Chrysler 300M 2002 Service Manual page 2691

DRIVEABILITY - NGC
P0685-ASD RELAY CONTROL CIRCUIT —
TEST
3 Turn the ignition off.
Remove the ASD Relay from the PDC.
Ignition on, engine not running.
Measure the voltage of the Fused B+ circuits in the PDC.
Is the voltage above 11.0 volts?
Yes → Go To 4
→ Repair the Fused B+ circuit. Check and replace any open fuses.
No
4 Turn the ignition off.
Remove the ASD Relay from the PDC.
Measure the resistance of the ASD Relay between the Fused B+ terminal and the
ASD Relay Control terminal.
Is the resistance between 60 to 80 ohms?
Yes → Go To 5
→ Replace the ASD Relay.
No
5 Turn the ignition off.
Remove the ASD Relay from the PDC.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the ASD Control circuit from the PDC to the appropriate
terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes → Go To 6
→ Repair the open in the ASD Relay Control circuit.
No
6 Turn the ignition off.
Remove the ASD Relay from the PDC.
Measure the resistance between ground and the ASD Relay Control circuit in the
PDC.
Is the resistance below 5.0 ohms?
Yes → Repair the short to ground in the ASD Relay Control circuit.
→ Go To 7
No
7 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.
Repair
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
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APPLICABILITY
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