Jeep Liberty KJ. Manual - part 336
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module detects voltage between 3.5 volts and 4.0 volts on the (X730) Voice Recognition/
Phone Switch Signal circuit for more than 30 seconds.
Possible Causes
AUTOMATIC DAY/NIGHT MIRROR
HANDS FREE MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTCS
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.
While monitoring the VR Phone Switch voltage, momentarily connect a
jumper wire between (X730) Voice Recognition/Phone Switch Signal cir-
cuit and ground.
NOTE: The sensor voltage should switch from above 4.7 volts
when the jumper is not connected to below 0.6 volts when the
jumper is connected.
Does the sensor voltage switch from above 4.7 volts to below
0.6 volt as described?
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
>> 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).
8T - 66
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
KJ