Fuel Shut-off Solenoid: Testing and Inspection
Fuel Shut-off Solenoid Valve 1/Fuel Shut-off Solenoid Valve 2 Circuit Troubleshooting1. Turn the ignition switch OFF.
2. Remove the driver's dashboard under cover.
3. Remove the fuel shut-off solenoid valve relay (A).
4. Turn the ignition switch ON (II).
5. Measure voltage between fuel shut-off solenoid valve relay 5P connector terminal No. 5 and body ground.
Is there battery voltage?
YES - Go to step 6.
NO - Go to step 11.
6. Measure voltage between fuel shut-off solenoid valve relay 5P connector terminal No. 1 and body ground.
Is there battery voltage?
YES - Go to step 14.
NO - Go to step 7.
7. Turn the ignition switch OFF, then check the No. 2 FUEL PUMP (15 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES - Go to step 8.
N0 -
- Repair short in the wire between the No. 2 FUEL PUMP (15 A) fuse and the PCM (C36), between the No. 2 FUEL PUMP (15 A) fuse and the fuel shut-off solenoid valve relay, or between the No. 2 FUEL PUMP (15 A) fuse and the immobilizer control unit. Also replace the No.2 FUEL PUMP (15 A) fuse.
- If the wire is OK, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.
8. Disconnect the under-dash fuse/relay box 12P connector.
9. Connect under-dash fuse/relay box 12P connector terminal No. 12 to body ground with a jumper wire.
10. Check for continuity between body ground and fuel shut-off solenoid valve relay 5P connector terminal No.1.
Is there continuity?
YES - Replace the under-dash fuse/relay box.
NO - Repair open in the wire between the under-dash fuse/relay box and the fuel shut-off solenoid valve relay.
11. Turn the ignition switch OFF.
12. Remove the injector control module relay (A).
13. Check for continuity between injector control module relay 5P connector terminal No. 2 and fuel shut-off solenoid valve relay 5P connector terminal No. 5.
Is there continuity?
YES - Do the injector control module relay circuit troubleshooting.
NO - Repair open in the wire between the injector control module relay and the fuel shut-off solenoid valve relay.
14. Check for continuity between fuel shut-off solenoid valve relay 5P connector terminal No. 3 and body ground.
Is there continuity?
YES - Go to step 15.
NO - Repair open in the wire between the fuel pressure regulator switch and the fuel shut-off solenoid valve relay. If the wire is OK, replace the fuel pressure switch.
15. Reinstall the fuel shut-off solenoid valve relay.
16. Turn the ignition switch ON (II).
17. Measure voltage between fuel shut-off solenoid valve relay 5P connector terminal No. 3 and body ground.
Is there battery voltage?
YES - Go to step 18.
NO - Replace the fuel shut-off solenoid valve relay.
18. Turn the ignition switch OFF.
19. Disconnect the fuel shut-off solenoid valve 22P connector.
20. Turn the ignition switch ON (II), then measure voltage between fuel shut-off solenoid valve 22P connector terminal No. 2 and body ground within 2 seconds.
Is there battery voltage?
YES - Go to step 28.
NO - Go to step 21.
21. Turn the ignition switch OFF.
22. Disconnect the fuel subharness 6P connector.
23. Turning the ignition switch ON (II), then measure voltage between fuel subharness 6P connector terminal No 2 and body ground within 2 seconds
Is there battery voltage?
YES - Go to step 30.
NO - Go to step 24.
24. Turn the ignition switch OFF.
25. Remove the fuel shut-off solenoid valve relay (A).
26. Connect fuel shut-off solenoid valve relay 5P connector terminals No. 1 and No. 2 with a jumper wire.
27. Turn the ignition switch ON (II), then measure voltage between fuel shut-off solenoid valve 22P connector terminal No. 2 and body ground within 2 seconds.
Is there battery voltage?
YES - Check the fuel subharness, and repair it as necessary. Replace the fuel shut-off solenoid valve relay.
NO - Repair open in the wire between the fuel shut-off solenoid valve relay, the fuel shut-off solenoid valve 2, and the fuel subharness 6P connector.
28. Turn the ignition switch OFF.
29. Check for continuity between fuel shut-off solenoid valve 22P connector terminal No. 1 and body ground.
Is there continuity?
YES - Replace the fuel pressure regulator P1 solenoid valve.
NO - Repair open in the wire between fuel shut-off solenoid valve 2 and G401.
30. Turn the ignition switch OFF.
31. Check for continuity between fuel subharness 6P connector terminal No. 1 and body ground.
Is there continuity?
YES - Check the fuel subharness, and replace it if necessary. If the fuel subharness is OK, replace the fuel tank.
NO - Repair open in the wire between the fuel subharness 6P connector and G601.