DTC Troubleshooting: B1168
DTC B1168:
 Gauge Control Module Lost Communication with the ECM (ENG Message)
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0) and then back to ON (II).
  1. Wait for at least 6 seconds.
  1. Check for DTCs with the HDS.
Is DTC B1168 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure. The system is OK at this time. Check for loose or poor connections.■
  1. Check for DTCs with the HDS.
Are all of DTCs B1168, B1170, B1178, B1183 and B1187 also indicated at the same time?
YES -
Troubleshoot DTC B1178. ■
NO -
Go to Step 6 .
  1. Check for PGM-FI system DTCs with the HDS.
Is any DTCs indicated?
YES -
Go to the indicated troubleshooting.■
NO -
Go to Step 7 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the gauge control module (tach) 36P connector.
  1. Disconnect the ECM connector A (44P) *1 (49P) *2 .
    • R18A2 engine
    • L13Z1 engine
    *1:
    R18A2 engine and K20Z4 engine
    *2:
    L13Z1 engine

  1. Connect the gauge control module (tach) 36P connector terminals No. 1 and No. 19 and body ground with jumper wires.