Honda ACCORD HYBRID 2005 Service Manual page 1763

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Troubleshooting the CAN circuit related problems

Using the HDS (Preferred method)

1. Go to B-CAN System Diagnosis Test Mode A to check for "Connected units" and DTCs (see page 22-84).

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

Without the HDS

(Should be used only if HDS is unavailable)

3. Check for communication circuit problems using B-CAN System Diagnosis Test Mode 1 (see page 22-84).

4. Check for DTCs while in Mode 1 (see page 22-89).

5. Sort, and then troubleshoot the DTCs in the order below. Refer to the DTC troubleshooting for DTC descriptions.

Internal error and voltage failure DTCs

Loss of communication DTCs

Signal error DTCs

6. If no DTCs are retrieved, use B-CAN System Diagnosis Test Mode 2 to check all inputs related to failure (see page 22-84).

Loss of Communication DTC cross-reference chart

When an ECU is unable to communicate with the other ECUs on the circuit, the other units will set loss of communication DTCs. Use this chart

to find the control unit that is not communicating.

7. Find the Transmitting Unit that is in the same row as all of the loss of communication DTCs retrieved.

8. Perform the input test for the transmitting unit.

Transmitting

Receiving Unit/Loss of Communication DTC

Transmitting

Control unit

Control Unit

Relay Control

Relay Control

Control unit

Control unit

Switch Control

Switch Control

Wiper Switch

RX: Receiving unit does not set a loss of communication DTC.

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