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Diagnostic Procedure 1. CHECK GROUND CONNECTIONS • Turn ignition switch off. • Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con- trols). • Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine Room Harness (With 1.6L/1.8L Engine) in Section 16 Wiring). Are the ground connections OK? Yes >> Go to the next step. No >> Repair or replace ground connections. 2. CHECK ACCELERATOR PEDAL POSITION SENSOR 1 (APPS1) ELECTRICAL CONNECTOR • Disconnect the APPS1 electrical connector (1). • Inspect the electrical connector for damage. Is the electrical connector OK? Yes >> Go to the next step. No >> Repair or replace the electrical connector as necessary. 3. CHECK ACCELERATOR PEDAL POSITION SENSOR 1 (APPS1) POWER SUPPLY CIRCUIT • Turn ignition switch on. • Check supply voltage between sensor terminal 6 and ground in the APP sensor electrical connector • Approximately 5 V should exist. Is the check result normal? Yes >> Go to step 5. No >> Go to the next step. 4. DETECT MALFUNCTIONING PART • Check harness connectors E-102, C-102. • Check harness for an open and short between APP sensor 1 and ECM. Is the check result normal? Yes >> Go to the next step. No >> Repair or replace malfunctioning part. DIAGNOSIS & TESTING VISMD030008 LTSMD030053 03
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