TEST
ACTION
APPLICABILITY
2
Turn the ignition off.
Disconnect the Boost Pressure Sensor harness connector.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage on the Sensor Reference Voltage B circuit.
Is the voltage above 1.0 volt?
All
Yes
→ Repair the Sensor Reference Voltage B circuit for a short to
voltage.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Go To 3
NOTE: Remove the jumper wire and reinstall the ASD Relay.
3
Turn the ignition off.
Disconnect the Accelerator Pedal Position Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ASD Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay connector.
Turn the ignition on.
Measure the voltage on the Accelerator Pedal Position Sensor 1 5-Volt Supply circuit.
Is the voltage below 1.0 volt?
All
Yes
→ Go To 4
No
→ Repair the Accelerator Pedal Position Sensor 1 5-Volt Supply
circuit for a short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
NOTE: Remove the jumper wire and reinstall the ASD Relay.
4
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
148
DRIVEABILITY - DIESEL
P0651-SENSOR REFERENCE VOLTAGE B CKT VOLTAGE TOO HIGH —
Continued