Honda HR-V: DTC C1841-13 (42-01): Differential Fluid Temperature Sensor Circuit High Voltage (AWD)

NOTE: Before you troubleshoot, review the General Troubleshooting Information for the AWD with intelligent control system.

1. Problem verification:

1. Turn the vehicle to the ON mode.
2. Check the parameter(s) below with the HDS.

Do the current condition(s) match the threshold?

YES

The failure is duplicated. Go to step 2.

NO

Intermittent failure, the system is OK at this time. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.

2. Determine possible failure area (short to power in TOH line, others):

1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connector.

Rear differential fluid temperature sensor 2P connector

3. Turn the vehicle to the ON mode.
4. Measure the voltage between test points 1 and 2.

Is there about 4.9 V or more?

YES

Go to step 7.

NO

Go to step 3.

3. Determine possible failure area (open in TOH line, others):

1. Turn the vehicle to the OFF (LOCK) mode.
2. Connect terminals A and B with a jumper wire.

3. Turn the vehicle to the ON mode.
4. Check the parameter(s) below with the HDS.

Do the current condition(s) match the threshold?

YES

Go to step 5.

NO

Go to step 4.

4. Open wire check (TOH line):

1. Turn the vehicle to the OFF (LOCK) mode.
2. Remove the jumper wire.
3. Disconnect the following connector.

AWD control unit 24P connector

4. Check for continuity between test points 1 and 2.

Is there continuity?

YES

Update the AWD control unit if it does not have the latest software, or substitute a known-good AWD control unit, and recheck. If the symptom/indication goes away with the updated AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good AWD control unit, replace the original AWD control unit.

NO

Repair an open in the TOH wire between the rear differential fluid temperature sensor and the AWD control unit.

5. Rear differential fluid temperature sensor check:

1. Turn the vehicle to the OFF (LOCK) mode.
2. Remove the jumper wire.
3. Connect terminals A and B with a jumper wire.

4. Turn the vehicle to the ON mode.
5. Check the parameter(s) below with the HDS.

Do the current condition(s) match the threshold?

YES

Replace the rear differential fluid temperature sensor.

NO

The rear differential fluid temperature sensor is OK. Go to step 6.

6. Open wire check (TOL line):

1. Turn the vehicle to the OFF (LOCK) mode.
2. Remove the jumper wire.
3. Disconnect the following connector.

AWD control unit 24P connector

4. Check for continuity between test points 1 and 2.

Is there continuity?

YES

Update the AWD control unit if it does not have the latest software, or substitute a known-good AWD control unit, and recheck. If the symptom/indication goes away with the updated AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good AWD control unit, replace the original AWD control unit.

NO

Repair an open in the TOL wire between the rear differential fluid temperature sensor and the AWD control unit.

7. Shorted wire check (TOH line to power):

1.  Turn the vehicle to the OFF (LOCK) mode.
2.  Disconnect the following connector.

AWD control unit 24P connector

3. Turn the vehicle to the ON mode.
4. Measure the voltage between test points 1 and 2.

Is there about 0.5 V or more?

YES

Repair a short to power in the TOH wire between the rear differential fluid temperature sensor and the AWD control unit.

NO

Update the AWD control unit if it does not have the latest software, or substitute a known-good AWD control unit, and recheck. If the symptom/indication goes away with the updated AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good AWD control unit, replace the original AWD control unit.

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