Jeep Liberty KJ. Manual — part 337
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module detects voltage below 0.6 volts on the (X730) Voice Recognition/Phone Switch Signal
circuit.
Possible Causes
(X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORT TO (X835) SENSOR GROUND
CIRCUIT
(X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORT TO GROUND
AUTOMATIC DAY/NIGHT MIRROR
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.
CHECK THE VOLTAGE OF THE (X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL
Turn the ignition off.
Disconnect the Automatic Day/Night Mirror C2 harness connector.
Turn the ignition on.
With the scan tool, monitor the VR Phone Switch voltage.
Is the voltage above 4.7 volts?
Yes
>> Replace the Automatic Day/Night Mirror in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
No
>> Go To 3
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NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
KJ
3.
(X730) VOICE/RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO THE (X835) SENSOR
GROUND CIRCUIT
Turn the ignition off.
Disconnect the Hands Free Module C1 harness connector.
Measure the resistance between the (X730) Voice Recognition/Phone
Switch Signal circuit and the (X835) Sensor Ground circuit.
Is the resistance below 100.0 ohms?
Yes
>> Repair the (X730) Voice Recognition/Phone Switch Signal
circuit for a short to the (X835) Sensor Ground circuit.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL MODULES
-
STANDARD PROCEDURE).
No
>> Go To 4
4.
(X730) VOICE/RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (X730) Voice Recog-
nition/Phone Switch Signal circuit.
Is the resistance below 100.0 ohms?
Yes
>> Repair the (X730) Voice Recognition/Phone Switch Signal
circuit for a short to ground.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL MODULES
-
STANDARD PROCEDURE).
No
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, 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).
KJ
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
8T - 71
VOICE RECOGNITION/PHONE SWITCH CIRCUIT SHORT TO VOLTAGE
For a complete wiring diagram Refer to Section 8W.
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NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
KJ
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module detects voltage above 4.7 volts on the (X730) Voice Recognition/Phone Switch Signal
circuit.
Possible Causes
(X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORT TO VOLTAGE
(X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT OPEN
(X835) SENSOR GROUND CIRCUIT OPEN
AUTOMATIC DAY/NIGHT MIRROR
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.
CHECK THE VOLTAGE OF THE (X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL
Turn the ignition off.
Disconnect the Automatic Day/Night Mirror C2 harness connector.
Turn the ignition on.
Measure the voltage of the (X730) Voice Recognition/Phone Switch Sig-
nal circuit.
Is the voltage above 5.3 volts?
Yes
>> Repair the (X730) Voice Recognition/Phone Switch Signal
circuit for a short to voltage.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL MODULES
-
STANDARD PROCEDURE).
No
>> Go To 3
KJ
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
8T - 73
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