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Home >> Isuzu Truck >> 1994 >> Trooper (4 Door) V6-3165cc 3.2L DOHC (6VD1) >> Repair and Diagnosis >> Powertrain Management >> Transmission Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> "Check Trans" Check

"Check Trans" Check





1. CASE it is ON during 2 to 3 seconds at ignition (or when the engine is cranked) but it is OFF after. The indicator is working normally GOTO DIAGNOSTIC CHECK.
2. CASE it is flashing and the flash is 0.2 seconds ON and 0.2 seconds OFF always when ignition is on (engine cranked or not). This means that there is a malfunction. GOTO DIAGNOSTIC CHECK.
3. CASE the CHECK TRANS indicator is flashing always and the flash is 0.4 seconds ON and 0.4 second OFF.






- This means that the Transmission Control Module (TCM) is in flashing code mode. This mode is only used for service. This mode is set when the Terminal 1 of diagnostic connector C-92 is set to ground. To go out of this mode:
- Check if terminal 1 of diagnostic connector C-92 is shorted to ground. (Voltage is about 0 volts when there is a short to ground instead of 5 volts).
- Check if TCM terminal D16 has the same problem.
- Remove the short circuit to ground due to wiring problems.
- IF problem solved: GOTO CHECK TRANS INDICATOR.
NO: GOTO TCM MEM-CAL REPLACEMENT.






4. CASE it is staying ON always when ignition is ON.
- This means that connection between the ramp and the TCM is shorted to ground.
- Verify if instrument panel terminal 4 of connector I-1 is shorted to ground.
- Verify if the TCM connector C-91 terminal C10 is shorted to ground.
- Verify that the instrument panel terminal 1 of connector I-1 is connected to Battery.
- IF problem solved: GOTO CHECK TRANS INDICATOR.
NO: GOTO TCM MEM-CAL REPLACEMENT.
5. CASE it is staying OFF with the ignition ON (engine OFF).
- This means that connection between the Lamp and the TCM is shorted to battery or opened.
- Verify if instrument panel terminal 4 of connector I-1 is shorted to battery or open.
- Verify if the TCM connector C-91 terminal C10 is shorted to battery or open.
- Verify that the instrument panel terminal 1 of connector I-1 is connected to Battery. If not check the Fuses and the connections (terminal 10 of connector H-25) voltage.
- IF problem solved: GOTO CHECK TRANS INDICATOR.
NO: GOTO TCM MEM-CAL REPLACEMENT.
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