Jeep Grand Cherokee WK. Manual — part 530
U0024-CAN B BUS (-) CIRCUIT OPEN (CONTINUED)
For the Power Seat System circuit diagram (Refer to 8 - ELECTRICAL/POWER SEATS - SCHEMATICS AND DIA-
GRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously
•
Set Condition:
The Memory Seat Module detects the (D54) CAN B Bus (-) circuit is open.
Possible Causes
(D54) CAN B BUS (-) CIRCUIT OPEN
MEMORY SEAT MODULE
Theory of Operation
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase MSM DTC’s
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active MSM DTC’s.
Does the scan tool display this DTC as active?
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.
8N - 280
POWER SEATS - ELECTRICAL DIAGNOSTICS
WK
U0024-CAN B BUS (-) CIRCUIT OPEN (CONTINUED)
2.
(D54) CAN B BUS (-) CIRCUIT OPEN
Turn the ignition off.
Disconnect the Memory Seat Module C1 harness connector.
Measure the voltage between the (D54) CAN B Bus (-) circuit and
ground.
Is there any voltage present?
Yes
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace the Memory Seat Module in accor-
dance with the service information.
Perform POWER SEAT SYSTEM VERIFICATION TEST -
VER 1.
No
>> Repair the (D54) CAN B Bus (-) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
WK
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 281
U0025-CAN B BUS (-) CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0026-CAN B BUS (-) CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0141–LOST COMMUNICATION WITH FRONT CONTROL MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0151-LOST COMMUNICATION WITH OCCUPANT RESTRAINT CONTROLLER
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0154-LOST COMMUNICATION WITH OCCUPANT CLASSIFICATION MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0155-LOST COMMUNICATION WITH CLUSTER/CCN
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0156-LOST COMMUNICATION WITH EOM
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0159-LOST COMMUNICATION WITH PARKING ASSIST CONTROL MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
8N - 282
POWER SEATS - ELECTRICAL DIAGNOSTICS
WK
U0168-LOST COMMUNICATION WITH VEHICLE SECURITY CONTROL MODULE
(SKREEM/WCM)
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0169-LOST COMMUNICATION WITH SUNROOF CONTROL MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0181–LOST COMMUNICATION WITH HEADLAMP LEVEL TRANSLATOR
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0184-LOST COMMUNICATION WITH RADIO
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0186-LOST COMMUNICATION WITH AUDIO AMPLIFIER
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0195-LOST COMMUNICATION WITH SDARS
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0196-LOST COMMUNICATION WITH VEHICLE ENTERTAINMENT CONTROL
MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0197-LOST COMMUNICATION WITH HANDS FREE PHONE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
U0199-LOST COMMUNICATION WITH DRIVER DOOR MODULE
For a complete wiring diagram Refer to Section 8W.
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the diagnostic
test procedure.
WK
POWER SEATS - ELECTRICAL DIAGNOSTICS
8N - 283
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