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DTC C1118 (82)

BME040200000W18

  Caution

  • When attaching the tester lead to the ABS/TCS HU/CM harness connector, the SST (49 G066 001) must be used. (See ABS/TCS HU/CM INSPECTION.)

DTC | C1118 (82) | Engine control system, Torque reduction request signal line
DETECTION CONDITION | • After engine is warmed up, the signal that indicates torque reduction signal malfunction or engine control system malfunction is sent from PCM.
POSSIBLE CAUSE | • Malfunction of engine control system • Malfunction of related wiring harness

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT FOR DTCs IN PCM • Turn ignition key to OFF. • Connect WDS or equivalent to DLC-2. • Turn ignition key to ON (engine OFF). • Is DTC for engine control system obtained?
(See DTC TABLE [L3])
Yes
Follow inspection procedures for engine control system.
No | Go to next step.
2 | VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN TERMINAL R AND AA OF ABS/TCS HU/CM) • Turn ignition key to OFF. • Connect ABS/TCS HU/CM connector. • Connect SST (adapter harness) to ABS/TCS HU/CM connector (harness side and ABS/TCS HU/CM side).
• Turn ignition key to ON (engine OFF).
• Measure voltage between terminal R and AA of SST (adapter harness).

Voltage

5 V

• Is voltage as specified?
Yes
Go to Step 5.
No | Go to next step.
3 | INSPECT WIRING HARNESS BETWEEN ABS/TCS HU/CM AND PCM FOR CONTINUITY • Turn ignition key to OFF. • Disconnect SST (adapter harness) from ABS/TCS HU/CM (ABS/TCS HU/CM side) • Disconnect PCM connector. • Inspect for continuity between terminal R of SST (adapter harness) and terminal 2F of PCM connector (harness side).
• Is there continuity?
Yes
Go to next step.
No | Repair or replace harness then go to Step 6.
4 | INSPECT WIRING HARNESS BETWEEN TERMINAL R OF ABS/TCS HU/CM AND GROUND FOR SHORT TO GROUND • Inspect for continuity between terminal R of SST (adapter harness) and ground. • Is there continuity? | Yes | Repair or replace harness, then go to Step 6.
No | Replace PCM, then go to Step 6.
5 | INSPECT VOLTAGE PATTERN AT TERMINAL R OF ABS/TCS HU/CM • Connect PCM connector and SST (adapter harness) to ABS/TCS HU/CM (ABS/TCS HU/CM side). • Turn ignition key to ON. • Inspect voltage pattern at ABS/TCS HU/CM terminal R using oscilloscope. | Yes | Go to next step.
No | Replace ABS/TCS HU/CM, then go to next step.
• Is voltage pattern as specified?
6 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from memory. (See Clearing DTCs Procedure) • Is the same DTC present? | Yes | Replace ABS/TCS HU/CM, then go to next step.
No | Go to next step.
7 | VERIFY AFTER REPAIR PROCEDURE • Is there any DTC present? | Yes | Go to applicable DTC inspection.
No | Troubleshooting completed.