Disconnect following components or connectors, one at a time, and check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and body ground. PGM-FI main relay 2 (FUEL PUMP) A/F sensor relay Throttle actuator control module relay ECM/PCM connector A (31P) Each injector 2P connector Camshaft position (CMP) sensor B 3P connector Crankshaft position (CKP) sensor 3P connector Does continuity go away when one of the above components is disconnected?
YES | - | Replace the component that made the short to body ground go away when disconnected. If the item is the ECM/PCM, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM. Also replace the No. 8 FI ECU (ECM/PCM) (15 A) fuse.■
NO | - | Go to Step 29 .
Disconnect the connectors of all these components. PGM-FI main relay 2 (FUEL PUMP) A/F sensor relay Throttle actuator control module relay ECM/PCM connector A (31P) Injectors Camshaft position (CMP) sensor B Crankshaft position (CKP) sensor |