Honda Accord: B-CAN System Diagnosis Test Mode
C - Multiplex Integrated Control
System - Body Electrical - Honda Accord MK8 2008-2012 Service ManualHonda Accord: B-CAN System Diagnosis Test Mode C

Do this diagnosis if a component that is controlled by the B-CAN system does not stop or turn off.

NOTE: • If the component does not turn on, go to B-CAN System Diagnosis Test Mode D {see page 22-137).

• See the B-CAN system unit input/output index for a list of input and output devices and the control units that monitor the input and control the output devices (see page 22-128).

1. Check for DTCs by selecting the MODE MENU from the HDS.

Are any DTCs indicated? Y E S

- G o to B-CAN System Diagnosis Test Mode A (see page 22-134).

NO

-Go to step 2.

2. Turn off the switch that controls the malfunctioning component.

3. Select DATA LIST from the MODE MENU, and check the input of the switch that controls the component.

Does the HDS indicate the switch is OFF? Y E S

- G o to step 4.

NO

-Go to step 6.

4. In the DATA LIST, check the output signal of the malfunctioning component.

Is the output signal OFF? Y E S

- G o to step 5.

NO

-Replace the control unit that controls the device that will not turn OFF.

5. Test the relay that does not stop or turn off,. If the relay test OK, then check for a short in the wire between the relay and the component, the relay and control unit, or the component and control unit.

Are the relay and the wire harness OK? Y E S

- R e p l a c e the control unit that controls the component that will not stop or turn OFF.

NO

-Replace the relay or repair/replace the wire harness.

6. Test the switch, then check for a short in the wire between the switch and the control unit that monitors the switch.

Are the switch and wire harness OK? Y E S

- R e p l a c e the control unit that monitors the s witch. NO

-Replace the switch or repair/replace the wire harness

    B-CAN System Diagnosis Test Mode B
    Do this diagnosis if any of the control units are not communicating (Not Available is displayed in the HDS) as found by the B-CAN System Diagnosis Test Mode A (see page 22-134). 1. Using the HDS ...

    B-CAN System Diagnosis Test Mode D
    Do this diagnosis if a component that is controlled by the B-CAN system does not work or come on. NOTE: • If the component does not turn off or stop, go to B-CAN System Diagnosis Test Mode ...

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