Troubleshooting - B-CAN System Diagnosis Test Mode D

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Honda Crosstour, 2014 Honda Crosstour, 2013 Honda Crosstour, 2012 Honda Crosstour, and 2011 Honda Accord Crosstour. However, it is still accessible from the selected car via links, so may be relevant.

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 C .
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 HDS INPUTS AND COMMANDS ).

Check the fuse of the malfunctioning output device.
Is the fuse OK?

YES -Go to next step.

NO -Replace the fuse. If the fuse blows again, repair a short to ground on the fuse circuit of the malfunctioning device.
Check for DTCs by selecting the MODE MENU from the HDS.
Are any DTCs indicated?

YES -Go to B-CAN SYSTEM DIAGNOSIS TEST MODE A

NO -Go to next step.
Turn ON the switch that controls the malfunctioning component.
Select the applicable system from the system MODE MENU, then select DATA LIST, and check the output signal for the malfunctioning component.
Is there an output signal?

YES -Go to next step.

NO -Go to step 9.
Check the relay and ground that controls the device that does not work, if applicable. If the relay and ground test OK, then check for an open or a short in the circuit for the malfunctioning component.
Are the relay and circuit OK?

YES -Go to next step.

NO -Replace the relay or repair the wire circuit.
Do the function test for the malfunctioning component.
Does the output device pass the function test?

YES -Go to next step.

NO -Replace the component.
With the malfunctioning output device connected, connect a voltmeter between the malfunctioning output device input and the ground wire that the control unit uses to control the output device circuit.
Select FUNCTIONAL TEST from the MODE MENU, and do the forced operation test of the malfunctioning component.
Is there a change in voltage (12 V to 0 V or 0 V to 12 V)?

YES -Inspect the ground for the component. If OK, replace the component.

NO -Replace the control unit that controls the malfunctioning component.
Select DATA LIST from the MODE MENU, and make sure the switch signal input for the malfunctioning system indicates a change when operated.
Does the switch input indicate ON when the switch is ON?

YES -Replace the control unit that controls the malfunctioning component.

NO -Go to next step.
Check the switch and its ground (if applicable), then check for an open or a short in the wire between the switch and the control unit that monitors it.
Are the switch and the wire harness OK?

YES -Replace the control unit that monitors the switch.

NO -Replace the switch, or repair/replace the wire harness.