Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 831
4.
(X792) MICROPHONE IN (-) CIRCUIT OPEN
Measure the resistance of the (X792) Microphone IN (-) circuit between
the HFM connector and the inside rear view mirror connector.
Is the resistance below 5.0 ohms?
Yes
>> Go To 5
No
>> Repair the (X792) Microphone IN (-) circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
5.
(X712) (X722) (X792) MICROPHONE CIRCUITS SHORTED TO GROUND
Measure the resistance between ground and each (X712) (X722)
(X792) Microphone circuit.
Is the resistance below 100.0 ohms?
Yes
>> Repair the Microphone circuit that measured below 100.0
ohms for short to ground.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
No
>> Go To 6
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6.
(X712) (X722) (X792) MICROPHONE CIRCUITS SHORTED TO VOLTAGE
Turn the ignition on.
Measure the voltage of each (X712) (X722) (X792) Microphone circuit.
Is the voltage above 1.0 volt?
Yes
>> Repair the Microphone circuit that measured above 1.0 volt
for short to voltage.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
No
>> Go To 7
7.
(X712) (X722) (X792) MICROPHONE CIRCUITS SHORTED TOGETHER
Turn the ignition off.
Measure the resistance between each (X712) (X722) (X792) Micro-
phone circuit.
Is the resistance below 100.0 ohms?
Yes
>> Repair the Microphone circuit that measured below 100.0
ohms for a short together.
Perform BODY VERIFICATION TEST – VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
No
>> Go To 8
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NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
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8.
INSIDE REAR VIEW MIRROR
Replace the Inside Rear View Mirror in accordance with the service information.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per
cycle.
Attempt to make a phone call with the system.
With the scan tool, read the active DTC’s.
Does the scan tool display this DTC as active?
Yes
>> 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 BODY VERIFICATION TEST – VER 1).
No
>> Repair is complete.
Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1).
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B2203–ROM CHECKSUM PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module detects a fault during an internal diagnostic check.
Possible Causes
HANDS FREE MODULE
Diagnostic Test
1.
REPLACE THE HANDS FREE MODULE IF DTC IS ACTIVE
With the scan tool, read the active DTC’s.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per
cycle.
With the scan tool, read the active DTC’s.
Does the scan tool display this DTC as active?
Yes
>> Replace and program the Hands Free Module in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1).
No
>> If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness con-
nectors. Look for broken, bent, pushed out, or corroded terminals.
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