Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating
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 - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
1. Using the HDS, select the system that has the symptom from the BODY ELECTRICAL SYSTEM SELECT menu.
2. Select DTCs, and then check for loss of communication DTCs.
- If any loss of communication DTCs are indicated, go to step 3.
- If any loss of communication DTCs are not indicated, faulty MICU; replace the under-dash fuse/relay box .
3. Do the power, ground, and communication part of the input test for the unit(s) not communicating with the HDS.
| Unit not communicating |
|---|
| MICU |
| Gauge control module |
| Climate control unit |
| Automatic lighting control unit/sensor *1 |
| Automatic lighting/rain sensor *2 |
| Keyless access control unit |
| Power seat control unit *3 |
| Door multiplex control unit |
| Auto high-beam control unit *4 |
| Parking and back-up sensor control unit *5 |
| Wireless charger *6 |
*1: Without automatic wiper
*2: With automatic wiper
*3: With DPMS
*4: With auto high-beam system
*5: With parking and back-up sensor
*6: With wireless charger