Chrysler PT Cruiser. Manual — part 85
Symptom List:
LEFT AUDIO INPUT SHORT TO GROUND
LEFT AUDIO INPUT SHORT TO VOLTAGE
LEFT AUDIO OUTPUT 1 SHORT TO GROUND
LEFT AUDIO OUTPUT 1 SHORT TO VOLTAGE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be LEFT AUDIO INPUT SHORT TO
GROUND.
When Monitored and Set Condition:
LEFT AUDIO INPUT SHORT TO GROUND
When Monitored:
With the ignition on
Set Condition:
The Hands Free Module detects low voltage on the input circuit.
LEFT AUDIO INPUT SHORT TO VOLTAGE
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects high voltage on the input circuit.
LEFT AUDIO OUTPUT 1 SHORT TO GROUND
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects a short to Ground on the Audio MUX Left
circuit.
LEFT AUDIO OUTPUT 1 SHORT TO VOLTAGE
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects a short to voltage on the Audio MUX Left
circuit.
POSSIBLE CAUSES
AUDIO MUX LEFT AND AUDIO MUX RIGHT CIRCUITS SHORTED TOGETHER
AUDIO MUX LEFT CIRCUIT OPEN
AUDIO MUX LEFT CIRCUIT SHORT TO GROUND
AUDIO MUX LEFT CIRCUIT SHORT TO VOLTAGE
HANDS FREE MODULE
INTERMITTENT CONDITION
327
TELECOMMUNICATION
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, erase HFM DTCs.
Attempt to make a phone call using the system.
With the DRBIII
t, read HFM DTCs.
Does the DRBIII
t display this DTC?
All
Yes
→ Go To 2
No
→ Go To 6
2
Turn the ignition off.
Disconnect the Radio C2 harness connector.
Disconnect the Hands Free Module harness connectors.
Measure the resistance of the Audio MUX Left circuit.
Is the resistance below 10.0 ohms?
All
Yes
→ Go To 3
No
→ Repair the Audio MUX Left circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Radio C2 harness connector.
Disconnect the Hands Free Module harness connectors.
Measure the resistance between ground and the Audio MUX Left circuit.
Is the resistance above 1000.0 ohms?
All
Yes
→ Go To 4
No
→ Repair the Audio MUX Left circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the Radio C2 harness connector.
Disconnect the Hands Free Module harness connectors.
Turn the ignition on.
Measure the voltage of the Audio MUX Left circuit.
Is the voltage below 1.0 volt?
All
Yes
→ Go To 5
No
→ Repair the Audio MUX Left circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Disconnect the Radio C2 harness connector.
Disconnect the Hands Free Module harness connectors.
Measure the resistance between the Audio MUX Left circuit and the Audio MUX
Right circuit.
Is the resistance above 1000 ohms?
All
Yes
→ Inspect the wiring and connectors for damage or shorted circuits.
Repair as necessary. If ok, replace and program the Hands Free
Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Audio MUX Left circuit for a short to the Audio MUX
Right circuit.
Perform BODY VERIFICATION TEST - VER 1.
328
TELECOMMUNICATION
LEFT AUDIO INPUT SHORT TO GROUND —
Continued
TEST
ACTION
APPLICABILITY
6
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, wiggle the wiring
harnesses. This is to try and duplicate the failure.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
329
TELECOMMUNICATION
LEFT AUDIO INPUT SHORT TO GROUND —
Continued
Symptom List:
MIRROR POWER CIRCUIT SHORT TO GROUND
MIRROR POWER CIRCUIT SHORT TO VOLTAGE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be MIRROR POWER CIRCUIT
SHORT TO GROUND.
POSSIBLE CAUSES
HANDS FREE MODULE
IGNITION RUN/ACC SIGNAL CIRCUIT SHORT TO OTHER CIRCUITS
IGNITION RUN/ACC SIGNAL CIRCUIT SHORT TO VOLTAGE
IGNITION RUN/ACC SIGNAL OPEN
IGNITION RUN/ACC SIGNAL SHORT TO GROUND
REAR VIEW MIRROR
INTERMITTENT CONDITION
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, erase DTCs.
Attempt to make a phone call using the system.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display this DTC?
All
Yes
→ Go To 2
No
→ Go To 7
2
Turn the ignition off.
Disconnect the Rear View Mirror harness connector.
Disconnect the Hands Free Module harness connectors.
Measure the resistance of the Ignition RUN/ACC Signal circuit.
Is the resistance below 10.0 ohms?
All
Yes
→ Go To 3
No
→ Repair the Ignition RUN/ACC Signal circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Rear View Mirror harness connector.
Disconnect the Hands Free Module harness connectors.
Measure the resistance between ground and the Ignition RUN/ACC Signal circuit.
Is the resistance above 1000.0 ohms?
All
Yes
→ Go To 4
No
→ Repair the Ignition RUN/ACC Signal circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
330
TELECOMMUNICATION
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