B INSPECTION OF IGNITION SWITCH CIRCUIT. Turn ignition switch to ON or ACC position. Is CIG fuse normal? No → Replace fuse. Is operation normal? No → Short circuit in wire harness between fuse and terminal 4 of computer. Yes ↓ Yes → Fuse faulty. COMPUTER Disconnect computer connector and inspect connector on wire harness side as follows. INSPECT IGNITION SWITCH CIRCUIT Is there battery voltage between terminal 4 and ground with ignition switch turned to ON or ACC. No → Open circuit in wire harness between fuse and terminal 4 of computer. Yes ↓ Replace computer.