Troubleshooting - B-CAN System Diagnosis Test Mode A

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

Check the PCM for DTCs and troubleshoot PCM Initial Inspection and Diagnostic Overview or F-CAN loss of communication errors first, then perform this diagnosis if the symptom is related to the B-CAN system.

NOTE: Always turn the ignition switch within 3 seconds when prompted in the DTC troubleshooting procedures in this section.

1. Compare the symptom with this list of B-CAN related systems:

- Gauge control module
- Exterior lights
- Turn signals
- Entry light control
- Interior lights
- Safety indicators
- Rear window defogger
- HandsFreeLink
- Horns (security and panic)
- Chimes (key-in, seat belt, lights-on and parking brake)
- Power windows
- Power window/moonroof timer
- Wiper/washer
- Security
- Keyless entry
- Power door locks
- Climate control or HVAC control
- Key interlock
- Dash lights brightness
- Driving position memory
- Power tailgate
- Audio unit
- Immobilizer
- Parking and back-up sensor system

Is the symptom related to the B-CAN system?

YES -

Go to step 2.

NO -

Go to the system troubleshooting for the system with the symptom.�

2. Connect the HDS to the data link connector (A), then turn the ignition switch to ON (II).






3. From the BODY ELECTRICAL menu, select UNIT INFORMATION, and then select CONNECTED UNITS listed to see if the following control units are communicating with the HDS.

- MICU
- Gauge control module
- Automatic lighting control unit
- Power seat control unit (HDS name: Memory seat control unit)
- HandsFreeLink control unit
- Door multiplex control unit (HDS name: Power window unit)
- Rear MICU
- Power tailgate control unit
- Climate control unit or HVAC control unit
- Immobilizer-keyless control unit
- Parking and back-up sensor system

NOTE:

- If a unit is communicating with the HDS, DETECT will be displayed.
- If a unit is not communicating or the vehicle is not equipped, "Not Available" will be displayed.

Are all control units communicating with the HDS?

YES -

Go to step 4.

NO -

If any of the control units are not communicating, go to B-CAN System Diagnosis Test Mode B Troubleshooting - B-CAN System Diagnosis Test Mode B. If all units are not communicating or only the MICU is communicating, go to the DTC U1280 troubleshooting U1280.�

4. Select the system that has the problem from BODY ELECTRICAL menu, then select DTCs.

Are any DTCs indicated?

YES -

Go to step 5.

NO -

If the problem is related to one of the following items and the system that is malfunctioning does not stop or turn off, go to B-CAN System Diagnosis Test Mode C Troubleshooting - B-CAN System Diagnosis Test Mode C. If the problem is related to one of the following items and the system that is malfunctioning does not run or turn on, go to B-CAN System Diagnosis Test Mode D Troubleshooting - B-CAN System Diagnosis Test Mode D.

- Exterior lights
- Turn signals
- Entry light control
- Interior lights
- Horns (security and panic)
- Power windows
- Wiper/washer
- Power door locks

If the problem is related to one of the following items, go to the troubleshooting for that individual system.�

- Gauge control module
- Safety indicators
- Chimes (key-in, seat belt and lights-on)
- Rear window defogger (climate or HVAC control)
- Security
- Keyless entry
- Climate control or HVAC control
- Key interlock
- Dash lights brightness
- Audio system
- Navigation
- Driving position memory
- HandsFreeLink
- Power tailgate
- Immobilizer

5. Record all DTCs, and sort them by DTC type.

6. Troubleshoot the DTC(s) in this order:

- Battery voltage DTCs.
- Internal error DTCs.
- Loss of communication DTCs. Begin troubleshooting with the lowest number first (Example: if DTC B1008 and B1011 are retrieved, troubleshoot DTC B1008 first). Refer to loss of communication DTC cross reference chart.
- Signal error DTCs.