Turn the ignition switch ON (II). Measure voltage between the APP sensor 6P connector terminals No. 1 and No. 2. (For example; Right handle) Wire side of female terminals Is there about 5 V? YES – Go to step 11. NO – Go to step 10. Measure voltage between the ECM connector terminals A 76 and 78. Is there about 5 V? YES – Repair open in the wire between ECM and the APP sensor. NO – Substitute a known-good ECM and recheck. If symptom/indication goes away, replace the original ECM.

Check the APP sensor signal circuit for short. Is a problem found? YES – Repair open in the signal wire between ECM and the APP sensor 1. NO – Replace the APP sensor 1. NOTICE The battery power supply short circuit to 5 V power supply damages the ECM. aaa