DTC C1850-14 (44-50) (AWD) (2016 2017 2018)
DTC C1850-14 : Fail Safe Relay Stuck OFF
NOTE: Before you troubleshoot, review the General Troubleshooting Information for the AWD with intelligent control system .
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| C1850-14 Fail Safe Relay Stuck OFF |
DTC (AWD)
- Problem verification
-1. Start the engine.
-2. Check the parameter(s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit Voltage of Battery Less than 3.0 V 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.
- Fuse check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check the following fuse.
Fuse No. D2-6 (30 A) Location Auxiliary under-dash fuse box A Is the fuse OK?
YES
The fuse is OK. Reinstall the fuse, then go to step 3.
NO
Replace the fuse, and recheck. If the fuse blows again, repair a short to ground in the No. D2-6 (30 A) fuse circuit.
- AWD relay check
-1. Remove the AWD relay , then test it .
Is the AWD relay OK?
YES
The AWD relay is OK. Go to step 4.
NO
- Open wire check (+B E-DPS line)
-1. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode AWD relay: disconnected Test point 1 AWD relay 4P socket No. 1 Test point 2 Body ground Is there battery voltage?
YES
The +B E-DPS wire is OK. Go to step 5.
NO
Repair an open in the +B E-DPS wire between the AWD relay and the No. D2-6 (30 A) fuse in the auxiliary under-dash fuse box A.
- Open wire check (IG1 OPTION line)
-1. Turn the vehicle to the ON mode.
-2. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode AWD relay: disconnected Test point 1 AWD relay 4P socket No. 3 Test point 2 Body ground Is there battery voltage?
YES
The IG1 OPTION wire is OK. Go to step 6.
NO
Repair an open in the IG1 OPTION wire between the AWD relay and the No. C39 (30 A) fuse in the under-hood fuse/relay box.
- Shorted wire check (FSR 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.
Test condition Vehicle ON mode AWD relay: disconnected AWD control unit 24P connector: disconnected Test point 1 AWD control unit 24P connector No. 6 Test point 2 Body ground Is there about 0.1 V or less?
YES
The FSR wire is not shorted to power. Go to step 7.
NO
Repair a short to power in the FSR wire between the AWD relay and the AWD control unit, then replace the AWD control unit .
- Open wire check (FSR line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF mode AWD relay: disconnected AWD control unit 24P connector: disconnected Test point 1 AWD relay 4P socket No. 4 Test point 2 AWD control unit 24P connector No. 6 Is there continuity?
YES
The FSR wire is OK. Go to step 8.
NO
Repair an open in the FSR wire between the AWD relay and the AWD control unit.
- Open wire check (PWR line)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF mode AWD relay: disconnected AWD control unit 24P connector: disconnected Test point 1 AWD relay 4P socket No. 2 Test point 2 AWD control unit 24P connector No. 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 PWR wire between the AWD relay and the AWD control unit.