Jeep Grand Cherokee WK. Manual — part 474
B182D–ALL DOOR LOCK CONTROL CIRCUIT LOW– CLUSTER (CONTINUED)
For the Power Door Lock circuit diagram (Refer to 8 - ELECTRICAL/POWER LOCKS - SCHEMATICS AND DIA-
GRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously
•
Set Condition:
When the Cluster senses a low condition on the (P777) Door Lock Relay Control circuit for over 10 seconds,
this code will set.
Possible Causes
(P777) DOOR LOCK RELAY CONTROL CIRCUIT SHORT TO GROUND
JUNCTION BLOCK
INSTRUMENT CLUSTER
Theory of Operation
If the (P777) Door Lock Relay Control circuit has been shorted to ground for any length of time, the door latch
solenoids are probably damaged. Check all the door latches after the short is repaired..
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase DTC’s
Operate the door locks several times.
Cycle the ignition from on to off.
Turn the ignition on.
With the scan tool, read DTC’s.
Does the scan tool display ALL DOOR LOCK RELAY CONTROL CIRCUIT LOW?
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 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
8N - 56
POWER LOCKS - ELECTRICAL DIAGNOSTICS
WK
B182D–ALL DOOR LOCK CONTROL CIRCUIT LOW– CLUSTER (CONTINUED)
2.
DOOR LOCK RELAY SHORTED
Turn the ignition off.
Disconnect the Cluster C2 connector.
Remove the PDC fuse #13.
Measure the resistance between ground and the (P777) Door Lock
Relay Control circuit in the Cluster C2 connector
Is the resistance below 1000.0 ohms?
No
>> Replace the Instrument Cluster in accordance with service
information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)
Yes
>> Go To 3
3.
(P777) DOOR LOCK RELAY CONTROL CIRCUIT SHORT TO GROUND
Disconnect the Junction Block C2 connector (on top of junction block).
Measure the resistance between ground and the (P777) Door Lock
Relay Control circuit in the Cluster C2 connector.
Is the resistance below 1000.0 ohms?
Yes
>> Repair the (P777) Door Lock Relay Control circuit for a
short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)
No
>> Replace the Junction Block in accordance with service
information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)
WK
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 57
B182E–ALL DOOR LOCK CONTROL CIRCUIT HIGH– CLUSTER
8N - 58
POWER LOCKS - ELECTRICAL DIAGNOSTICS
WK
B182E–ALL DOOR LOCK CONTROL CIRCUIT HIGH– CLUSTER (CONTINUED)
For the Power Door Lock circuit diagram (Refer to 8 - ELECTRICAL/POWER LOCKS - SCHEMATICS AND DIA-
GRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously
•
Set Condition:
When the Cluster senses a high condition on the (P777) Door Lock Relay Control circuit for over 10 seconds,
this code will set.
Possible Causes
(P777) DOOR LOCK RELAY CONTROL CIRCUIT SHORT TO BATTERY
JUNCTION BLOCK
INSTRUMENT CLUSTER
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase DTC’s
Operate the door locks several times.
Cycle the ignition from on to off.
Turn the ignition on.
With the scan tool, read DTC’s.
Does the scan tool display ALL DOOR LOCK RELAY CONTROL CIRCUIT HIGH?
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 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
2.
DOOR LOCK RELAY SHORTED TO BATTERY
NOTE: Ensure the doors are unlocked and the windows down
before proceeding.
Turn the ignition off.
Disconnect the Cluster C2 connector.
Momentarily connect a jumper wire between the (P777) Door Lock
Relay Control circuit and the (Z905) Ground circuit in the Cluster C2
connector.
Did the doors lock?
Yes
>> Replace the Instrument Cluster in accordance with service
information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
- ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)
No
>> Go To 3
WK
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 59
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