B1188

DTC B1188: Gauge Control Module Lost Communication with the MICU (RM Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B- CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF, and then back ON (II).
3. Wait for 6 seconds or more.
4. Check for DTCs with the HDS.

Is DTC B1188 indicated?

YES - Go to step 5.

NO - Intermittent failure. The gauge control module is OK at this time. Check for loose or poor connections. If the connections are good, check the battery condition, and the charging system.

5. Check for DTCs with the HDS.

Are DTCs B1188 and B1905 indicated at the same time?

YES - Faulty MICU; replace the under-dash fuse/relay box.

NO - Replace the gauge control module.

B1000 - B1284:

B1150 - B1188:

B1200 - B1241:

B1750 - B2240:

Multiplex Integrated Control System

NOTE: Check the PCM for DTCs and troubleshoot PCM or F-CAN loss of communication errors first,then record all DTCs, and sort them by DTC type using the DTC troubleshooting index, then troubleshoot the DTC(s) in this order.

- Battery voltage DTCs
- Internal error DTCs
- Loss of communication DTCs (beginning with the towest number first; for example, if B1008 and B1O11 are retrieved, troubleshoot B1008 first).
- Signal error DTCs