DTC C1850-14 (AWD) (2019 2020 2021)
DTC C1850-14 : Fail Safe Relay Stuck OFF
NOTE: Before you troubleshoot, review the General Troubleshooting Information .
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| C1850-14 Fail Safe Relay Stuck OFF |
DTC (AWD)
- Problem verification (with engine idling)
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS.
-3. Turn the vehicle to the OFF (LOCK) mode.
-4. Start the engine.
-5. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame C1850-14 Fail Safe Relay Stuck OFF Is DTC C1850-14 indicated?
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.
- Fuse check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check the following fuse.
Fuse No. D5 Is the fuse OK?
YES
The fuse is OK. Reinstall the fuse, then go to step 3.
NO
Replace the fuse. If the fuse blows again, repair a short to ground in the No. D5 fuse circuit, then go to step 4.
- Open wire check (+B E-DPS line)
-1. Disconnect the following connector.
AWD control unit 24P connector -2. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF mode AWD control unit 24P connector: disconnected Test point 1 AWD control unit 24P connector No. 2 Test point 2 Body ground Is there battery voltage?
YES
The +B E-DPS wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good AWD control unit , then recheck. If this DTC goes away and the AWD control unit was substituted, replace the original AWD control unit .
NO
Repair an open in the +B E-DPS wire between the No. D5 fuse and the AWD control unit.
- Determine possible failure area (MH line, others)
-1. Disconnect the following connector.
AWD control unit 24P connector -2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode AWD control unit 24P connector: disconnected Test point 1 AWD control unit 24P connector No. 1 Test point 2 Body ground Is there continuity?
YES
Go to step 5.
NO
Go to step 6.
- Rear differential pump motor internal shorted check
-1. Disconnect the following connector.
Rear differential pump motor 2P connector -2. On the pump motor side, check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Rear differential pump motor 2P connector: disconnected AWD control unit 24P connector: disconnected Test point 1 Rear differential pump motor 2P connector (male terminals) No. 2 (pump motor side): Test point 2 Body ground Is there continuity?
YES
Replace the rear differential pump motor .
NO
The rear differential pump motor is OK. Repair a short to ground in the MH wires between the rear differential pump motor and the AWD control unit.
- Rear differential pump motor internal shorted check
-1. Disconnect the following connector.
Rear differential pump motor 2P connector -2. On the pump motor side, check for continuity between test points 1 and 2.
Test condition Vehicle OFF mode AWD control unit 24P connector: disconnected Rear differential pump motor 2P connector: disconnected Test point 1 Rear differential pump motor 2P connector (male terminals) No. 1 (pump motor side): Test point 2 Rear differential pump motor 2P connector (male terminals) No. 2 (pump motor side): Is there continuity?
YES
Replace the rear differential pump motor .
NO
The rear differential pump motor is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good AWD control unit , then recheck. If this DTC goes away and the AWD control unit was substituted, replace the original AWD control unit .