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Injector Control Module Relay Circuit Troubleshooting

  1. Turn the ignition switch to LOCK (0).
  2. Remove the driver's dashboard undercover, refer to DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION .
  3. Remove the injector control module relay (A).
    Fig 1: Identifying Injector Control Module Relay
    G06769206Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Connect injector control module relay 5P connector terminal No. 3 to body ground with a jumper wire.
    Fig 2: Connecting Injector Control Module Relay 5P Connector Terminal No. 3 To Body Ground With Jumper Wire
    G06769207Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Jump the SCS line with the HDS.
  6. Disconnect PCM connector A (44P).
  7. Check for continuity between body ground and PCM connector terminal A15.
    Fig 3: Checking Continuity Between Body Ground And PCM Connector Terminal A15
    G06769208Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 8.

    NO  -Repair open in the wire between the injector control module relay and the PCM (A15).

  8. Measure the voltage between injector control module relay 5P connector terminal No. 1 and body ground.
    Fig 4: Measuring Voltage Between Injector Control Module Relay 5P Connector Terminal No. 1 And Body Ground
    G06769209Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 9.

    NO  -

    • Repair open in the wire between the injector control module relay and the No. 5 +B INJ (15 A) fuse in the under-dash fuse/relay box. Also replace the No. 5 +B INJ (15A) fuse.
    • Repair open in the wire between the No. 5 +B INJ (15 A) fuse in the under-dash fuse/relay box and the No. 2 OP MAIN (80 A) fuse in the under-hood fuse/relay box. Also replace the No. 2 OP MAIN (80 A) fuse.
    • If needed, replace the under-hood fuse/relay box, refer to the UNDER-HOOD FUSE/RELAY BOX (ALL EXCEPT HYBRID) , or the under-dash fuse/relay box, refer to the UNDER-DASH FUSE/RELAY BOX (ALL EXCEPT HYBRID) .
  9. Turn the ignition switch to ON (II).
  10. Measure the voltage between injector control module relay 5P connector terminal No. 5 and body ground.
    Fig 5: Measuring Voltage Between Injector Control Module Relay 5P Connector Terminal No. 5 And Body Ground
    G06769210Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 11.

    NO  -Repair open in the wire between the injector control module relay and PGM-FI main relay 1.

  11. Turn the ignition switch to LOCK (0).
  12. Reconnect the injector control module relay and PCM connector A (44P).
  13. Open the SCS line with the HDS.
  14. Turn the ignition switch to ON (II).
  15. Measure the voltage between injector control module relay 5P connector terminal No. 2 and body ground.
    Fig 6: Measuring Voltage Between Injector Control Module Relay 5P Connector Terminal No. 2 And Body Ground
    G06769211Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Repair open in the wire between the injector control module relay, the injector control module, the injector, or the fuel shut-off solenoid valve relay.

    NO  -Go to step 16.

  16. Test the injector control module relay (see POWER RELAY TEST ).

    Is the injector control module relay OK? 

    YES  -Reconnect all connectors, then update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM, refer to ECM/PCM REPLACEMENT .

    NO  -Replace the injector control module relay.

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