Troubleshooting - B-CAN System Diagnosis Test Mode B

Multiplex Integrated Control System Troubleshooting - B-CAN System Diagnosis Test Mode B

Perform this diagnosis if any of the control units are not communicating (Not Available is displayed on the HDS) as found by B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Using the HDS, select the system that has the symptom from the BODY ELECTRICAL menu.

2. Select DTCs, and then check for loss of communication DTCs.

Are any loss of communication DTCs indicated?

YES -

Go to step 3.

NO -

Faulty MICU; replace the under-dash fuse/relay box Under-Dash Fuse/Relay Box Removal and Installation.

3. Do the power, ground, and communication part of the input test for the units not communicating with the HDS.