Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.

Has a problem been found?

	▶ Repair as necessary and go to "Verification of vehicle Repair" procedure.
	▶ Go to "APS1 Circuit Inspection" procedure.

Ignition "OFF"

Refer to "Shop Manual" and disconnect Accelerator Pedal Position Sensor connector.

Ignition switch "ON"

Measure the voltage between Pin No. 3 (APS1 Supply) terminal of Acceleration Pedal Position Sensor harness connector and chassis ground.

Is the measured value within specification?

	▶ Go to "Ground Circuit Inspection" procedure.
	▶ Repair open or short in power circuit, and then go to "Verification of vehicle Repair" procedure.

Ignition switch "OFF"

Disconnect battery (-) cable.

Refer to "Shop Manual" and disconnect Accelerator Pedal Position Sensor connector.

Measure the resistance between Pin No. 5 (Ground) terminal of Accelerator Pedal Position Sensor harness connector and chassis ground.

Re-connect battery (-) cable.

Ignition switch "ON".

Measure the voltage between Pin No. 3 (APS1 Supply) terminal of Accelerator Pedal Position Sensor harness connector and chassis ground.(A)

Measure the voltage between Pin No. 3 (APS1 Supply) terminal and Pin No. 5 (Ground) terminal of Accelerator Pedal Position Sensor harness connector.(B)

Is the measured value within specification?

	▶ Go to "Signal Circuit Inspection" procedure.
	▶ Repair open or short in ground circuit, and then go to "Verification of vehicle Repair" procedure.

Ignition switch "OFF"

Disconnect battery (-) cable.

Refer to "Shop Manual" and disconnect Accelerator Pedal Position Sensor and ECM/PCM connector.

Measure the resistance between Pin No. 4 (Signal) terminal of Accelerator Pedal Position Sensor harness connector and Pin No. 7 (Signal) terminal of ECM/PCM harness connector.

Measure the resistance between Pin No. 4 (Signal) terminal of Accelerator Pedal Position Sensor harness connector and chassis ground.

Measure the resistance between Pin No. 4 (Signal) terminal of Accelerator Pedal Position Sensor harness connector and battery (+) terminal.

Is the measured value within specification?

	▶ Go to "APS2 Circuit Inspection" procedure.
	▶ Repair open or short in ground circuit, and then go to "Verification of vehicle Repair" procedure.

Ignition switch "OFF"

Refer to "Shop Manual" and disconnect Acceleration Pedal Position Sensor connector.

Ignition switch "ON"

Measure the voltage between Pin No. 2 (APS2 Supply) terminal of Acceleration Pedal Position Sensor harness connector and chassis ground.

Is measured value within specification?

	▶ Go to "Ground Circuit Inspection" procedure.
	▶ Repair open or short in power circuit, and then go to "Verification of vehicle Repair" procedure.

Ignition switch "OFF"

Disconnect battery (-) cable.

Refer to "Shop Manual" and disconnect Accelerator Pedal Position Sensor connector.

Measure the resistance between Pin No. 6 (Ground) terminal of Accelerator Pedal Position Sensor harness connector and chassis ground.

Re-connect battery (-) cable.

Ignition switch "ON".

Measure the voltage between Pin No. 2 (APS2 Supply) terminal of Accelerator Pedal Position Sensor harness connector and chassis ground.(A)

Measure the voltage between Pin No. 2 (APS2 Supply) terminal and Pin No. 6 (Ground) terminal of Accelerator Pedal Position Sensor harness connector.(B)

Is measured value within specification?

	▶ Go to "Signal Circuit Inspection" procedure.
	▶ Repair open or short in ground circuit, and then go to "Verification of vehicle Repair" procedure.

Ignition switch "OFF"

Disconnect battery (-) cable.

Refer to "Shop Manual" and disconnect Accelerator Pedal Position Sensor and ECM/PCM connector.

Measure the resistance between Pin No. 1 (Signal) terminal of Accelerator Pedal Position Sensor harness connector and Pin No. 18 (Signal) terminal of ECM/PCM harness connector.

Measure the resistance between Pin No. 1 (Signal) terminal of Accelerator Pedal Position Sensor harness connector and chassis ground.

Measure the resistance between Pin No. 1 (Signal) terminal of Accelerator Pedal Position Sensor harness connector and battery (+) terminal.

Is the measured value within specification?

	▶ Go to "Component Inspection" procedure.
	▶ Repair open or short in ground circuit, and then go to "Verification of vehicle Repair" procedure.