Jeep Grand Cherokee WK. Manual — part 416
B2122-IGNITION RUN CONTROL CIRCUIT LOW (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 (F102) Ignition Run Relay Control circuit for over 10 seconds,
this code will set.
Possible Causes
(F102) IGNITION RUN RELAY CONTROL CIRCUIT LOW
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 B2122-IGNITION RUN 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)
2.
IGNITION RUN RELAY SHORTED
Turn the ignition off.
Disconnect the Cluster C2 connector.
Remove the PDC fuse #13.
Measure the resistance between ground and the (F102) Ignition Run
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
8J - 38
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
WK
B2122-IGNITION RUN CONTROL CIRCUIT LOW (CONTINUED)
3.
(F102) IGNITION RUN RELAY CONTROL CIRCUIT SHORT TO GROUND
Disconnect the Junction Block C2 connector (on top of junction block).
Measure the resistance between ground and the (F102) Ignition Run
Relay Control circuit in the Cluster C2 connector.
Is the resistance below 1000.0 ohms?
Yes
>> Repair the (F102) Ignition Run 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
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
8J - 39
B2123-IGNITION RUN CONTROL CIRCUIT HIGH
8J - 40
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
WK
B2123-IGNITION RUN CONTROL CIRCUIT HIGH (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 (F102) Ignition Run Relay Control circuit for over 10 seconds,
this code will set.
Possible Causes
(F102) IGNITION RUN 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 B2123-IGNITION RUN 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.
IGNITION RUN RELAY SHORTED TO BATTERY
Turn the ignition off.
Disconnect the Cluster C2 connector.
Momentarily connect a jumper wire between the (F102) Ignition Run
Relay Control circuit and the (Z905) Ground circuit in the Cluster C2
connector.
Did the relay actuate?
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
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
8J - 41
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