Attention: do not start the engine.
2. Short the leads "THOSE1" And "E1" diagnostic socket.
3. Read and determine the fault code by the number of blinks of the indicator.
- A) If there are 2 flashes per second, then the system is working normally.
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- b) If there is 1 flash per second, then there is a malfunction in the system. The code consists of two digits, the first digit is determined by the initial series of flashes, followed by a 1.5 second pause and the second series of flashes, which corresponds to the second digit of the code. If there are two or more fault codes, then there will be a 2.5 second pause between them.
Attention: if there are several fault codes, the smallest code is always displayed first, and then the remaining codes in ascending order.
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4. Disconnect the pins "THOSE1" And "E1".
Table 1. Fault codes
A245E
Code | Malfunction |
37 | Speed sensor No. 2 (checkpoint) - broken wiring or short circuit |
38 | Automatic transmission fluid temperature sensor - open circuit or short circuit |
42 | Speed sensor (instrument cluster) - broken wiring or short circuit |
62 | Solenoid valve No. 1 - open wiring or short circuit |
63 | Solenoid valve No. 2 - open wiring or short circuit |
64 | Torque Converter Clutch Control Solenoid - Wiring Break or Short Circuit |
68 | Torque converter lock-up quality control solenoid valve - open wiring or short circuit |
Note: codes 62, 63, 64, 68 indicate a malfunction in the electrical part of the solenoid valves. Malfunctions in the mechanical part, for example, valve sticking, are not fixed by the self-diagnosis system.
A540N
Code | Malfunction |
42 | Speed sensor (instrument cluster) - broken wiring or short circuit |
44 | Gearbox rear output shaft speed sensor - open wiring or short circuit |
61 | Front output shaft speed sensor - open wiring or short circuit |
62 | Solenoid valve No. 1 - open wiring or short circuit |
63 | Solenoid valve No. 2 - open wiring or short circuit |
64 | Torque Converter Clutch Control Solenoid - Wiring Break or Short Circuit |
73 | Differential control solenoid valve - open wiring or short circuit |
77 | Main line pressure control solenoid valve - open circuit or short circuit |
*1: except models from 1996
A240E, A241E
Code | Malfunction |
42 | Speed sensor (instrument cluster) - broken wiring or short circuit |
61 | Speed sensor No. 2 (checkpoint) - broken wiring or short circuit |
62 | Solenoid valve No. 1 - open wiring or short circuit |
63 | Solenoid valve No. 2 - open wiring or short circuit |
64 | Torque Converter Clutch Control Solenoid - Wiring Break or Short Circuit |
Note: Code 61 is only defined on pre-1996 models.
Resetting trouble codes
1. After the repair, clear the memory of the automatic transmission control unit from the fault codes that are stored there. To do this, remove the fuse "EFI" for 10 seconds or more depending on the ambient temperature (the lower the temperature, the longer) with the ignition off.
Attention:
- to reset the trouble codes, disconnect the negative battery terminal for a while. In this case, the contents of the memory of control units of other systems will be lost.
- to reset the trouble codes, disconnect the automatic transmission and engine control unit connector.
- if the fault code has not been reset, then it will be stored in the memory of the control unit and will appear during subsequent diagnostics.
2. After resetting the codes, check that the flashing of the overdrive indicator should correspond to the normal condition of the gearbox.