Civic L4-1.3L Hybrid (2008)
Information Bus: Initial Inspection and Diagnostic Overview
General Troubleshooting Information
Using the HDS (Preferred method)
1. Go to B-CAN System Diagnosis Test Mode A See: Component Tests and General Diagnostics/Troubleshooting - B-CAN System Diagnosis Test
Mode A to check for "Connected units" and DTCs.
2. If no DTCs are retrieved, go to B-CAN System Diagnosis Test Mode C or D. See: Component Tests and General Diagnostics/Troubleshooting -
B-CAN System Diagnosis Test Mode C
Without HDS (Use only if the HDS is unavailable)
1. Check for communication circuit problems using B-CAN System Diagnostic Test.
2. Check for DTCs.
3. Sort, and then troubleshoot the DTCs in the order below.
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.
How to display DTCs on the gauge control module (tach)
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 odometer/trip meter display when the communication between the MICU and the gauge control module (tach) 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
While in Test Mode 1, press and hold down the SELECT/RESET button for more than 10 seconds.
Troubleshooting CAN Circuit Related Problems
NOTE: Check the PCM for DTCs and troubleshoot PCM or F-CAN loss of communication errors first.
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 unit will set loss of communication DTCs. Use this
chart to find the control unit that is not communicating.
