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P2120-ACC PEDAL POSITION SENSOR 1 CKT PLAUSIBILITY —
TEST
8
Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Sensor Ground circuit between the APP Sensor and the
ECM.
Is the resistance below 10.0 ohms?
Yes → Go To 9
→ Repair the APP Sensor Ground circuit for an open.
No
9
Turn the ignition off.
Disconnect the APP Sensor harness connector.
Using a 12-volt test light connected to 12-volts, check the Sensor ground circuit of the
appropriate potentiometer.
Does the test light illuminate brightly?
Yes → Replace the Accelerator Pedal Position Sensor.
→ Replace and program the Engine Control Module in accordance
No
10
Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the APP Sensor Signal circuit.
Is the resistance below 10.0 ohms?
Yes → Go To 11
→ Repair the APP Sensor Signal circuit for an open
No
11
Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the APP Sensor Signal circuit.
Is the resistance below 1000 ohms?
Yes → Repair the APP Sensor Signal circuit for a short to ground.
→ Go To 12
No
12
Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between the APP Sensor Signal circuit and the Sensor
Ground circuit at of the APP Sensor harness connector.
Is the resistance below 1000 ohms?
Yes → Repair the APP Sensor Signal and Sensor Ground circuits for a
→ Go To 13
No
ACTION
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
short together.
Perform ROAD TEST VERIFICATION - VER-2.
DRIVEABILITY - DIESEL
209
Continued
APPLICABILITY
All
All
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All
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