Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1147
P0653-SENSOR REFERENCE VOLTAGE 2 CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition on.
•
Set Condition:
When the PCM recognizes the Auxiliary 5-volt Supply circuit voltage is too high. One Trip Fault. ETC light is
flashing.
Possible Causes
(F856) AUXILIARY 5-VOLT SUPPLY SHORTED TO BATTERY VOLTAGE
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ACTIVE DTC
Ignition on, engine not running.
With a scan tool, read DTCs.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
(F856) AUXILIARY 5-VOLT SUPPLY SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect all the Sensors that share the (F856) Auxiliary 5-volt Supply
circuit.
NOTE: Improperly installed aftermarket accessories can cause this
DTC to set. Check for wiring added by customer.
Ignition on, engine not running.
Measure the voltage on the (F856) Auxiliary 5-volt Supply circuit at the
CMP Sensor harness connector.
Is the voltage present?
Yes
>> Repair the short to battery voltage in the (F856) Auxiliary
5-volt Supply circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to
9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 3
9 - 612
ENGINE ELECTRICAL DIAGNOSTICS
LX
3.
PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and
Ground circuits.
Were there any problems found?
Yes
>> Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
LX
ENGINE ELECTRICAL DIAGNOSTICS
9 - 613
P0660–MANIFOLD TUNE VALVE SOLENOID CIRCUIT
For a complete wiring diagram Refer to Section 8W.
9 - 614
ENGINE ELECTRICAL DIAGNOSTICS
LX
•
When Monitored:
With the ignition on. ASD Relay energized. Battery voltage greater than 10 volts.
•
Set Condition:
The PCM senses the MTV in not at the desired state. One Trip Fault.
Possible Causes
MTV (Z904) GROUND CIRCUIT OPEN
(K136) MTV CONTROL CIRCUIT SHORT TO BATTERY VOLTAGE
(K136) MTV CONTROL CIRCUIT SHORT TO GROUND
(K136) MTV CONTROL CIRCUIT OPEN
MANIFOLD TUNED VALVE SOLENOID
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ACTIVE DTC
Ignition on, engine not running.
With a scan tool, read DTC.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
MANIFOLD TUNE VALVE SOLENOID OPERATION
Turn the ignition off.
Disconnect the MTV Solenoid harness connector.
Ignition on, engine not running.
Using a 12–volt test light, connect one end to the (K136) MTV Control circuit and the other end the (Z904) Ground
circuit in the MTV Solenoid harness connector.
With the scan tool, actuate (Toggle) the MTV Solenoid.
Does the test light illuminate brightly and flash on and off?
Yes
>> Replace the Manifold Tune Valve Solenoid.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 3
LX
ENGINE ELECTRICAL DIAGNOSTICS
9 - 615
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