DTC Troubleshooting: B1008

DTC B1008:  MICU Lost Communication with the Gauge Control Module (A/T Message)

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 B1008 indicated?


YES - Go to 5.


NO - Intermittent failure, the gauge control module (tach) is OK at this time. Check for loose or poor connections at the gauge control module (tach) 36P connector and at the under-dash fuse/relay box connector Q (16P). If the connections are good, check the battery condition and the charging system.n


5.Check for DTCs with the HDS.

Are DTCs B1000, B1008, B1011, and B1032 all indicated?


YES - Go to DTC troubleshooting B1000.n


NO - Go to 6.


6.Select the BODY ELECTRICAL system select menu, then enter the UNIT INFORMATION menu.

7.Check the condition of the gauge control module (tach) from the CONNECTED UNIT.

Is NOT AVAILABLE indicated?


YES - Go to 8.


NO - Faulty MICU, replace the under-dash fuse/relay box.n


8.Turn the ignition switch OFF.

9.Do the gauge control module (tach) input test, and check power supply and ground for the gauge contol module (tach).

Are all inputs OK?


YES - Go to 10.


NO - Repair the faulty input, then recheck the DTCs.n


10.Disconnect the under-dash fuse/relay box connector Q (16P).

11.Disconnect the gauge control module (tach) 36P connector.

12.Check for continuity between the under-dash fuse/relay box connector Q (16P) No. 6 terminal and gauge control module (tach) 36P connector No. 21 terminal.

 

Is there continuity?


YES - Replace the gauge control module (tach).n


NO - Repair an open in the wire between the MICU and the gauge control module (tach).n