- A) Turn on the ignition. Do not start the engine.
- b) Connect a voltmeter to the diagnostic connector "TT" And "E1".
Models up to 1996 | Models since 1996 |
- V) While gently depressing the accelerator pedal, check the voltage change. If the voltage does not change as shown in the figure, then the sensor or its circuit is faulty.
Models up to 1996 | Models since 1996 |
2. Check the purpose of the brake light switch.
- A) Fully depress the accelerator pedal voltage at the contact "TT" should make up. Voltage
- pre-1996 models: 6 V
- models since 1996: 8 V
- b) Press the brake pedal and check the voltage at the contact "TT". Voltage:
- brake pedal depressed: 0 V.
- brake pedal released: pre-1996 models: 6 V; models since 1996: 8 V.
- V) If there is a deviation from the specified voltages, then there is a malfunction in the brake light switch circuit.
3. Check upshift timing.
- A) Warm up the engine to a coolant temperature of 80°C.
- b) Set the overdrive switch to "ON".
- V) Set the selector to position "D" and the automatic transmission mode switch to the position "NORMAL".
- G) During road test (speed over 10 km/h) check the voltage change at the output "TT" connector of the automatic transmission control unit and the engine during upshifts.
- d) If the voltage rises from 0 V to 7 V, then everything is normal.
Models up to 1996
0 B | First gear | |
2 V | Second gear | |
4 B | third gear | |
5 V | Third gear with torque converter lockup (only A241E) | |
6 V | overdrive | |
7 V | Overdrive with torque converter lockup |
A245E
0 V | First gear |
1 V | Second gear |
2 V | third gear |
3 V | 3rd gear with slip-controlled torque converter lock-up clutch |
4 V | Third gear with torque converter lockup |
5 V | overdrive |
6 V | Overdrive with slip-controlled torque converter lock-up clutch |
7 V | Overdrive with torque converter lockup |
Models since 1996 (A540N, A241E)
0 B | First gear |
2 V | Second gear |
3 V | Second gear with torque converter lockup |
4 V | third gear |
5 V | Third gear with torque converter lockup |
6 V | overdrive |
7 V | Overdrive with torque converter lockup |
Note: Shifting to the next gear can be detected by a slight jolt or change in engine speed.