Civic L4-1.8L CNG (2008)
17. Check the PSP SWITCH in the DATA LIST with the HDS.
Does it change to ON?
YES - Replace the PSP switch.
NO - Go to step 18.
18. Turn the ignition switch OFF.
19. Remove the jumper wire from the PSP switch 2P connector.
20. Jump the SCS line with the HDS.
21. Disconnect ECM/PCM connector A (44P).
22. Connect PSP switch 2P connector terminal No. 1 to body ground with a jumper wire.
23. Check for continuity between body ground and ECM/PCM connector terminal A22.
Is there continuity?
YES - Go to step 24.
NO - Repair open in the wire between the PSP switch and the ECM/PCM (A22).
24. Check for continuity between PSP switch 2P connector terminal No. 2 and body ground.