RSX L4-2.0L (VTEC) (2002)
Information Bus: Testing and Inspection
Multiplex Control System Troubleshooting
Multiplex Control System
Troubleshooting
Special Tool Required:
MPCS Service Connector 07WAZ-001010A
1. Check the No.9 (7.5 A) fuse in the under-hood fusel relay box and the No.10 (7.5 A) fuse in the under- dash fuse/relay box.
Are the fuses OK?
YES - Go to step 2.
NO - Find and repair the cause of the blown fuse.
2. Remove the dashboard lower cover.
3. Switch the ceiling light to the middle position. Close both doors. Turn the ignition switch ON (II). If the driver's seatbelt is unbuckled, the beeper
will beep five times.
4. Check self-diagnosis function Mode 1 for a diagnostic trouble code (DTC) by connecting the special tool (A) to the multiplex control inspection
connector (B). After about 5 seconds, the ignition switch light and ceiling light should come on for 2 seconds, go out, then blink 0.2 second. This
means that you are in Mode 1 of the self-diagnosis function.
5. If there is a DTC, it will blink, pause, then repeat the DTC as long as the ignition switch is ON (II).
Is there a repeating DTC?
YES - Count the blinks, then go to step 8.
NO - See if the SCS circuit is working properly. Go to step 6.
6. Check for continuity between the inspection connector T1 and body ground.
Is there continuity?
YES - Go to step 9.
NO - Go to step 7.
7. Check for continuity between the connector J of under-dash fuse/relay box No.4 terminal and body ground.