Troubleshooting - B-CAN System Diagnosis Test Mode B

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

Do this diagnosis if any of the control units are not communicating (Not Available is displayed in the HDS) as found by the 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 driver's under-dash fuse/relay box Drivers Under-Dash Fuse/Relay Box (MICU) Removal/Installation.�

3. Do the power, ground, and communication part of the input test for the unit(s) not communicating with the HDS.