Honda CR-V: Multiplex Integrated Control System

Honda CR-V (2006–2011) Service Manual / Body Electrical / Multiplex Integrated Control System

Component Location Index

Honda CR-V. Multiplex Integrated Control System

General Troubleshooting Information

Troubleshooting CAN Circuit Related Problems

NOTE: Check the PCM for DTCs, and troubleshoot 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.

2. If no DTCs are retrieved, go to B-CAN System Diagnosis Test Mode C or D.

Without HDS (Use only if the HDS is unavailable)

1. Check for communication circuit problems using B-CAN System Diagnostic Test Mode 1 and Mode 2.

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

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 display when the communication between the MICU and the gauge control module is normal. To scroll through the DTCs, press the select/reset button.

Honda CR-V. Multiplex Integrated Control System

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

Honda CR-V. Multiplex Integrated Control System

How to clear the DTC

While in Test Mode 1, press and hold down the SELECT/RESET button for about 13 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

Honda CR-V. Multiplex Integrated Control System

DTC Troubleshooting Index

NOTE: Check the PCM for DTCs, and troubleshoot PCM or F-CAN loss of communication errors first, then record all DTCs. Sort them. by DTC type using the DTC troubleshooting index, then troubleshoot the DTC(s) in this order.

MICU

Honda CR-V. Multiplex Integrated Control System

Gauge Contro1 Module

Honda CR-V. Multiplex Integrated Control System

Immobilizer-Keyless Control unit

Honda CR-V. Multiplex Integrated Control System

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