P0089-FUEL PRESSURE 1 CONTROL PERFORMANCE

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on and the Fuel Pressure Solenoid command on.
Set Condition:
The Engine Control Module (ECM) detects that the (K370) Fuel Pressure Solenoid Control circuit voltage is implausible for 0.28 seconds.

Possible Causes

(K369) FUEL PRESSURE SOLENOID SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

(K370) FUEL PRESSURE SOLENOID CONTROL CIRCUIT SHORTED TO VOLTAGE

(K370) FUEL PRESSURE SOLENOID CONTROL CIRCUIT SHORTED TO GROUND

(K370) FUEL PRESSURE SOLENOID CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

FUEL PRESSURE SOLENOID

ENGINE CONTROL MODULE (ECM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

1.DTC IS ACTIVE

Is the status Active for this DTC?

Yes

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.(K369) FUEL PRESSURE SOLENOID SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

Is the test light illuminated and bright?

Yes

Repair the (K369) Fuel Pressure Solenoid Supply circuit for an open circuit or high resistance.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

3.(K370) FUEL PRESSURE SOLENOID CONTROL CIRCUIT SHORTED TO VOLTAGE

Is there any voltage present?

Yes

Repair the (K370) Fuel Pressure Solenoid Control circuit for a short to voltage.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

4.(K370) FUEL PRESSURE SOLENOID CONTROL CIRCUIT SHORTED TO GROUND

Is the resistance below 1000 ohms?

Yes

Repair the (K370) Fuel Pressure Solenoid Control circuit for a short to ground.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

5.(K370) FUEL PRESSURE SOLENOID CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 10.0 ohms?

Yes

Repair the (K370) Fuel Pressure Solenoid Control circuit for an open circuit or high resistance.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

6.FUEL PRESSURE SOLENOID

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

NOTE: The circuit will remain actuated by the controller for 30 seconds. Be certain the actuation is active when checking the circuit.

NOTE: The test light should not be illuminated.

NOTE: The circuit will remain actuated by the controller for 30 seconds. Be certain the actuation is active when checking the circuit.

Is the test light illuminated and bright with the actuation at 100% and not illuminated with the actuation at 0%?

Yes

Replace the Fuel Pressure Solenoid in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

7.ENGINE CONTROL MODULE (ECM)

Were any problems found?

Yes

Repair as necessary.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Replace the Engine Control Module (ECM) in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).