Initial Inspection and Diagnostic Overview
How to Troubleshoot the Multiplex Integrated Control System
Troubleshooting CAN Circuit Related Problems
NOTE: Check the PCM for DTCs and troubleshoot PCM Initial Inspection and Diagnostic Overview or F-CAN loss of communication errors first.
Using the HDS (Preferred method)
1. Go to B-CAN System Diagnosis Test Mode A to check for "Connected units" and DTCs. Troubleshooting - B-CAN System Diagnosis Test Mode A
2. If no DTCs are retrieved, go to B-CAN System Diagnosis Test Mode C Troubleshooting - B-CAN System Diagnosis Test Mode C or D. Troubleshooting - B-CAN System Diagnosis Test Mode D
Without HDS (Use only if the HDS is unavailable)
1. Check for communication circuit problems using B-CAN System Diagnostic Test. Troubleshooting - B-CAN System Diagnosis Test Mode A
2. Check for DTCs.
3. Sort, and then troubleshoot the DTCs in this order.
-1 Battery voltage DTCs
-2 Internal error DTCs
-3 Loss of communication DTCs (beginning with the lowest number first; for example, if B1008 and B1011 are retrieved, troubleshoot B1008 first)
-4 Signal error DTCs
4. If no DTCs are retrieved, use B-CAN System Diagnostic Test Mode 2 to check all inputs related to failure. Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)
How to display DTCs on the gauge control module
Enter the B-CAN System Diagnosis Test Mode 1. Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS) While in Test Mode 1, the DTCs which have been detected and stored individually by various B-CAN (Body-controller Area Network) units, will be shown one by one on the LCD display when the communication between the MICU and the gauge control module is normal. To scroll through the DTCs, press the select/reset button.
The unit that has stored the code can be identified by the number shown on the multi-information display.
How to clear the DTC
Set the B-CAN System Diagnosis Test Mode 1. Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS) While in Test Mode 1, press and hold down the SELECT/RESET button for more than 10 seconds.
Loss of Communication DTC cross-reference chart
When an ECU is unable to communicate with the other ECUs on the CAN circuit, the other control units will set loss of communication DTCs. Use this chart to find the control unit that is not communicating.
1. Find the Transmitting Control Unit that is in the same row as all of the loss of communication DTCs retrieved.
2. Do the input test for the transmitting control unit.
BUS OFF and Internal Error Codes
BUS OFF and Internal Error Codes:
Loss of Communication
Loss of Communication:
TX: Transmitting unit does not set a loss communication DTC.