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 all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.

Has a problem been found?

	▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Power Circuit Inspection" procedure.

Ignition "OFF".

Refer to "Shop Manual" and disconnect ATM Solenoid connector.

Ignition "ON".

Measure voltage between Pin No. 14 (Power) terminal of ATM Solenoid harness connector and chassis ground.

Is measured value within specification?

	▶ Go to "Signal Circuit Inspection" procedure.
	▶ Repair open or short in power circuit between ATM Solenoid and PCM and then go to "Verification of vehicle Repair" procedure.

Ignition "OFF".

Refer to "Shop Manual" and remove necessary parts to get access to ATM Solenoid connector and lift vehicle with suitable lift.

Engine "ON".

Back probe and measure signal waveform between Pin No. 8 (Signal) terminal of ATM Solenoid harness connector and chassis ground.

Fig.1) Input Speed & Output Speed data and signal waveform at Engine "ON", Gear Lever Position at "P/N".

Fig.2) Input Speed & Output Speed data and signal waveform at Engine "ON", Gear Lever Position at "R" and no brake pedal applied.

Fig.3) Input Speed & Output Speed data and signal waveform at Engine "ON", Gear Lever Position at "D" and Vehicle speed at Approx. 30 km/h(Approx. 18.6 mph).

Fig.4) Picture of VMI probe to measure Input/Output Speed sensor signal waveform.

Is measured value within specification?

▶ Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage. ▶ Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

▶ Repair open or short in signal circuit between ATM Solenoid and PCM and then go to "Verification of vehicle Repair" procedure. ▶ If problem still occurs, go to "Component Inspection" procedure.