DTC B1808: Power Seat Control Unit 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 TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Clear the DTCs with the HDS.
Turn the ignition switch OFF, and then back ON (II).
Check for DTCs with the HDS.
Is DTC B1808 indicated?
1. YES - Go to step 4.
2. NO - Check for poor connections. If OK, check battery condition and charging system.
Check for DTCs with the HDS.
Are DTCs B1008 and B1061 indicated?
1. YES - Go to step 7.
2. NO - Go to step 5.
Turn the ignition switch OFF.
Do the POWER SEAT CONTROL UNIT INPUT TEST .
Is the input test OK?
1. YES - Faulty power seat control unit.
2. NO - Refer to the POWER SEAT CONTROL UNIT INPUT TEST and correct the cause.
Turn the ignition switch OFF.
Do the gauge control module input test (see GAUGE CONTROL MODULE INPUT TEST ).
Is the input test OK?
1. YES - Faulty gauge control module.
2. NO - Refer to the gauge control module input test and correct the cause.