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

Using the B-CAN System Diagnosis Test Mode 1 (Use only if the HDS is unavailable)

1. Check for communication circuit problems using B-CAN System Diagnostic Test Mode 1 and Mode 2. Troubleshooting - B-CAN System Diagnosis Test Mode 1 And Test Mode 2 (Without The HDS)

2. Check for DTCs. Troubleshooting - B-CAN System Diagnosis Test Mode 1 And Test Mode 2 (Without The HDS)

3. Sort, and then troubleshoot the DTCs in the order.
-1 Battery voltage DTCs
-2 Internal error DTCs
-3 Loss of communication DTCs

-3 NOTE: If B1006 and B1059 are retrieved, troubleshoot B1006 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 A 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 Multi-information display when the communication between the MICU and the gauge control module is normal. To scroll through the DTCs, press the select/reset switch on the gauge control module.






The unit that has stored the code can be identified by the number shown on the multi-information display.





How to clear the DTC

Enter the B-CAN System Diagnosis Test Mode 1. Troubleshooting - B-CAN System Diagnosis Test Mode A While in Test Mode 1, press and hold down the SELECT/RESET switch button for more than 10 seconds to clear the DTCs.

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