Check the RP sensor signal circuit for short. Wire side of female terminals RP sensor 3P connector JUMPER WIRE Is a problem found? YES – Repair the RP sensor ground circuit. NO – Go to step 13. Measure the resistance of RP sensor. Is there 0.9 – 1.3 ohms? YES – Substitute a known-good ECM and recheck. If symptom/indication goes away, replace the original ECM. NO – Replace the RP sensor. NOTICE The battery power supply short circuit to 5 V power supply damages the ECM.

DTC P1224: Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage Check the DTC. Are there other DTCs P1625, P1626 (beside DTC P1224 being output? YES – Go to DTC P1625, P1626 chart (5 V reference #1 circuit failure). NO – Go to step 2. Check for the following conditions: Damaging APP sensor An incorrect APP sensor fixing Damaging accelerator pedal and wire Is a problem found? YES – Repair as necessary. NO – Go to step 3. Turn the ignition switch ON (II). Check the TP (APP) with the scan tool. Is about 0 % indicated? YES – Go to step 5. NO – Go to step 6. Press the accelerator pedal. Is about 0 (idle) – 100 % (WOT) indicated? YES – Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the APP sensor and at the ECM. NO – Go to step 6. Turn the ignition switch OFF. Disconnect the APP sensor 6P connector. aaa