DTC P0653: Sensor Reference Voltage B Circuit High Voltage Turn the ignition switch ON (II). Clear the DTC with the HDS. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0653 indicated?
YES | - | Go to Step 4 .
NO | - | Intermittent failure, system is OK at this time.Check for poor connections or loose terminals at the CMP sensor, the IMRC position sensor, the APP sensor and the ECM.■
Turn the ignition switch OFF, and wait 30 seconds. Disconnect ECM connectors No. 1 (96P) and No. 2 (58P). Turn the ignition switch ON (II). Measure voltage between body ground and ECM connector No. 1 terminals No. 3, No. 29 and ECM connector No. 2 terminal No. 13 individually. Is there battery voltage?
YES | - | Repair short to power in the wire between the ECM connector terminals and these sensors, then go to Step 16 . CMP sensor and ECM connector No. 1 terminal No. 29 IMRC position sensor and ECM connector No. 1 terminal No. 3 APP sensor and ECM connector No. 2 terminal No. 13
NO | - | Go to Step 8 .
Turn the ignition switch OFF. Disconnect the connectors from these sensors: CMP sensor IMRC position sensor APP sensor |