5A
DTC P1895 (No.27): Torque Reduction Signal Circuit Malfunction (M13A Model without VVT)
Wiring Diagram
1. TCM [A]: Terminal arrangement of TCM connector (M13 engine model with VVT) (viewed from harness side)
2. ECM [B]: Terminal arrangement of ECM connector (M13 engine model without VVT) (viewed from harness side)
DTC Detecting Condition and Trouble Area
DTC detecting condition Trouble area
Voltage of torque reduction signal circuit TCM terminal is low although TCM does not require ECM to reduce engine torque.
• Torque reduction signal circuit malfunction.
• TCM
• ECM
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories.
3) After 1 minute passed from turning ignition switch ON, check DTC.
Troubleshooting
Step Action YES NO
1
Was A/T System Check performed?
Go to Step 2.
Go to A/T System Check .
2
Check Torque Reduction Signal Circuit for Open.
1) Turn ignition switch OFF.
2) Disconnect TCM and ECM connectors from TCM and ECM.
3) Check continuity between terminal “E124-18” of disconnected harness side TCM connector and terminal “E113-12” of disconnected harness side ECM connector.
Is continuity indicated?
Go to Step 3.
“YEL” circuit open.
3
Check Torque Reduction Signal Circuit for Ground Short
Check continuity between terminal “E124-18” of disconnected harness side TCM connector and ground.
Is continuity indicated?
“YEL” circuit shorted to ground.
Go to Step 4.
4
Check Power Supply from ECM
1) Connect ECM connectors to ECM.
2) Turn ignition switch ON.
3) Measure voltage between terminal “E113-12” of connected harness side ECM connector and ground.
Is it 9 –14 V?
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.
Faulty ECM.