Jeep Grand Cherokee WK. Manual — part 423
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
DIAGNOSIS AND TESTING
8L - 2
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
WK
B162B-LEFT LOW BEAM CONTROL CIRCUIT LOW
WK
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 3
B162B-LEFT LOW BEAM CONTROL CIRCUIT LOW (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
•
With the Headlamps activated.
•
Set Condition:
•
When the FCM detects a LOW condition.
Possible Causes
(L43) LEFT LOW BEAM CONTROL CIRCUIT SHORT TO GROUND
FRONT CONTROL MODULE
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all FCM DTC’s.
Turn the Headlamps on.
With the Scan Tool read the DTC information.
Does the Scan Tool read: B162B-LEFT LOW BEAM CONTROL 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.
(L43) LEFT LOW BEAM CONTROL CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the FCM C2 harness connector.
Disconnect the Left Headlamp harness connector.
Measure the resistance between ground and the (L43) Left Low Beam
Control circuit.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (L43) Left Low Beam Control circuit for a short
to ground condition.
Perform the BODY VERIFICATION TEST - VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES
- STANDARD PROCEDURE)
No
>> Replace the Front Control Module (FCM) in accordance
with the service information.
Perform the BODY VERIFICATION TEST - VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES
- STANDARD PROCEDURE)
8L - 4
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
WK
B162F-RIGHT LOW BEAM CONTROL CIRCUIT LOW
WK
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 5
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