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Key Interlock System Circuit Troubleshooting

NOTE: SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ), and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing.
  1. Check the A/T system DTCs with the HDS.

    Are DTCs P0705 and/or P0706 indicated? 

    YES  -Go to DTC troubleshooting P0705 (see DTC P0705: SHORT IN TRANSMISSION RANGE SWITCH CIRCUIT (MULTIPLE SHIFT-POSITION INPUT) ), P0706 (see DTC P0706: OPEN IN TRANSMISSION RANGE SWITCH CIRCUIT ).

    NO  -Go to step  2.

  2. Move the shift lever to P and set the parking brake.
  3. Remove the column covers (see SIDE DEFOGGER VENT TRIM REMOVAL/INSTALLATION ).
  4. Disconnect the steering lock 6P connector.
  5. Turn the ignition switch to ACCESSORY (I).
  6. Check if the ignition switch can be turned to LOCK (0).

    Can the ignition switch be turned to LOCK (0)? 

    YES  -Go to step  7.

    NO  -Replace the ignition key cylinder/steering lock (see CHECK OF LOCK LEVER FORCE ).

  7. Check the No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box.

    Is the fuse OK? 

    YES  -Go to step  8.

    NO  -Replace the fuse. If the fuse blows again, repair a short to ground in the No. 18 (7.5 A) fuse circuit.

  8. Make sure the ignition switch is turned to LOCK (0).
  9. Disconnect driver's under-dash fuse/relay box connector Q (20P).
  10. Check for continuity between steering lock 6P connector terminal No. 3 and body ground.
    Fig 1: Checking Continuity Between Steering Lock 6P Connector Terminal No. 3 And Body Ground
    G06946478Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire between the key interlock solenoid and the driver's MICU.

    NO  -Go to step  11.

  11. Check for continuity between driver's under-dash fuse/relay box connector Q (20P) terminal No. 14 and steering lock 6P connector terminal No. 3.
    Fig 2: Checking Continuity Between Driver's Under Dash Fuse/Relay Box Connector Terminal No. 14 And Steering Lock Connector Terminal No. 3
    G06946479Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  12.

    NO  -Repair an open or high resistance in the wire between the key interlock solenoid and the driver's MICU.

  12. Move the shift lever to P.
  13. Remove the center console (see CENTER CONSOLE REMOVAL/INSTALLATION ).
  14. Disconnect the shift lever 12P connector.
  15. Do the park pin switch test (see KEY INTERLOCK SOLENOID TEST  ).

    Is the switch OK? 

    YES  -Go to step  16.

    NO  -Check the park pin switch installation. If the switch installation is OK, the park pin switch is faulty. Replace the A/T gear position indicator panel light/park pin switch (see PARK PIN SWITCH REPLACEMENT ), and retest.

  16. Check for continuity between A/T gear position indicator panel light/park pin switch 6P connector terminal No. 1 and body ground.
    Fig 3: Checking Continuity Between A/T Gear Position Indicator Panel Light/Park Pin Switch Connector Terminal And Body Ground
    G06946480Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire between A/T gear position indicator panel light/park pin switch 6P connector terminal No. 1 and the driver's MICU.

    NO  -Go to step  17.

  17. Check for continuity between A/T gear position indicator panel light/park pin switch 6P connector terminal No. 2 and body ground.
    Fig 4: Checking Continuity Between A/T Gear Position Indicator Panel Light/Park Pin Switch 6P Connector Terminal No. 2 And Body Ground
    G06946481Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  18.

    NO  -Repair an open or high resistance in the wire between shift lever and body ground (G503).

  18. Check the A/T system Data List with the HDS.

    Is the transmission range switch indicated ON when the shift lever is in P, and is the transmission range switch indicated OFF when the shift lever is shifted to any position other than P? 

    YES  -go to step  20.

    NO  -Go to step  19.

  19. Do the transmission range switch test (see TRANSMISSION RANGE SWITCH TEST ).

    Is the switch OK? 

    YES  -Go to step  20.

    NO  -Check the transmission range switch installation. If the switch installation is OK, replace the transmission range switch (see TRANSMISSION RANGE SWITCH TEST ), and retest.

  20. Disconnect the transmission range switch 10P connector.
  21. Check for continuity between driver's under-dash fuse/relay box connector F (33P) terminal No. 4 and transmission range switch 10P connector terminal No. 7.
    Fig 5: Checking Continuity Between Driver's Under Dash Fuse/Relay Box And Transmission Range Switch Connector Terminals
    G06946482Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  22.

    NO  -Repair an open or high resistance in the wire between the driver's under-dash fuse/relay box and the transmission range switch.

  22. Check for continuity between transmission range switch 10P connector terminal No. 6 and body ground.
    Fig 6: Checking Continuity Between Transmission Range Switch 10P Connector Terminal No. 6 And Body Ground
    G06946483Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Faulty driver's MICU; replace the driver's under-dash fuse/relay box, USA models (see DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) REMOVAL AND INSTALLATION ), Canada models (see CANADA MODELS ).

    NO  -Repair an open or high resistance in the ground wire or poor ground (G101).

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