MAN FFR Onboard Computer User Manual

https://truckmanualshub.com/

MAN FFR Onboard Computer Fault codes list

Code (SPN)Description		The reason, check and reaction of the system.
32	The state of the divider.	Priority 3. Indication only when the car is stationary, only indication of the
		fault, the indication of actions for the error is not required. On	Still Car
		Lights the alarm lamp STOP Yellow. The state of the divider could not be
		determined for the specified measurement time. Check the circuit, the pins
		in the connectors and the accuracy of the speed sensor readings at the input
		of the gearbox (in 368). Check the accuracy of the rotation signal using the
		PC. Check resistance: from side FFR Between Contacts Х3/12 (+) and х1/3 (-)
		resistance should correspond to approximately 1.78 Kom, on the part of the
		sensor resistance should correspond to approximately 1.05 Kom. Check the
		voltage between the unit pins FFR Х3/12 (+) and х1/3 (-), the voltage should
		equal approximately 1 v. At idle. WhenTagging: see SPN 770 and 771.
161	Rotational speed at the	Priority 3. Indication only when the car is stationary, only indication of the
	input of the gearbox.	fault, the indication of actions for the error is not required. On a stationary
		car the warning lamp is illuminated STOP Yellow. Incorrect signal from the
		speed sensor at the input of the gearbox (in 368) the status "Signal
		unavailable" is set, it is impossible to determine the state of the divider, the
		function "Comfort-ShiftLocked. Check the circuit, the pins in the connectors
		and the accuracy of the speed sensor readings at the input of the gearbox (in
		368). Check the accuracy of the rotation signal using the PC. Check
		resistance: from side FFR Between Contacts Х3/12 (+) and х1/3 (-) resistance
		should correspond to approximately 1.78 Kom, on the part of the sensor
		resistance should correspond to approximately 1.05 Kom. Check the voltage
		between the unit pins FFR Х3/12 (+) and х1/3 (-), the voltage should equal
		approximately 1 v. At idle.
168	Battery voltage	Priority 3. Indication only when the car is stationary, only indication of the
		fault, the indication of actions for the error is not required. On a stationary
		car the warning lamp is illuminated STOP Yellow. The operating voltage is
		more than 32 v. Check the accuracy of the signal using a PC, check wiring,
		pins in connectors, generator and batteries. Check the voltage on the contact
		unit FFR Х1/2, X1/1 (+), х1/3 (-), the voltage must be
		Between 20 and 28 v. If the voltage measured on the connectors is
		Block FFR Normal, replace the unit FFR.
		Priority 3. Indication only when the car is stationary, only indication of the
		fault, the indication of actions for the error is not required. On a stationary
	battery power supply	car the warning lamp is illuminated STOP Yellow. The operating voltage is less
168	voltage.	than 16 v. Check the accuracy of the signal using a PC, check wiring, pins in
		connectors, generator and batteries. Check the voltage on the contact unit
		FFR Х1/2, Х1/1 (+), х1/3 (-), the voltage should be within the limits between
		20 and 28 v. If the voltage measured on the connectors of the Unit FFR
		Normal, replace the unit FFR.

https://truckmanualshub.com/

Auxiliary device for the

572activation of the retarder brake.

Accelerator pedal, Signal

697PWM1 (signal pulse modulation).

Accelerator pedal, Signal

698PWM2 (signal pulse modulation).

770	Раздельный H.

Priority 5: Indication during stop and during vehicle movement. Signal Lamp STOP is lit in yellow and during movement and during stop or parking. The wiring of the data line from the touch control switch to the retarderer is faulty. The switch stops functioning. The included brake retardeactivates by pressing the accelerator pedal. Check the accuracy of the signal using the PC, check the wiring, pins in the connectors, touch the brake-retarderer. Check the resistance of the data transmission line from the touch switch, between the unit pins FFR Х2/10 (+) and х1/3 (-) on the side of the block FFR Approx. 1.5 PTO, on the car side approximately 1.6 pto. Check the wire resistance of the touch switch of the retarder, between the pins of the unit FFR X2/6 (+) and x 1/3 (-) on the side of the block FFR Approximately 1.7 IOM, on the side of the car approximately 1.2 IOM. Check the voltage of the data transmission line from the touch switch, between the unit pins FFR X2/10 (+) and х1/3 (-), jumper (test block) Closed: approx. 14.2 v., jumper (test block) Open: On the side of the unit FFR Approx. 23.5 in, on the side of the car approx. 14 v. Check the voltage of the timing wire of the retarder touch switch, between the unit pins FFR Х2/6 (+) and x 1/3 (-) jumper (test block) Closed: approx. 12.3 v., jumper (test block) Open: On the side of the unit FFR Approximately 13.5 v., on the side of the car approximately 22.5 v.

Priority 2: A malfunction that requires removal from the service center. Signal Lamp STOP Lights up permanently in red. Missing or incorrect signal PWM1 Accelerator pedal (a 410). To identify the position of the accelerator pedal, a signal is PWM2. Engine speed and torque are limited (1800 RPM and 80% limit). Check the accuracy of the signal PWM1 with PC, check wiring, pins in connectors. Perform measurement using a portable oscilloscope Fluke ScopeMeter 123 or similar device (frequency 200 Hz). Check the voltage on the unit FFR Between pins х2/11 (+) and х1/3 (-): The jumper (Test block) is closed, the signal Low: (The accelerator pedal is fully pressed) approx. 8 v., the Signal HIGH: approx. 20 v.; Jumper (test block) Open: On the side of the unit FFR Approx. 25.4 v., on the side of the car approx. 0.5 v. If the problem is not found, try recalibrating the accelerator pedal.

If the voltage drop when the ignition is on, the PWM1 (а410/pin5) and power supply on PWM2 (а410/pin6) is more than 100 MS, the fault code is registered.

Priority 2: A malfunction that requires removal from the service center. Signal Lamp STOP Lights up permanently in red. Missing or incorrect signal PWM2 Accelerator pedals (a 410). To identify the position of the accelerator pedal, a signal is PWM1. Engine speed and torque are limited (1800 RPM and 80% limit). Check the accuracy of the signal PWM2 using PC, check wiring, pins in connectors. Perform measurement using a portable oscilloscope Fluke ScopeMeter 123 or similar device (frequency 200 Hz). Check the voltage on the unit FFR Between pins х2/18 (+) and х1/3 (-): The jumper (Test block) is closed, the signal Low: approx. 8 v., Signal HIGH (Accelerator pedal is fully pressed): approx. 20 v.; Jumper (test block) Open: On the side of the unit FFR Approx. 25.5 v., from the car side approx. 0 v. If the problem is not found, try recalibrating the accelerator pedal.

If the voltage drop when the ignition is on, the PWM1 (а410/pin5) and power supply on PWM2 (а410/pin6) is more than 100 MS, the fault code is registered.

Priority 5: Indication during stop and during vehicle movement. Signal Lamp STOP is lit in yellow and during movement and during stop or parking. Malfunction in electromagnetic valve wiring detected SPLIT-HIGH (Y307). The malfunction is recorded in the fault recorder in case the malfunction is recorded during three cycles of measurement (500 ms). The divider valve stops being controlled.

Using a PC, you can test the elements "SPLIT-HIGHandSPLIT- LOW". Check resistance between pins х3/13 (+) and х4/6 (-): On the side of the block FFR

Approximately 6 Kom, on the car side approximately 83.3 ohm. Check resistance between pins х3/13 (+) and х1/3 (-): On the side of the block FFR approx. 4.3 com, on the side of the car

---. Check the voltage between the unit pins FFR {3/13 (+) and х4/6 (-): At an activated electromagnetic valve approximately 27.6 v. At the deactivated valve approximately 0 v.

https://truckmanualshub.com/

771	Раздельный.	Priority 5: Indication during stop and during vehicle movement. Signal Lamp
		STOP is lit in yellow and during movement and during stop or parking.
		Malfunction in electromagnetic valve wiring detected SPLIT-LOW (Y307). The
		malfunction is recorded in

898

1045

3010

	Fault recorder in case the fault is registered during three cycles of
	measurement (500 ms). The divider valve stops being controlled. Using a PC,
	you can test the elements "SPLIT-HIGHandSPLIT- LOW". Check resistance
	between pins х4/7 (+) and х4/6 (-): On the side of the block FFR
	Approximately 6 Kom, on the car side approximately 84.6 ohm. Check
	resistance between pins х4/7 (+) and х1/3 (-): On the side of the block FFR
	approx. 4.3 com, on the side of the car--
	-. Check the voltage between the unit pins FFR {4/7 (+) and х4/6 (-): At an
	activated electromagnetic valve approximately 27.6 v. At the deactivated
	valve approximately 0 v.
	Priority 5: Indication during stop and during vehicle movement. Signal Lamp
	STOP is lit in yellow and during movement and during stop or parking.
	Incorrect signal from the group of resistors (R134). Stage HGB (maximum
	speed limit) remains activated. After the next turn, select the RGB0
	(Maximum speed limit 1 is activated). With the help of PC check signal
Group of resistors limit	accuracy, check wiring, pins in connectors, check the body interface х1996,
maximum speed.	check the group of resistors (R134). Check the resistance between pins х2/6
	(+) and х1/3 (-) on the side of the unit FFR Approximately 6.5 Kom, on the
	side of the car approximately 0.511 Kom. Check resistance of the group of
	resistors (R134): Between contacts 5 and 7/6 approximately 3.09 Kom,
	between contacts 5 and 3/4 approximately 1.37 Kom, between contacts 5
	and 2/8 approximately 0.51 Kom, between contacts 5 and 1/9 approximately
	8.2 kom.
	Check the voltage between the unit pins FFR: х2/6 (+) and х1/3 (-)
	approximately 460 mv.
	Priority 5: Indication during stop and during vehicle movement. Signal Lamp
	STOP is lit in yellow and during movement and during stop or parking.
	Closure of the lock on the output of the transmission (end stage) of the
	electromagnetic valve block (Y307). The transmission lock is no longer
	controlled. Check with PC the actuators (lock on transmission), wiring, pins in
The final stage of the	connectors. On gearboxes type ZF16S151/ZF16S181 Check the block of
transmission lock.	electromagnetic valves (Y307). Check the resistance between the pins x 4/13
	(+) and х3/5 (-): On the side of the unit FFR Approximately 8.9 ohm, on the
	side of the car approximately 135 ohms. Check resistance between pins
	х4/13 (+) and x 1/3 (-): On the side of the block FFR Approx. 8.3 Kom, on the
	side of the car---. Check the voltage between pins х4/13 (+) and х3/5 (-):
	When an electromagnetic valve is activated approximately 27.5 v., when The
	solenoid valve is deactivated by approx. 0 v.
	Priority 5: Indication during stop and during vehicle movement. Signal Lamp
	STOP is lit in yellow and during movement and during stop or parking.
	Incorrect signal from the group of resistors (R134). The limit level for the
	speed range remains activated. At the first turn, step 0 is activated for the
	engine speed range. With the help of PC check signal accuracy, check wiring,
Limit the speed and torque.	pins in connectors, check the body interface х1996, check the group of
	resistors (R134). Check the resistance between pins х2/1 (+) and х1/3 (-): On
	the side of the block FFR Approximately 6.5 ohm, on the side of the car
	approximately 0.511 ohms. Check resistance of the group of resistors (R134):
	Between contacts 5 and 7/6 approximately 3.09 Kom, between contacts 5
	and 3/4 approximately 1.37 Kom, between contacts 5 and 2/8 approximately
	0.51 Kom, between contacts 5 and 1/9 approximately 8.2 kom. Check the
	voltage between the unit pins FFR: х2/1 (+) and х1/3 (-) approximately 460
	mv.