Jeep Grand Cherokee WK. Manual — part 436
B166B-LEFT TRAILER TOW LAMP CONTROL CIRCUIT LOW
8L - 54
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
WK
B166B-LEFT TRAILER TOW LAMP CONTROL CIRCUIT LOW (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
•
With the Trailer Tow Lamps activated.
•
Set Condition:
•
When the FCM detects a LOW condition.
Possible Causes
INTEGRATED POWER MODULE
Diagnostic Test
1.
INTEGRATED POWER MODULE
Turn the ignition off.
Replace the Trailer Tow Left Turn relay with and known good relay.
With the Scan Tool, clear all IPM DTC’s.
Activate the Left Turn Signal.
With the Scan Tool, read the Wiper DTC’s.
Does the Scan Tool read: B166B-LEFT TRAILER TOW LAMP CONTROL CIRCUIT LOW?
Yes
>> Replace the Integrated Power 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
>> Test complete.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
WK
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 55
B166C-LEFT TRAILER TOW LAMP CONTROL CIRCUIT HIGH
8L - 56
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
WK
B166C-LEFT TRAILER TOW LAMP CONTROL CIRCUIT HIGH (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
•
With the Trailer Tow Lamps activated.
•
Set Condition:
•
When the FCM detects a HIGH condition.
Possible Causes
INTEGRATED POWER MODULE
Diagnostic Test
1.
INTEGRATED POWER MODULE
Turn the ignition off.
Replace the Trailer Tow Left Turn relay with and known good relay.
With the Scan Tool, clear all IPM DTC’s.
Activate the Left Turn Signal.
With the Scan Tool, read the Wiper DTC’s.
Does the Scan Tool read: B166C-LEFT TRAILER TOW LAMP CONTROL CIRCUIT HIGH?
Yes
>> Replace the Integrated Power 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
>> Test complete.
Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
WK
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 57
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