Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Key Interlock System Circuit Troubleshooting
SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ), and the precautions and procedures (see PRECAUTIONS AND PROCEDURES ), in SRS (SUPPLEMENTAL RESTRAINT SYSTEM) - PILOT before performing repairs or service.
- Turn the ignition switch to ACC (I). The shift lever must be in the P position.
- Disconnect the steering lock assembly connector.
- Check if the ignition key can be moved to LOCK (0) position, and remove the key from the cylinder.
Is the ignition key able to move to the LOCK (0) position, and then removed?
YES - Go to step 4.
NO - Replace the ignition key cylinder/steering lock assembly (see STEERING LOCK REPLACEMENT ).
- Turn the ignition switch to ACC (I) or ON (II), and shift to the N position.
- Check for the voltage between the No. 4 terminal of the key switch connector and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
YES - Go to step 6.
NO - Check for a blown No. 8 (7.5 A) fuse in the driver's under-dash fuse/relay box. If the fuse is OK, repair open or short in the wire between the No. 4 terminal of the key switch connector and driver's under-dash fuse/relay box.
- Disconnect the park pin switch connector on the shift lever.
- With the shift lever in the P position and pulled back toward the driver, check for continuity between the No. 1 and No. 3 terminals of the park pin switch connector.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Go to step 8.
NO - Repair open in the wires between the park pin switch and the connector. If the wires are OK, replace the shift lever assembly.
- Check for the voltage between the No. 3 terminal of the park pin switch connector and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there battery voltage?
YES - Go to step 9.
NO - Check for a blown No. 47 (20 A) fuse in the under-hood fuse/relay box. If the fuse is OK, repair open or short in the wire between the No. 3 terminal of the park pin switch connector and under-hood fuse/relay box.
- Check for continuity between the No. 1 terminal of the park pin switch connector and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES - Check for a loose park pin switch connector.
NO - Repair open in the wire between the No. 1 terminal of the park pin switch connector and ground (G401), or repair poor ground (G401).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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