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)
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LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
WK
B1607-HEADLAMP SWITCH INPUT CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
•
With the ignition on.
•
Set Condition:
•
The SCM detects a low condition.
Possible Causes
LIGHTING MULTIFUNCTION SWITCH
STEERING CONTROL MODULE
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all CCN DTC’s.
Turn the Headlamps on.
With the Scan Tool, read the DTC information.
Does the Scan Tool read: B1607-HEADLAMP SWITCH INPUT CIRCUIT LOW?
Yes
>> Go To 2
No
>> The condition that caused the symptom is currently not present. Inspect the related wiring for a possible
intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
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 7. Move the switch position from
OFF to AUTO while measuring.
OFF = 1047 ohms
PARK LAMP = 383 ohms
HEADLAMP = 195 ohms
AUTO = 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)
WK
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 71
B1608-HEADLAMP SWITCH INPUT CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
•
With the ignition on.
•
Set Condition:
•
The SCM detects a high condition.
Possible Causes
LIGHTING MULTIFUNCTION SWITCH
STEERING CONTROL MODULE
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all CCN DTC’s.
Turn the Headlamps on.
With the Scan Tool, read the DTC information.
Does the Scan Tool read: B1608-HEADLAMP SWITCH INPUT CIRCUIT HIGH?
Yes
>> Go To 2
No
>> The condition that caused the symptom is currently not present. Inspect the related wiring for a possible
intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
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 7. Move the switch position from
OFF to AUTO while measuring.
OFF = 1047 ohms
PARK LAMP = 383 ohms
HEADLAMP = 195 ohms
AUTO = 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)
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LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
WK
B16A7-HIGH BEAM CAMERA ALIGNMENT PERFORMANCE- LEFT
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The DTC will be set if the target light source is not within the correctable limits of the mirror.
Possible Causes
SMART BEAM CALIBRATION
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase DTC’s
Does the scan tool display: B16A7-HIGH BEAM CAMERA ALIGNMENT PERFORMANCE- LEFT?
Yes
>> Perform Smart Beam Calibration. (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/SMART-
BEAM - STANDARD PROCEDURE)
No
>> Test complete.
WK
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 73
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