Dodge Caliber. Manual — part 990
3.
(K31) FUEL PUMP CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (K31) Fuel Pump Control circuit between
the TIPM harness connector and the ECM harness connector.
Is the resistance below 10.0 ohms?
Yes
>> Replace and program the TIPM in accordance with the Ser-
vice Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Repair the (K31) Fuel Pump Control circuit for an open cir-
cuit or high resistance.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
PM
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1247
P0629-FUEL PUMP CONTROL CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W
9 - 1248
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
PM
•
When Monitored:
With the ignition on and the Fuel Pump Relay command on.
•
Set Condition:
The ECM detects a short circuit on the (K31) Fuel Pump Relay Control circuit for 0.48 seconds.
Possible Causes
INTERMITTENT DTC
(K31) FUEL PUMP RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
(K31) FUEL PUMP RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
TOTALLY INTEGRATED POWER MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
DTC IS ACTIVE
Ignition on, engine not running.
With the scan tool, Clear DTCs in the Engine Control Module (ECM).
Monitor the scan tool for at least two minutes.
With the scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
>> Go To 2
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
2.
(K31) FUEL PUMP CONTROL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the TIPM C2 harness connector.
Disconnect the ECM harness connectors.
Remove the Main Relay.
Connect a jumper wire between cavity B7 and cavity B9 of the Main
Relay Connector.
Turn the ignition on.
Measure the voltage of the (K31) Fuel Pump Control circuit in the TIPM
harness connector.
Is there any voltage present?
Yes
>> Repair the (K31) Fuel Pump Control circuit for a short to
voltage.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Go to 3
PM
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1249
3.
(K31) FUEL PUMP CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (K31) Fuel Pump Control circuit between
the TIPM harness connector and the ECM harness connector.
Is the resistance below 10.0 ohms?
Yes
>> Replace and program the TIPM in accordance with the Ser-
vice Information.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Repair the (K31) Fuel Pump Control circuit for an open cir-
cuit or high resistance.
Perform the ECM Verification Test Ver. 1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
9 - 1250
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
PM
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