Jeep Liberty KJ. Manual — part 323
IGNITION POWER MESSAGE NOT RECEIVED
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module does not receive an ignition power status message from the Body Control Module
(BCM).
Possible Causes
LOST COMMUNICATION WITH BODY CONTROL MODULE (BCM)
HANDS FREE MODULE
Diagnostic Test
1.
ATTEMPT TO COMMUNICATE WITH THE BODY CONTROL MODULE (BCM)
Turn the ignition on.
With the scan tool, attempt to communicate with the BCM.
Was the scan tool able to communicate with the BCM?
Yes
>> Go To 2
No
>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) and
perform the related symptom.
2.
ERASE DTC AND ATTEMPT TO RESET
With the scan tool, erase the HFM DTC’s.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the scan tool, read the HFM DTC’s.
Did this DTC reset?
Yes
>> Replace and program the Hands Free Module in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No
>> The condition that set this DTC is no longer present. Using the wiring diagram/schematic as a guide,
inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con-
nectors for broken, bent, pushed out, and corroded terminals.
8T - 14
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
KJ
INVALID BODY STYLE
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module receives an invalid body style message from the PCM.
Possible Causes
LOST COMMUNICATION WITH PCM
PCM NOT ACTIVE ON THE BUS NETWORK
HANDS FREE MODULE
Diagnostic Test
1.
ATTEMPT TO COMMUNICATE WITH THE PCM
Turn the ignition on.
With the scan tool, attempt to communicate with the PCM.
Was the scan tool able to communicate with the PCM?
Yes
>> Go To 2
No
>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) and
perform the related symptom.
2.
CHECK PCM ACTIVITY ON THE BUS NETWORK
With the scan tool, select System Monitors then J1850 Module Scan.
Does the scan tool indicated that the PCM is present or active on the bus network?
Yes
>> Go To 3
No
>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) and
perform the related symptom.
3.
ERASE DTC AND ATTEMPT TO RESET
With the scan tool, erase the HFM DTC’s.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the scan tool, read the HFM DTC’s.
Did this DTC reset?
Yes
>> Replace and program the Hands Free Module in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No
>> The condition that set this DTC is no longer present. Using the wiring diagram/schematic as a guide,
inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con-
nectors for broken, bent, pushed out, and corroded terminals.
KJ
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
8T - 15
LEFT AUDIO INPUT SHORT TO GROUND
For a complete wiring diagram Refer to Section 8W.
8T - 16
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
KJ
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module detects low voltage on the (X41) Audio MUX Left circuit.
Possible Causes
(X41) AUDIO MUX LEFT CIRCUIT OPEN
(X41) AUDIO MUX LEFT CIRCUIT SHORT TO GROUND
(X140) AUDIO RETURN CIRCUIT OPEN
(X41) AUDIO MUX LEFT CIRCUIT SHORT TO (X140) AUDIO RETURN CIRCUIT
HANDS FREE MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTC
Turn the ignition on.
With the scan tool, erase the HFM DTCs.
Attempt to make a phone call using the system.
With the scan tool, read the HFM DTCs.
Did this DTC reset?
Yes
>> Go To 2
No
>> The condition that set this DTC is no longer present. Using the wiring diagram/schematic as a guide,
inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con-
nectors for broken, bent, pushed out, and corroded terminals.
2.
(X41) AUDIO MUX LEFT CIRCUIT OPEN
Turn the ignition off.
Disconnect the Hands Free Module harness connector.
Disconnect the Radio C2 harness connector.
Measure the resistance of the (X41) Audio MUX Left circuit between the
HFM connector and the radio connector.
Is the resistance below 5.0 ohms?
Yes
>> Go To 3
No
>> Repair the (X41) Audio MUX Left circuit for an open
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL MODULES
-
STANDARD PROCEDURE).
KJ
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
8T - 17
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