DTC 27

DTC P1895 (No.27): Torque Reduction Signal Circuit Malfunction

Wiring Diagram










DTC Detecting Condition and Trouble Area






DTC Confirmation Procedure

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine and run it for 1 minute.
4) Check DTC, pending DTC and freeze frame data.

DTC Troubleshooting

1.
Was "A/T System Check" performed?
YES
Go to Step 2.
NO
Go to A/T System Check.

2. Check torque reduction signal circuit for open.

Turn ignition switch OFF.
Disconnect TCM and ECM connectors from TCM and ECM.
Check continuity between terminal "G07-18" of disconnected harness side TCM connector and terminal "G04-17" of disconnected harness side ECM connector.

Is continuity indicated?
YES
Go to Step 3.
NO
"LT GRN/RED" circuit open.

3. Check torque reduction signal circuit for ground short.

Check continuity between terminal "G07-18" of disconnected harness side TCM connector and ground.

Is continuity indicated?
YES
"LT GRN/RED" circuit shorted ground.
NO
Go to Step 4.

4. Check power supply from ECM.

Connect ECM connectors to ECM.
Turn ignition switch ON.
Measure voltage between terminal "G04-17" of connected harness side ECM connector and ground.

Is it 4 - 6 V?
YES
Intermittent trouble or faulty TCM or ECM.
Check for intermittent referring to Intermittent and Poor Connection Inspection.
If OK, substitute a known-good TCM or ECM and recheck.
NO
Faulty ECM.