Check the No. 16 (15 A) fuse in the under-hood fuse/relay box and the No. 10 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is blown, find and correct the cause, then replace the fuse.
Turn the ceiling light switch in ‘‘DOOR'' (middle) position. Close all doors. Turn the ignition switch to ON (II).
NOTE: If the driver's seat belt is unbuckled, the beeper will beep.
Connect the MPCS short connector (A) to the MICU service check connector (B), and turn the switch (C) on.
After 5 seconds, the ceiling light should come on for 2 seconds, go out, then blink once for 0.2 second. This means that you are in Test Mode 1 of the self-diagnostic function.
About 1 second after step 5, the ceiling light will blink and indicate the DTC, and repeat it every 3 seconds. Troubleshoot the DTC as indicated below:
DTC
Cause and Troubleshooting
1
The MICU cannot receive signals sent from the MICU itself (for checking the sending signals), or the MICU cannot receive signals from the gauge control module (tach). If DTC 1 only indicates, substitute a known-good gauge control module (tach) and an MICU one at a time, in that order, and recheck for the DTC after each substitution.