DTC Troubleshooting: B1008
DTC B1008:
 MICU Lost Communication with Gauge Control Module (Tach) (A/T Message)
NOTE: Before troubleshooting, check the No. 16 (15 A) fuse in the under-hood fuse/relay box and No. 10 (7.5 A) fuse in the under-dash fuse/relay box.
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch OFF, and then back ON (II).
  1. Wait for 6 seconds or more.
  1. Check for DTCs with the HDS.
Is DTC B1008 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the gauge control module (tach) is OK at this time. Check for loose or poor connections between the gauge control module (tach) and the under-dash fuse/relay box connector Q (16P). If the connections are good, check the battery condition and the charging system.■
  1. Check for DTCs with the HDS.
Are DTCs B1000, B1008, B1011, and B1032 all indicated?
YES -
Go to DTC B1000 troubleshooting.■
NO -
Go to Step 6 .
  1. Select the BODY ELECTRICAL system select menu, then enter the UNIT INFORMATION menu.
  1. Check the condition of the gauge control module (tach) from the CONNECTED UNIT.
Is NOT AVAILABLE indicated?
YES -
Go to Step 8 .
NO -
  1. Turn the ignition switch OFF.
  1. Disconnect the gauge control module (tach) 36P connector.
  1. Turn the ignition switch ON (II).
  1. Measure voltage between the gauge control module (tach) 36P connector No. 17 and No. 18 terminals and body ground.
Is there battery voltage?
YES -
Go to Step 12 .
NO -
Repair an open in the wire.■
  1. Turn the ignition switch OFF.
  1. Check for continuity between the gauge control module (tach) 36P connector No. 15 and No. 16 terminals and body ground.
Is there continuity?
YES -
Go to Step 14 .
NO -
Repair an open in the wire or poor ground (G502, G503).■
  1. Disconnect the under-dash fuse/relay box connector Q (16P).
  1. 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 -
NO -
Repair an open in the wire between the MICU and the gauge control module (tach).■