DAF Truck Fault Codes

Caution: Two main modes are used for diagnostics: current self-test and testing.

To obtain the output diagnostic code, you must perform the following procedures.

1. Check the initial conditions.

A) The battery voltage is not less than 11 volts.

B) Throttle valve - completely closed.

C) Control lever for the gearbox - in neutral (I did in the parking lot - DAF).

D) All additional equipment is off.

E) The engine is warm to normal temperature.

2. Switch on the ignition, but do not start the engine.

3. Short the terminals of the diagnostic connector "TE1" and "E1".

4 Read the diagnostic code by the number of flashes of the "CHECK" display.

A) Normal operation of the system (no malfunction) - the light board lights up and goes off 2 times per second.

B) Fault code display.

If there is a malfunction, the light panel flashes every 0.5 seconds. The first sequence of flashes corresponds to the first number of the diagnostic code consisting of two digits. After a pause of 1.5 seconds, the second flash sequence corresponding to the second number of code is output. If two or more fault codes are present, a 2.5 second interval is established between them. After all the codes are output, there is a pause of 4.5 seconds, and then all of them are repeated until the terminals TE1 "and" E1 "of the diagnostic socket are closed.

Attention: in comparison with the usual self-diagnostic mode, self-test in the test mode has an increased sensitivity to detecting faults.

This allows you to identify malfunctions in the electrical circuits of the start-up system, the air conditioning system, and also in the electrical circuit of the start inhibit switch.

Self-test in test mode allows you to identify faults that are recorded and normal self-diagnosis.

1. Check the initial conditions.

A) The battery voltage is not less than 11 volts.

B) Engine warmed to normal operating temperature

C) Control lever for the gearbox - in neutral (I did in the parking lot - DAF).

D) All additional equipment is off.

2. Short the leads of the diagnostic connector "TE2" and "E1", then turn on the ignition and the self-diagnosis system will function in test mode.

Attention: Confirming that the self-diagnosis system is functioning in the test mode is the flashing of the "CHECK" display when the ignition is switched on. In this case, the time between the end and the beginning of successive pulses (flashes), i.e., the duty cycle of the pulses, is 0.13 seconds.

3. Start the engine and start driving at 10 km / h or higher.

4. Simulate situations in which a malfunction occurs.

5. Connect the leads "TE1" and "E1" of the diagnostic socket.

6. Read the diagnostic codes for the number of flashes of the "CHECK" light.

7 After diagnosis, disconnect the wires from the diagnostic socket.

Attention:

- The system will not enter test mode, if the outputs "TE2" and "E1" are closed after the ignition is switched on.

- At a vehicle speed of 5 km / h and lower, code # 42 (speed sensor) will be output, which is not a sign of a malfunction.

- If the engine does not turn by the starter, code 43 (starter) will be displayed, which is not a sign of a malfunction.

- If the automatic transmission control lever is in the "D", "2", "L" or "R" positions, or if the air conditioner is switched on, or if the accelerator pedal is fully depressed, code No. 51 ("air conditioning" ), Which, however, is not a sign of a malfunction.

12 - Control signal from the distributor;

13 - Control signal from the distributor;

14 - Ignition system;

16 - Control signal from automatic transmission;

17 - Processor of the electronic control unit;

21 - Oxygen sensor (heater);

21 - Oxygen sensor;

22 - The gauge of temperature of a cooling liquid;

24 - Intake air temperature sensor;

25 - Signal of lean mixture (At a speed of more than 1500

Rpm and speed up to 100 km / h for 90 seconds or more

No signal from the oxygen sensor);

31 - Absolute pressure sensor in the intake manifold;

33 - the valve of a control system of frequency of rotation of idling;

36 - Sensor CPS;

41 - Throttle Position Sensor;

42 - Vehicle speed sensor;

43 - Starter (launch system);

51 - A / C switch;

52 - Knock sensor;

81 - Electronic control of automatic transmission (ECT1);

83 - Electronic control of automatic transmission (ESA1);

84 - Electronic control of automatic transmission (ESA2);

85 - Electronic control of automatic transmission (ESA3);

42 - Rotational speed sensor (instrument cluster) - open circuit or short circuit;

61 - Speed sensor No. 2 (Gearbox) (A245E) - open circuit or short circuit;

62 - Solenoid valve # 1 - open circuit or short circuit;

63 - Solenoid valve No. 2 - open circuit or short circuit;

64 - Torque converter lock solenoid valve - open circuit or short circuit;

37 - Speed sensor No. 2 (Gearbox) - open circuit or short circuit;

42 - Rotational speed sensor (instrument cluster) - open circuit or short circuit;

62 - Solenoid valve # 1 - open circuit or short circuit;

63 - Solenoid valve No. 2 - open circuit or short circuit;

64 - Solenoid valve for controlling the quality of the torque converter lock - a break in the wiring or a short circuit;

68 - Solenoid valve No. 3 (converter lock-up valve) - open circuit or short circuit;

44 - Speed sensor for the rear output shaft of the gearbox - a break in the wiring or a short circuit;

61 - Front left output speed sensor - open circuit or short circuit;

62 - Solenoid valve # 1 - open circuit or short circuit;

63 - Solenoid valve No. 2 - open circuit or short circuit;

64 - Locking solenoid valve of hydrotransformer - breakage of wiring or short circuit;

73 - Solenoid valve for controlling the interlocking of the inter-axle differential No. 1 - open circuit or short circuit;

74 - (until 1996) Solenoid valve for controlling the interlocking of the center differential №2 - interruption of the wiring or short circuit;

86 - (until 1996) Engine speed sensor - broken wiring or short circuit;

88 - (until 1996) Wiring between the electronic automatic transmission control unit and the electronic engine control unit.