NO -
Intermittent failure, the system is OK at this time. Check for loose or poor connections between the rear fuse/relay box and the MICU.?
5. Check for DTCs with the HDS.
Are DTCs B1055, B1157, B1255, B1355, B1806, B1955, and/or B2155, indicated?
YES -
Do the MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests
and General Diagnostics/MICU Input Test.?
NO -
Do the rear MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component
Tests and General Diagnostics/Rear MICU Input Test.?
B1956
DTC Troubleshooting: B1956
DTC B1956:
Rear MICU Lost Communication with Gauge Control Module (A/T Message)
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain
Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting
- B-CAN System Diagnosis Test Mode A.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Is DTC B1956 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time. Check for loose or poor connections between the rear MICU and the gauge control module.?
5. Check for DTCs with the HDS.
Are DTCs B1061, B1359, B1808, B1906, and U0155 also indicated?
YES -
Do the gauge control module input test See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and
General Diagnostics/Gauge Control Module Input Test.?
NO -
Do the rear MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component
Tests and General Diagnostics/Rear MICU Input Test.?
B1957
DTC Troubleshooting: B1957, B1958
DTC B1957:
Rear MICU Lost Communication with Combination Switch Control Unit (HLSW Message)
