Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1148
3.
MTV SOLENOID (Z904) GROUND CIRCUIT OPEN
Measure the resistance between the Ground circuit in the MTV Sole-
noid harness connector and ground.
Is the resistance below 5.0 ohms?
Yes
>> Go To 4
No
>> Repair the open in the MTV Solenoid Ground circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
4.
(K136) MTV CONTROL CIRCUIT SHORT TO BATTERY VOLTAGE
Turn the ignition off
Disconnect the PCM harness connectors.
Turn the ignition on.
Measure the voltage of the (K136) MTV Control circuit in the MTV Sole-
noid harness connector.
Does the voltage indicate voltage present?
Yes
>> Repair the short to voltage in the (K136) MTV Control cir-
cuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 5
5.
(K136) MTV CONTROL CIRCUIT SHORT TO GROUND
Turn the ignition off.
Measure the resistance between the (K136) MTV Control circuit in the
MTV Solenoid harness connector and ground.
Is the resistance below 5.0 ohms?
Yes
>> Repair the short to ground in the (K136) MTV Control cir-
cuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 6
9 - 616
ENGINE ELECTRICAL DIAGNOSTICS
LX
6.
(K136) MTV CONTROL CIRCUIT OPEN
CAUTION: Do not probe the PCM harness connectors. Probing the
PCM harness connectors will damage the PCM terminals resulting
in poor terminal to pin connection. Install Miller Special Tool #8815
to perform diagnosis.
Measure the resistance of the (K136) MTV Control circuit between from
the MTV Solenoid harness connector to the appropriate terminal of the
special tool.
Is the resistance below 5.0 ohms?
Yes
>> Go To 7
No
>> Repair the open in the (K136) MTV Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
Go To 7
7.
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 - 617
P0685-AUTO SHUTDOWN RELAY CONTROL CIRCUIT
For a complete wiring diagram Refer to Section 8W.
9 - 618
ENGINE ELECTRICAL DIAGNOSTICS
LX
•
When Monitored:
With ignition on. Battery voltage above 10 volts.
•
Set Condition:
An open or shorted condition is detected in the ASD relay control circuit. One Trip Fault. Three good trips to
turn off the MIL.
Possible Causes
(A922) FUSED B+ CIRCUITS
(K51) ASD RELAY CONTROL CIRCUIT OPEN
(K51) ASD RELAY CONTROL CIRCUIT SHORTED TO GROUND
ASD RELAY
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ASD RELAY OPERATION
Ignition on, engine not running.
With a scan tool, actuate the ASD Relay.
Is the ASD Relay operating?
Yes
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 2
2.
(A922) FUSED B+ CIRCUITS
Turn the ignition off.
Remove the ASD Relay from the IPM.
Using a 12-volt test light connected to ground, probe the (A922) Fused
B+ circuits in the IPM.
Does the test light illuminate brightly?
Yes
>> Go To 3
No
>> Repair the open or short to ground in the (A922) Fused B+
circuits. Inspect and replace any open fuses.
Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)
3.
ASD RELAY
Measure the resistance of the ASD Relay Coil.
Is the resistance between 60 to 80 ohms?
Yes
>> Go To 4
No
>> Replace the ASD Relay.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
LX
ENGINE ELECTRICAL DIAGNOSTICS
9 - 619
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