General information
1. The self-diagnosis function is built into the automatic transmission electronic control unit. With the help of the overdrive off indicator, the system can warn the driver of a malfunction in the automatic transmission. In addition, using this indicator, you can determine the code of the malfunction that has occurred.
Warning: Warning signals and fault codes can only be read when the overdrive switch is in the "ON". If the switch is in position "OFF", the indicator lamp lights up without blinking.
- A) If there is a malfunction in the speed sensor, throttle position sensor or solenoid valves, the indicator will flash, thereby warning the driver of the malfunction. But if there is a malfunction in the lock control solenoid valve and the lock quality control solenoid valve, there will be no malfunction warning.
- b) Fault codes can be read by the number of flashes of the overdrive indicator, for this you need to short the outputs "THOSE1" And "E1" diagnostic socket.
- V) The diagnostic system does not determine the failure of the throttle position sensor and brake light switch, but they can be checked by checking the voltage at the contact "TT" diagnostic socket.
Models up to 1996 | Models since 1996 |
- G) The signals in each gear can be checked by measuring the voltage at the pin "TT" in the process of movement.
2. The fault code is stored in the memory of the control unit even after the engine is turned off. Block memory clearing (reset codes after repair) done either by turning off the ignition and disconnecting the fuse "EFI", or by disconnecting the connector of the automatic transmission and engine control unit.
A240E, A241E, A241L | Models since 1996 |
Attention:
- Low battery voltage may cause diagnostic failure. Therefore, before starting diagnostics, check the battery.
- Use a voltmeter or ohmmeter that has a scale limit of at least 10 kΩ/V.