Honda HR-V: DTC C1850-12 (44-12): Fail Safe Relay Stuck ON (AWD)
NOTE: Before you troubleshoot, review the General Troubleshooting Information
for the AWD with
intelligent control system.
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1. Problem verification:
- Turn the vehicle to the ON mode.
- Check the parameter(s) below with the HDS.
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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. AWD relay check:
- Turn the vehicle to the OFF (LOCK) mode.
- Remove the AWD relay, then test it.
Is the AWD relay OK?
YES
The AWD relay is OK. Go to step 3.
NO
Replace the AWD relay.
3. Shorted wire check (FSR line):
- Disconnect the following connector.
AWD control unit 24P connector
- Check for continuity between test points 1 and 2.
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Is there continuity?
YES
Repair a short to ground in the FSR wire between the AWD relay and the AWD
control unit.
NO
The FSR wire is OK. Go to step 4.
4. Shorted wire check (PWR line to power):
- Turn the vehicle to the ON mode.
- Measure the voltage between test points 1 and 2.
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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 PWR wire between the AWD relay and the AWD
control unit.
READ NEXT:
NOTE: Before you troubleshoot, review the General Troubleshooting Information
for the AWD with
intelligent control system.
1. Problem verification:
Start the engine.
Check the parameter(s) below
NOTE: Before you troubleshoot, review the General Troubleshooting Information
for the AWD with
intelligent control system.
1. Problem verification (with engine idling):
Turn the vehicle to the ON
NOTE: Before you troubleshoot, review the General Troubleshooting Information
for the AWD with
intelligent control system.
1. Problem verification (with engine idling):
Turn the vehicle to the OFF
SEE MORE:
Special Tools Required
Driver Handle, 40 mm I.D.
07746-0030100
Replacement
NOTE:
The tapered roller bearing and the tapered roller bearing outer race
should be replaced as a set.
Adjust the tapered roller bearing preload after replacing the tapered
roller bearing and the tapered
roller bea
Inspection
NOTE: Unless otherwise indicated, illustrations used in the procedure are for
2WD.
Warm Up TWC (WU-TWC)
1. WU-TWC - Remove - Refer to: Warm Up TWC Removal and Installation (KA/KC),
or Under-Floor
TWC Removal and Installation (KA/KC)
2. WU-TWC - Inspect
Using a flashlight (A) and plug