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 do this diagnosis if the symptom is related to the B-CAN system.

NOTE: Always cycle 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
- Door-open and tailgate-open indicators
- Horns (security and panic)
- Chimes (key-in, seat belt, lights-on, and parking brake)
- Power window/moonroof key-off timer
- Wiper/washer
- Security
- Keyless entry
- Power door locks
- Key interlock
- Dash lights brightness control
- Tailgate release actuator

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 system select menu, select UNIT INFORMATION, and then select CONNECTED UNIT to see if the following control units are communicating with the HDS.

- MICU
- Gauge control module
- Immobilizer-keyless control unit
- Climate control unit
- Automatic lighting control unit
- HandsFreeLink control unit

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.
- The HDS only checks the connected units status one time when BODY ELECTRICAL is selected. To check the status after repair, reboot the HDS and repeat step 3.

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 DTC B1000 troubleshooting B1000.�

4. Select the system that has the problem from the BODY ELECTRICAL system select 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 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 does not run or turn on, go to Test Mode D Troubleshooting - B-CAN System Diagnosis Test Mode D.

- Exterior lights
- Turn signals
- Entry light control
- Interior lights
- Horn (security and panic)
- Wiper/washer

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

- Gauge control module
- Door-open and tailgate-open indicator
- Chimes (key-in, seat belt, lights-on, and parking brake)
- Security
- Keyless entry
- Key interlock
- Dash lights brightness control
- Audio system
- Navigation (if equipped)

5. Record all DTCs, and troubleshoot them 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, begin by troubleshooting B1008).
- Signal error DTCs.