DTC C1851-1E: Motor Circuit High Current
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| C1851-1E Motor Circuit High Current |
- Problem verification (with idling):
- 1. Turn the ignition switch to ON (II).
- 2. Clear the DTC with the HDS.
- 3. Start the engine.
- 4. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame C1851-1E Motor Circuit High Current
Is DTC C1851-1E indicated?
YES : The failure is duplicated. Go to step 3.
NO : Go to step 2.
- Problem verification (motor running):
- 1. Clear the DTC with the HDS.
- 2. With the engine running, DO THE AIR BLEEDING IN THE ADJUSTMENT MENU WITH THE HDS .
- 3. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame C1851-1E Motor Circuit High Current
Is DTC C1851-1E indicated?
YES : The failure is duplicated. Go to step 3.
NO : Intermittent failure, the system is OK at this time.
- Determine possible failure area (short in MH, ML lines to power, others):
- 1. Turn the ignition switch to LOCK (0).
- 2. Disconnect the following connector.
Rear differential pump motor 2P connector
- 3. Turn the ignition switch to ON (II).
- 4. Wait for 10 seconds.
- 5. Measure the voltage between the following test points and body ground individually.
Test condition IG ON (II)
Rear differential pump motor 2P connector: disconnected
Connector Test circuit Terminal Rear differential pump motor 2P ML No. 1 (BLK) MH No. 2 (RED)
Is there about 0.1 V or less?
YES : Go to step 5.
NO : Go to step 4.
- Shorted wire check (MH line to power, ML line to power):
- 1. Turn the ignition switch to LOCK (0).
- 2. Disconnect the following connector.
Real time AWD control unit 24P connector
- 3. Turn the ignition switch to ON (II).
- 4. Measure the voltage between the following test points and body ground individually.
Test condition IG ON (II)
Rear differential pump motor 2P connector: disconnected
Real time AWD control unit 24P connector: disconnected
Connector Test circuit Terminal Rear differential pump motor 2P ML No. 1 (BLK) MH No. 2 (RED)
Is there about 0.1 V or less?
YES : Update the real time AWD control unit if it does not have the latest software See REAL TIME AWD CONTROL UNIT REMOVAL AND INSTALLATION or REAL TIME AWD CONTROL UNIT UPDATE , or substitute a known-good real time AWD control unit See REAL TIME AWD CONTROL UNIT REMOVAL AND INSTALLATION or REAL TIME AWD CONTROL UNIT UPDATE , and recheck. If the symptom/indication goes away with the updated real time AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good real time AWD control unit, replace the original real time AWD control unit See REAL TIME AWD CONTROL UNIT REMOVAL AND INSTALLATION or REAL TIME AWD CONTROL UNIT UPDATE .
NO : Repair short to power in the MH and/or ML wires between the rear differential pump motor and the real time AWD control unit.
- Shorted wire check (MH line to ML line):
- 1. Turn the ignition switch to LOCK (0).
- 2. Disconnect the following connector.
Real time AWD control unit 24P connector
- 3. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Rear differential pump motor 2P connector: disconnected
Real time AWD control unit 24P connector: disconnected
Test circuit MH, ML
Test point 1 Rear differential pump motor 2P connector No. 1 (BLK)
Test point 2 Rear differential pump motor 2P connector No. 2 (RED)
Is there continuity?
YES : Repair a short in the MH wire to the ML wire between rear differential pump motor connectors No. 1 and No. 2.