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MPI – Troubleshooting 13-12 Code No. 23 Camshaft position sensor system Probable cause Range of Check D Ignition switch: ON D Engine speed is approx. 50 r/min or more. Set conditions D Sensor output voltage does not change for 4 seconds (no pulse signal input.) D Malfunction of the camshaft position sensor D Improper connector contact, open or short-circuited D Malfunction of the engine-ECU Measure at the camshaft position sensor connector A-97. D Connect the connector. D Voltage between 2 and earth (Engine: cranking) D Voltage between 2 and earth (Engine: idling) OK Replace the engine-ECU. NG Measure at the camshaft position sensor connector A-97. D Disconnect the connector, and measure at the harness side. 1. Voltage between 3 and earth (Ignition switch: ON) OK: System voltage 2. Voltage between 2 and earth (Ignition switch: ON) OK: 4.8– 5.2 V 3. Continuity between 1 and earth OK: Continuity 1. NG Check the harness wire between the camshaft position sensor 2. NG Check the following con- NG Repair OK Check trouble symptom. NG Check the harness wire NG Repair OK Replace the engine-ECU. 3. NG Check the harness wire between the camshaft position sensor OK Check the following con- NG Repair OK Check trouble symptom. NG Replace the camshaft position sensor. |