Honda HR-V: DTC Troubleshooting C1852-18 (62-01): Solenoid Valve Circuit Low Current (AWD)

NOTE: Before you troubleshoot, review the General Troubleshooting Information.

1. Problem verification (with engine idling):

1. Turn the vehicle to the ON mode.
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check for DTCs with the HDS.

Is DTC C1852-18 indicated?

YES

The failure is duplicated. Go to step 3.

NO

Go to step 2.

2. Problem verification (with rear differential pump motor running):

1. Clear the DTC with the HDS.
2. Select the ADJUSTMENT in the AWD WITH INTELLIGENT CONTROL with the HDS.
3. With the engine running, do the AIR BLEEDING in the ADJUSTMENT with the HDS.
4. Check for DTCs with the HDS.

Is DTC C1852-18 indicated?

YES

The failure is duplicated. Go to step 3.

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.

3. Determine possible failure area (GND line, others):

Check for continuity between test points 1 and 2.

Is there continuity?

YES

Go to step 6.

NO

Go to step 4.

4. Open wire check (GND line):

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

AWD control unit 24P connector

3. Check for continuity between the following test points 1 and 2 individually (see table).

Is there continuity?

YES

The GND wires are OK. Go to step 5.

NO

Repair an open in the GND wires between AWD control unit and ground (G505).

5. Open wire check (DG line):

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

Check for poor connections or loose terminals between the AWD control unit and the rear differential body ground (G701). If the connections are OK, repair an open in the DG wire between the rear differential body and the AWD control unit.

6. Determine possible failure area (DTYH line, others):

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

Rear differential solenoid valve 1P connector

3. Turn the vehicle to the ON mode.
4. Wait for 10 seconds.
5. Measure the voltage between test points 1 and 2.

Is there about 0.1 V or less?

YES

Go to step 8.

NO

Go to step 7.

7. Shorted wire check (DTYH 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 0.1 V or less?

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 a short to power in the DTYH wire between the rear differential solenoid valve and the AWD control unit.

8. Rear differential solenoid valve check:

1. Turn the vehicle to the OFF (LOCK) mode.
2. On the solenoid valve side, measure the resistance between test points 1 and 2.

Is there about 100 Ω or less?

YES

The rear differential solenoid valve is OK. Go to step 9.

NO

Replace the rear differential solenoid valve.

9. Shorted wire check (DTYH line):

1. Disconnect the following connector.

AWD control unit 24P connector

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

Is there continuity?

YES

Repair a short to ground in the DTHY wire between the rear differential solenoid valve and the AWD control unit.

NO

The DTYH wire is not shorted. Go to step 10.

10. Open wire check (DTYH line):

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 DTYH wire between the rear differential solenoid valve and the AWD control unit.

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