2000-2004 models

Turn the ignition switch OFF, then disconnect the PGM-FI main relay connectors.
Check for continuity between body ground and PGM-FI main relay diode 2P connector terminal No. 2.

Fig 1: Checking For Continuity Between Body Ground And PGM-FI Main Relay Diode 2P Connector Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES -Go to step 3.
2. NO -Repair open in the wire between the PGM-FI main relay and G101.
Measure voltage between body ground and PGM-FI main relay (IGP) 4P connector terminal No. 2.

Fig 2: Measuring Voltage Between Body Ground And PGM-FI Main Relay (IGP) 4P Connector Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?
1. YES -Go to step 5 .
2. NO -Go to step 4.
Check for a blown No. 7 (15 A) fuse in the under-hood fuse/relay box.
Is the fuse blown?
1. YES -Repair short in the wire between the PGM-FI main relay and the No. 7 (15 A) fuse.
2. NO -Repair open in the wire between the PGM-FI main relay and the No. 7 (15 A) fuse.
Turn the ignition switch ON (II). Measure voltage between body ground and PGM-FI main relay (FUEL PUMP) 4P connector terminal No. 2, and between PGM-FI main relay (IGP) 4P connector terminal No. 4.

Fig 3: Measuring Voltage Between Body Ground And PGM-FI Main Relay (Fuel Pump) 4P Connector Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?
1. YES -Go to step 7 .
2. NO -Go to step 6.
Check for a blown No. 2 (15 A) fuse in the under-dash fuse/relay box.
Is the fuse blown?
1. YES -Repair short in the wire between the PGM-FI main relay and the No. 2 (15 A)fuse.
2. NO -Repair open in the wire between the PGM-FI main relay and the No. 2 (15 A) fuse.
Turn the ignition switch OFF, and disconnect ECM connector A (32P).
Check for continuity between PGM-FI main relay (FUEL PUMP) 4P connector terminal No. 3 and ECM connector terminal A15.

Fig 4: Checking For Continuity Between PGM-FI Main Relay (Fuel Pump) 4P Connector Terminal No. 3 And ECM Connector Terminal A15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES -Go to step 9.
2. NO -Repair open in the wire between the PGM-FI main relay (FUEL PUMP) and the ECM (A15).
Reconnect ECM connector A (32P) and the PGM-FI main relay connectors.
Turn the ignition switch ON (II), then measure voltage between ECM connector terminals B1 and B20, and between B9 and B20.

Fig 5: Measuring Voltage Between ECM Connector Terminals B1 And B20
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?
1. YES -Go to step 11.
2. NO -Check for an open in the wires between the PGM-FI main relay and the ECM (B1, B9). If the wires are OK, replace the PGM-FI main relay.
Turn the ignition switch OFF, then ON (II) again, and measure voltage between ECM connector terminals A15 and B2 within the first 2 seconds.

Fig 6: Measuring Voltage Between ECM Connector Terminals A15 And B2 Within First 2 Seconds
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 1.0 V or less?
1. YES -The PGM-FI main relay may be faulty (see PGM-FI MAIN RELAY TEST ).
2. NO -Update the ECM if it does not have the latest software, or substitute a known-good ECM; 2000-2001 M/T models (see HOW TO TROUBLESHOOT CIRCUITS AT THE ECM ), 2002-2004 M/T models and CVT model (see ECM UPDATING AND SUBSTITUTION FOR TESTING-2002-2006 M/T MODELS AND CVT MODEL ), then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM (see ECM REPLACEMENT ).