Reading and Clearing Diagnostic Trouble Codes
General Troubleshooting InformationTroubleshooting CAN Circuit Related Problems
NOTE: Check the ECM/PCM for DTCs and troubleshoot ECM/PCM 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 or D. Troubleshooting - B-CAN System Diagnosis Test Mode C
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.
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
NOTE: If the DTC U1280 is stored, troubleshoot DTC U1280 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 the failure.
How to display DTCs on the gauge control module
Set the B-CAN System Diagnosis Test Mode 1. 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 odometer display.
How to clear the DTC
Set the B-CAN System Diagnosis Test Mode 1. 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.
