ZDX V6-3.7L (2010)
Information Bus: 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 See: Testing and Inspection/Initial Inspection and Diagnostic Overview or F-CAN loss of
communication errors first.
Using the HDS (Preferred method)
Connect the HDS to the Data Link Connector (DLC).
NOTE: There are two ways to read B-CAN code with the HDS.
First method; On the HDS, select BODY ELECTRICAL, then select the subsystem that relates to the problem (for example: door locks, keyless,
security, etc.), and then last, select the DTCs..
Second method; Ground the SCS circuit with the HDS, then read the DTCs displayed in the multi-information display (MID) in the gauge assembly, then
go to B-CAN System Diagnosis Test Mode A See: Component Tests and General Diagnostics/Troubleshooting - B-CAN System Diagnosis Test Mode
A.
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 See: Component Tests and General
Diagnostics/Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (Without the HDS).
2. Check for DTCs.
3. If multiple DTCs are stored, sort them, and then troubleshoot the DTCs in this order:
1. Battery voltage DTCs
2. Internal error DTCs
3. Loss of communication DTCs
NOTE: If DTC U1280 is stored, troubleshoot DTC U1280 first See: Testing and Inspection/Diagnostic Trouble Code Tests and Associated
Procedures/U Code Charts/U1280.
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 See: Component Tests and General
Diagnostics/Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (Without the HDS).
How to Display DTCs on the MID of the Gauge Control Module
Enter the B-CAN System Diagnosis Test Mode 1 See: Component Tests and General Diagnostics/Troubleshooting - B-CAN System Diagnosis Test
Mode 1 and Test Mode 2 (Without the HDS). While in Test Mode 1, with normal communication between the MICU and gauge control module, 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. To scroll through the DTCs, press the SEL/RESET button
