Jeep Grand Cherokee WK. Manual — part 424
B162F-RIGHT 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
(L44) RIGHT LOW BEAM CONTROL CIRCUIT
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: B162F-RIGHT 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.
(L44) RIGHT LOW BEAM CONTROL CIRCUIT
Turn the ignition off.
Disconnect the FCM C2 harness connector.
Disconnect the Right Headlamp harness connector.
Measure the resistance between ground and the (L44) Right Low
Beam Control circuit.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (L44) Right 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 - 6
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
WK
B1630-RIGHT LOW BEAM CONTROL CIRCUIT HIGH
WK
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 7
B1630-RIGHT LOW BEAM CONTROL CIRCUIT HIGH (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
•
With the Headlamps activated.
•
Set Condition:
•
When the FCM detects a HIGH condition.
Possible Causes
(L44) RIGHT LOW BEAM CONTROL CIRCUIT SHORTED TO GROUND
RIGHT LOW BEAM BULB
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: B1630-RIGHT LOW BEAM CONTROL 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.
RIGHT LOW BEAM BULB
Turn the ignition off.
Inspect the Right Low Beam Bulb Assembly.
Is the inoperative bulb OK?
Yes
>> Go To 3
No
>> Replace the Inoperative bulb in accordance with the service information.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES - STANDARD PROCEDURE)
8L - 8
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
WK
B1630-RIGHT LOW BEAM CONTROL CIRCUIT HIGH (CONTINUED)
3.
(L44) RIGHT LOW BEAM CONTROL CIRCUIT
Turn the ignition off.
Disconnect the FCM C2 harness connector.
Measure the resistance of the (L44) Right Low Beam Control circuit.
Is the resistance above 5.0 ohms?
Yes
>> Repair the (L44) Right Low Beam Control circuit for an
open 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)
WK
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 9
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