Jeep Grand Cherokee WK. Manual - part 440
B168F-FRONT FOG LAMP SWITCH STUCK (SCM)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the Fog Lamps on.
•
Set Condition:
When the CCN detects a Fog Lamp Switch Stuck message on the BUS.
Possible Causes
LIGHTING MULTIFUNCTION SWITCH
STEERING CONTROL MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase DTC’s
Operate the Fog Lamp Switch several times.
Turn the ignition on and wait 30 seconds.
With the scan tool, read DTC’s.
Does the scan tool display: B168F-FRONT FOG LAMP SWITCH STUCK?
Yes
>> Go To 2
No
>> The conditions that caused this code to set are not present at this time. Using the wiring diagram/sche-
matic as a guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST – VER 1.
2.
LIGHTING MULTIFUNCTION SWITCH
Turn the ignition off.
Using the correct service procedure, remove the Lighting Multi-Function Switch.
Measure the internal resistance of the Multifunction Switch between cavities 4 and 5. Move the switch position from
OFF to AUTO WITH FOG while measuring.
OFF = OPEN
OFF WITH FOG = 1047 ohms
PARK WITH FOG = 383 ohms
HEAD WITH FOG = 173 ohms
AUTO WITH FOG = 0 ohms
Is the resistance in each position correct?
Yes
>> Replace the Steering Control Module in accordance with the service information.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
No
>> Replace the Multifunction Switch in accordance with the service information.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
8L - 70
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
WK