC) Engine start START Start

2. HANDLING PRECAUTION FOR CRUISE CONTROL SYSTEM

(a) Turn the cruise control main switch off when not

using the cruise control system.

(b) Be careful as the vehicle speed increases when

driving downhill with the cruise control system on.

according to the cruise control system status. When the cruise control system is operating, the + (ACCEL) function operates. When the cruise control system is not operating, the RES (RESUME) function operates.

(d) If the CRUISE main indicator light blinks while the

cruise control system is operating, turn the cruise control main switch off to reset the cruise control system. After the reset, if the cruise control main switch cannot be turned on, or the cruise control system is canceled immediately after turning the cruise control main switch on, the system may have a malfunction.

(e) Do not use the cruise control system where the road

conditions are as follows:

• Heavy traffic

• Steep decline

• Roads with sharp turns

• Icy or snowy roads

• Slippery roads

CC–2

PARTS LOCATION

SKID CONTROL ECU WITH ACTUATOR

CRUISE CONTROL – CRUISE CONTROL SYSTEM

ECM (*2)

FRONT VEHICLE SPEED SENSOR RH

ECM (*1)

REAR VEHICLE SPEED SENSOR RH

THROTTLE BODY ASSEMBLY

- THROTTLE POSITION SENSOR

- THROTTLE CONTROL MOTOR

REAR VEHICLE SPEED SENSOR LH

PARK / NEUTRAL POSITION SWITCH

TRANSMISSION CONTROL ECU (*1)

(*3)

FRONT VEHICLE SPEED SENSOR LH

ENGINE ROOM R/B AND J/B

-ALT FUSE *1: 2GR-FE

-ST/AM2 FUSE *2: 2AZ-FE

-FL MAIN FUSE *3: U660E

E129946E01

CRUISE CONTROL – CRUISE CONTROL SYSTEM

CC–3

CLUTCH SWITCH

STOP LIGHT SWITCH

COMBINATION METER

- CRUISE MAIN INDICATOR LIGHT

(*1)

ACCELERATOR PEDAL POSITION SENSOR

DLC3

INSTRUMENT PANEL J/B

-STOP FUSE

-IGN FUSE

CRUISE CONTROL MAIN SWITCH

SPIRAL CABLE

*1: M/T

E129947E01

CC–4

CRUISE CONTROL – CRUISE CONTROL SYSTEM

SYSTEM DIAGRAM

Stop Light Switch

Park / Neutral Position Switch (A/T)

Transmission Control ECU (2GR-FE)

CRUISE Main Indicator Light

Accelerator Pedal Position Sensor

Throttle Position Sensor and Motor

ECM

Cruise Main Switch

Combination Meter

Clutch Switch (M/T)

Skid Control ECU

DLC3

Vehicle Speed Sensor

Communication Table:

Sender Receiver Signal Line

ECM Combination Meter ECU

CAN

CRUISE main indicator operation signal

E129950E01

CAN

CRUISE CONTROL – CRUISE CONTROL SYSTEM

SYSTEM DESCRIPTION

1. CRUISE CONTROL SYSTEM

This system is controlled by the ECM, and is activated by the throttle position sensor and motor . The ECM contro ls the following functions: ON-OFF, - (COAST)/SET, + (ACCEL)/RES (RESUME), CANCEL, vehicle speed operation, motor output control, and overdrive control.

• The ECM compares the driving vehicle speed from the speed sensor with the stored vehicle speed set through the cruise control main switch. The ECM instructs the throttle valve motor of the throttle body assembly to close the valve when the driving speed is greater than the stored speed, and instructs it to open the valve when the driving speed is less than the stored speed.

• The ECM receives signals such as ON-OFF, (COAST)/SET, + (ACCEL)/RES (RESUME), and CANCEL from the cruise control main switch and executes the command.

• The ECM illuminates the combination meter's CRUISE main indicator light when it receives a cruise control main switch ON signal.

• The ECM cancels the cruise control system when the brake pedal is depressed and the ECM receives a stop light switch signal.

• The ECM cancels the cruise control system when the shift lever is moved from the D to the N position or the transmission is shifted to the 3rd, 2nd, or 1st gear with the shift lever in the S position, and the ECM receives a park/neutral position switch signal.

• The ECM cancels the cruise control system when the clutch pedal is depressed and the ECM receives a clutch switch signal.

2. LIMIT CONTROL

(a) Low speed limit

The lowest possible limit of the speed setting range is set at approximately 40 km/h (25 mph). The cruise control system cannot be set when the driving vehicle speed is below the low speed limit. Cruise control operation will be automatically canceled but the stored vehicle speed will be retained when the vehicle speed drops below the low speed limit 40 km/h (25 mph) while the cruise control is in operation.

(b) High speed limit

The highest possible limit of the speed setting range is set at approximately 200 km/h (125 mph). The cruise control system cannot be set when the driving vehicle speed is over the high speed limit. Also, + (ACCEL)/RES (RESUME) cannot be used to increase speed beyond the high speed limit.

CC–5

CC–6

CRUISE CONTROL – CRUISE CONTROL SYSTEM

3. OPERATION OF CRUISE CONTROL

The cruise control main switch operates 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), T AP-UP, and CANCEL. The SET, TAP-DOWN, and - (COAST) functions, and the RES (RESUME), TAPUP, and + (ACCEL) functions are operated with the same switch. The cruise control main switch is an automatic return type switch which turns on only while operating it in the direction of each arrow and turns off after releasing it. (a) SET CONTROL

The vehicle speed is stored and constant speed control is maintained when pushing the cruise control main switch to - (COAST)/SET while driving with the main switch on (the CRUISE main indicator light is on), and the vehicle speed is within the set speed range (between the low and high speed limits).

(b) - (COAST) CONTROL

When the cruise control main switch is set to (COAST)/SET and held in that position while the cruise control system is operating, the ECM sends a "throttle valve opening angle 0°" demand signal to the cruise control system. Then the vehicle speed, when the cruise control main switch is released, is stored and maintained. HINT: An actual throttle valve opening angle of 0° is not possible due to the idle speed control, etc.

When tapping down the cruise control main switch to - (COAST)/SET (for approximately 0.6 seconds) while the cruise control system is in operation, the stored vehicle speed decreases each time by approximately 1.6 km/h (1.0 mph). When the cruise control main switch is released from - (COAST)/SET and the difference between the driving and stored vehicle speed is more than 5 km/h (3 mph), the driving vehicle speed is stored and constant speed control is maintained.

(d) ACCELERATION CONTROL

The throttle valve motor of the throttle body assembly is instructed by the ECM to open the throttle valve when + (ACCEL)/RES (RESUME) on the cruise control main switch is pressed and held while the cruise control system is in operation. When the cruise control main switch is released from + (ACCEL)/RES (RESUME), the vehicle speed is stored and the vehicle is controlled at a constant speed.

CRUISE CONTROL – CRUISE CONTROL SYSTEM

(e) TAP-UP CONTROL

When tapping up the cruise control main switch to + (ACCEL)/RES (RESUME) (for approximately 0.6 seconds) while the cruise control system is in operation, the stored vehicle speed increases each time by approximately 1.6 km/h (1.0 mph). However , when the difference between the driving and the stored vehicle speed is more than 5 km/h (approximately 3.1 mph), the stored vehicle speed will not be changed.

(f) RESUME CONTROL

If cruise control operation was canceled with the stop light switch or the CANCEL switch, and if driving speed is within the limit range, pushing the cruise control main switch to + (ACCEL)/RES (RESUME) restores vehicle speed memorized at the time of cancellation, and maintains constant speed control.

(g) MANUAL CANCEL CONTROL

Performing any of the following cancels the cruise control system while in operation (the stored vehicle speed in the ECM is maintained).

• Depressing the brake pedal

• Depressing the clutch pedal

• The shift lever is moved from the D to the N position or the transmission is shifted to the 3rd, 2nd, or 1st gear with the shift lever in the S position.

• Pulling the cruise control main switch to CANCEL

• Turning the cruise control main switch off (the stored vehicle speed in the ECM is not maintained).

4. AUTO CANCEL (FAIL-SAFE)

This system has an automatic cancellation function (failsafe) (See page CC-16).

CC–7

CC–8

CRUISE CONTROL – CRUISE CONTROL SYSTEM

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:

• Use the following procedures to troubleshoot the cruise control system.

• *: Use the intelligent tester.

VEHICLE BROUGHT TO WORKSHOP

PROBLEM SYMPTOM CONFIRMATION

CHECK CAN COMMUNICATION SYSTEM*

DTC CHECK AND CLEAR*

Refer to PRECAUTION (See page CA-1). (a) Check for output DTCs.

Result

Result Proceed to

CAN DTC is not output A

CAN DTC is output B

HINT: The ECM of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

Refer to DTC CHECK / CLEAR (See page CC-16).

PROCEED TO "CAN COMMUNICATION SYSTEM"

DTC CHECK (OTHER THAN CAN SYSTEM DTC)*

Result

Result Proceed to

DTC is not output A

DTC is output B

CRUISE CONTROL – CRUISE CONTROL SYSTEM

CC–9

DTC CHART

GO TO STEP 10

PROBLEM SYMPTOM CONFIRMATION

Refer to DIAGNOSTIC TROUBLE CODE CHART (See page

CC-18).

Result

Symptom does not occur B

GO TO STEP 7

Result Proceed to

Symptom occurs A

SYMPTOM SIMULATION

Go to step 7

PROBLEM SYMPTOMS TA BLE

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE (See page IN-40).

Refer to the PROBLEM SYMPTOMS TABLE (See page CC-

11).

GO TO STEP 9

CIRCUIT INSPECTION

TERMINALS OF ECM

Refer to TERMINALS OF ECM (See page CC-13).

CC–10

CRUISE CONTROL – CRUISE CONTROL SYSTEM

END

IDENTIFICATION OF PROBLEM

REPAIR OR REPLACE

CONFIRMATION TEST

E107085

ROAD TEST

1. PROBLEM SYMPTOM CONFIRMATION

(a) Inspect the SET function.

(1) Turn the cruise control main switch on. (2) Drive at the required speed (40 km/h (25 mph)

or higher).

(3) Push the cruise control main switch to -

(COAST)/SET.

(4) After releasing the switch, check that the vehicle

cruises at the set speed.

E107086

(b) Inspect the ACCELERATION function.

(1) Turn the cruise control main switch on. (2) Drive at the required speed (40 km/h (25 mph)

or higher).

(3) Push the cruise control main switch to -

(COAST)/SET.

(4) Check that vehicle speed increases while the

cruise control main switch is pushed to + (ACCEL)/RES (RESUME), and that the vehicle cruises at the newly set speed when the switch is released.

(5) Push the cruise control main switch to +

(ACCEL)/RES (RESUME) and then release it immediately . Check that vehicle speed increases by approximately 1.6 km/h (1.0 mph) (tap-up control).

CRUISE CONTROL – CRUISE CONTROL SYSTEM

(1) Turn the cruise control main switch on. (2) Drive at the required speed between 40 km/h

(25 mph) and 200 km/h (125 mph).

(3) Push the cruise control main switch to -

(COAST)/SET.

(4) Check that vehicle speed decreases while the

cruise control main switch is pushed to (COAST)/SET, and the vehicle cruises at the

E107085

newly set speed when the switch is released.

(5) Push the cruise control main switch to -

(COAST)/SET, and then release it immediately. Check that vehicle speed decreases by approximately 1.6 km/h (1.0 mph) (tap-down control).

(d) Inspect the CANCEL function.

(1) Turn the cruise control main switch on. (2) Drive at the required speed between 40 km/h

(25 mph) and 200 km/h (125 mph).

(3) Push the cruise control main switch to -

(COAST)/SET.

(4) When performing any one of the following,

check that the cruise control system is canceled and that the normal driving mode is reset.

E107087

• Depressing the brake pedal

• Depressing the clutch pedal

• The shift lever is moved from the D to the N position or the transmission is shifted to the 3rd, 2nd, or 1st gear with the shift lever in the S position

• Turning the cruise control main switch off

• Pulling the cruise control main switch to CANCEL

CC–11

E107086

(e) Inspect the RES (RESUME) function.

(1) Turn the cruise control main switch on. (2) Drive at the required speed between 40 km/h

(25 mph) and 200 km/h (125 mph).

(3) Push the cruise control main switch to -

(COAST)/SET.

(4) Cancel the cruise control system by performing

any of the above operations (other than turning the main switch off).

(5) After pushing the cruise control main switch to +

(ACCEL)/RES (RESUME) at a driving speed of more than 40 km/h (25 mph), check that the vehicle resumes the speed set prior to the cancellation.

CC–12

CRUISE CONTROL – CRUISE CONTROL SYSTEM

Cruise control system:

Symptom Suspected area See page

Vehicle speed cannot be set. (The CRUISE main indicator light comes on.)

Pushing the ON-OFF button does not turn the cruise control system on. (Vehicle speed cannot be set.)

The cruise control is canceled while it is operating.

Pulling back on the control main switch does not cancel the cruise control. (The CRUISE main indicator light remains on.)

Pulling back on the control main switch does not cancel the cruise control. (The CRUISE main indicator light goes off.)

PROBLEM SYMPTOMS TABLE

HINT: Be sure to perform the SYMPTOM SIMULATION procedure before replacing the ECM. If these symptoms do not persist, the cause of the problem may be poor intermittent electrical contact (open or short) of a wire harness or connector.

1. Cruise control switch circuit CC-28

2. Combination meter ME-15

3. Vehicle speed sensor circuit CC-19

4. Stop light switch CC-20

5. Transmission range sensor circuit (U250E) AX-39

5. Park / Neutral position sensor circuit (U660E) AX-158

6. Clutch switch circuit CC-25

7. If the symptoms still occur after the above ares have been inspected and have proven to be normal, replace the ECM. (2AZ-FE)

7. If the symptoms still occur after the above ares have been inspected and have proven to be normal, replace the ECM. (2GR-FE)

1. Stop light switch circuit CC-20

2. Clutch switch circuit (M/T) CC-25

3. Vehicle speed sensor circuit CC-19

4. Cruise control switch circuit CC-28

5. Transmission range sensor circuit (U250E) AX-39

5. Park / Neutral position sensor circuit (U660E) AX-158

6. If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM. (2AZ- FE)

6. If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM. (2GR-FE)

1. Stop light switch circuit CC-20

2. Clutch switch circuit (M/T) CC-25

3. Transmission range sensor circuit (U250E) AX-39

3. Park / Neutral position sensor circuit (U660E) AX-158

4. Cruise control switch circuit CC-28

5. Vehicle speed sensor circuit CC-19

6. Combination meter ME-15

7. If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM. (2AZ-FE)

7. If the symptoms still occur after the above areas have been inspected and have proven to be normal, replace the ECM. (2GR-FE)

1. Cruise control switch circuit CC-28

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2AZ-FE)

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2GR-FE)

Replace ECM (2AZ-FE) ES-432 Replace ECM (2GR-FE) ES-518

ES-432

ES-518

ES-432

ES-518

ES-432

ES-518

ES-432

ES-518

CRUISE CONTROL – CRUISE CONTROL SYSTEM

Symptom Suspected area See page

The cruise control is not canceled when vehicle speed drops below the low speed limit. (The CRUISE main indicator light remains on.)

The cruise control is not canceled when vehicle speed drops below the low speed limit. (The CRUISE main indicator light goes off.)

Depressing the brake pedal does not cancel the cruise control. (The CRUISE main indicator light remains on.)

Depressing the brake pedal does not cancel the cruise control. (The CRUISE main indicator light goes off.)

Depressing the clutch pedal does not cancel the cruise control. (The CRUISE main indicator light remains on.)

Depressing the clutch pedal does not cancel the cruise control. (The CRUISE main indicator light goes off.)

Moving the shift liver does not cancel the cruise control.

Hunting (Speed is not constant.)

The CRUISE main indicator light remains blinking.

1. Vehicle speed sensor circuit CC-19

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2AZ-FE)

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2GR-FE)

Replace ECM (2AZ-FE) CC-13 Replace ECM (2GR-FE) ES-518

1. Stop light switch circuit CC-20

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2AZ-FE)

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2GR-FE)

Replace ECM (2AZ-FE) ES-432 Replace ECM (2GR-FE) ES-518

1. Clutch switch circuit CC-25

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2AZ-FE)

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2GR-FE)

Replace ECM (2AZ-FE) ES-432 Replace ECM (2GR-FE) ES-518

1. Transmission range sensor circuit (U250E) AX-39

1. Park / Neutral position sensor circuit (U660E) AX-158

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2AZ-FE)

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM. (2GR-FE)

1. Vehicle speed sensor circuit CC-19

2. Combination meter ME-15

3. If the symptoms still occur after the above ares have been inspected and have proven to be normal, replace the ECM. (2AZ-FE)

3. If the symptoms still occur after the above ares have been inspected and have proven to be normal replace the ECM. (2GR-FE)

1. TC and CG terminal circuit CC-35

2. If the symptoms still occur after the above area has been inspected and has proven to be normal, replace the ECM.

ES-432

ES-518

ES-432

ES-518

ES-432

ES-518

ES-432

ES-518

ES-432

ES-518

CC-13

CC–13

CC–14

CRUISE CONTROL – CRUISE CONTROL SYSTEM

TERMINALS OF ECM

1. CHECK ECM

C24

*2 *2

*1 *1

C55

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*1: 2GR-FE

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*2: 2AZ-FE

A24

A55

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Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition

A55-27 (TC) - C55-81 (E1) A24-27 (TC) - C24-104 (E1)

A55-36 (STP) - C55-81 (E1) A24-36 (STP) - C24-104 (E1)

A55-40 (CCS) - C55-81 (E1) A24-40 (CCS) - C24-104 (E1)

A55-35 (ST1-) - C55-81 (E1) A24-35 (ST1-) - C24-104 (E1)

C24-56 (D) - C55-81 (E1) C24-56 (D) - C24-104 (E1)

P - W-B Ground Ignition switch on (IG) 10 to 14 V

P - W-B Ground

W - W-B Stop light signal

W - W-B

Cruise control main switch circuit

GR - W-B Stop light signal

C - W-B Clutch signal

Connect terminals TC and CG of DLC3

Ignition switch on (IG), Depress brake pedal

Ignition switch on (IG), Release brake pedal

Ignition switch on (IG) 10 to 14 V

CANCEL switch ON 6.6 to 10.1 V

SET/COAST switch ON 4.5 to 7.1 V

RES/ACC switch ON 2.3 to 4.0 V

MAIN switch ON Below 1 V

Ignition switch on (IG), Depress brake pedal

Ignition switch on (IG), Release brake pedal

Ignition switch on (IG), Depress clutch pedal

Ignition switch on (IG), Release brake pedal

Below 1 V

10 to 14 V

Below 1 V

10 to 14 V

Below 1 V

10 to 14 V



A107881E45

HINT: *1: 2GR-FE *2: 2AZ-FE

CRUISE CONTROL – CRUISE CONTROL SYSTEM

DIAGNOSIS SYSTEM

1. DESCRIPTION

The ECU controls the cruise control system of the vehicle. The data and DTCs relating to the cruise con trol system can be read from the DLC3 of the vehicle. If either DTC or CRUISE OK is not displayed on the multiinformation display on the combination meter when checking for DTCs, there may be a problem with either the combination meter or the CAN communication and multiplex communication systems. Use the intelligent tester to check and solve the problem.

2. CHECK DLC3

(a) The ECU uses the ISO 15765-4 for communication

CANH

SIL

protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.

CC–15

CANL

Terminal No. (Symbols) Terminal Description Condition Specified Condition

SIL (7) - SG (5) Bus "+" line During transmission Pulse generation CG (4) - Body ground Chassis ground Always Below 1 Ω SG (5) - Body ground Signal ground Always Below 1 Ω

BAT (16) - Body ground Battery positive Always 10 to 14 V

CANH (6) - CANL (14) CAN bus line

CANH (6) - CG (4) HIGH-level CAN bus line

CANL (14) - CG (4) LOW-level CAN bus line

CANH (6) - BAT (16) HIGH-level CAN bus line

CANL (14) - BAT (16) LOW-level CAN bus line

BAT

H100769E16

Ignition switch off Ignition switch off Ignition switch off Ignition switch off Ignition switch off

54 to 69 Ω 200 Ω or higher 200 Ω or higher

6 kΩ or higher 6 kΩ or higher

NOTICE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors.

If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.

(b) Connect the cable of the intelligent tester to the

DLC3, turn the ignition switch on (IG), and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem with either the vehicle or the tester.

• If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.

+ 32 hidden pages

Toyota Camry 2007-2009 Service Manual - Cruise_Control

Specifications and Main Features

Frequently Asked Questions

User Manual