Chrysler RG Voyager. Manual — part 592
Symptom:
P0688-ASD RELAY SENSE CIRCUIT LOW
When Monitored and Set Condition:
P0688-ASD RELAY SENSE CIRCUIT LOW
When Monitored:
With ignition key on. Battery voltage greater than 10 volts.
Set Condition:
No voltage sensed at the PCM when the ASD relay is energized. One Trip
Fault.
POSSIBLE CAUSES
INTERMITTENT CONDITION
ASD RELAY
FUSED B+ CIRCUIT
ASD RELAY OUTPUT CIRCUIT OPEN (NO START)
IPM FUSE & RELAY CENTER
ASD RELAY OUTPUT CIRCUIT OPEN
PCM START
PCM
TEST
ACTION
APPLICABILITY
1
NOTE: Inspect the ASD Relay fuse located in the IPM. If the ASD Relay fuse
is open, repair the cause of the open first before continuing. Inspect the ASD
Relay Output circuit for a short to ground for the cause of the open fuse.
NOTE: Diagnose P685 - Auto Shutdown Relay Control Circuit first if set
along with this DTC.
With the DRBIII
t, erase the DTC.
Attempt to start the engine. If the engine will not start, crank the engine for at least
15 seconds. It may be necessary to repeat several times.
Does the DTC reset.
All
Yes
→ Go To 2
No
→ Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
2
Attempt to start the engine.
Does the engine start.
All
Yes
→ Go To 3
No
→ Go To 5
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DRIVEABILITY - NGC
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the IPM C4 harness connector
Measure the resistance of the ASD Output circuit between the IPM harness
connector and the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 4
No
→ Repair the ASD Relay Output circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
4
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
5
Turn the ignition off.
Install a substitute relay in place of the ASD Relay.
With the DRBIII
t, erase DTCs.
Attempt to start the engine.
With the DRBIII
t, read DTCs.
Does the DTC reset?
All
Yes
→ Go To 6
No
→ Replace the ASD Relay.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
6
Turn the ignition off.
Remove the ASD Relay from the IPM.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the IPM.
Does the test light illuminate?
All
Yes
→ Go To 7
No
→ Replace the IPM Fuse & Relay Center.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
7
Turn the ignition off.
Remove the ASD Relay from the IPM.
Disconnect the PCM harness connector.
Disconnect the IPM C4 harness connector.
Measure the resistance of the ASD Relay Output circuit between the IPM harness
connector and the PCM harness connector.
Is the resistance below 5.0 ohms.
All
Yes
→ Go To 8
No
→ Repair the ASD Relay Output circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
251
DRIVEABILITY - NGC
P0688-ASD RELAY SENSE CIRCUIT LOW —
Continued
TEST
ACTION
APPLICABILITY
8
NOTE: Ensure the IPM C4 harness connector is connected to the IPM.
Turn the ignition off.
Disconnect the PCM harness connector.
Measure the resistance of the ASD Relay Output circuit between the IPM and the
PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Replace the IPM Fuse & Relay Center.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
252
DRIVEABILITY - NGC
P0688-ASD RELAY SENSE CIRCUIT LOW —
Continued
Symptom:
P0700-TRANSMISSION CONTROL SYSTEM/READ TRANSMISSION
DTCS ON THE DRBIII
t
TEST
ACTION
APPLICABILITY
1
This is an informational DTC letting you know that a DTC(s) is stored in the
Transmission Control Module.
Erase this DTC from the PCM after all Transmission DTC(s) have been repaired.
Using the DRBIII
t, read the Transmission Controller DTC and refer to the
Transmission Category and perform the appropriate symptom.
PCM Diagnostic Information complete.
All
Continue
Test Complete.
253
DRIVEABILITY - NGC
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