Measure voltage between the injector 2P connector terminal No. 1 and body ground. INJECTOR 2P CONNECTOR Wire side of female terminals Is there battery voltage? YES - Go to step 47. NO - Repair open in the wire between the injector and the PGM-FI main relay. Turn the ignition switch OFF. Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM CONNECTOR B (24P) Wire side of female terminals PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOUR No. 1 P0301 B5 BRN No. 2 P0302 B4 RED No. 3 P0303 B3 BLU No. 4 P0304 B2 YEL Is there continuity? YES - Repair short in the wire between the ECM/PCM and the injector. NO - Go to step 49.

Connect the appropriate injector 2P connector terminal No. 2 to body ground with a jumper wire (see table). INJECTOR 2P CONNECTOR Wire side of female terminals PROBLEM CYLINDER DTC WIRE COLOUR No. 1 P0301 BRN No. 2 P0302 RED No. 3 P0303 BLU No. 4 P0304 YEL Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM CONNECTOR B (24P) Wire side of female terminals PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOUR No. 1 P0301 B5 BRN No. 2 P0302 B4 RED No. 3 P0303 B3 BLU No. 4 P0304 B2 YEL Is there continuity? YES - Replace the injector, then recheck. NO - Repair open in the wire between the ECM/PCM and the injector.