Multiplex Integrated Control System Troubleshooting - Test Mode C

B-CAN System Diagnosis Test Mode C

NOTE:

Perform this diagnosis if control units connected to be B-CAN System does not stop or does not turn off.
Because several different Tester's can be used to troubleshoot, there might be differences in what is shown on the screen and what is shown in the DTC troubleshooting flow charts in the Service Manual.
If the output device does not turn ON, go to B-CAN system diagnosis test mode D.
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.
Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting procedures in this section.

1.	Check for DTCs by selecting the TEST MODE MENU from the Honda PGM Tester or the Honda Diagnostic System (HDS). Are any DTCs indicated? YES - Go to B-CAN system diagnosis test mode A.n NO - Go to 2.

2.	Turn OFF the switch that controls the malfunctioning output device.

3.	Select the DATA LIST of the TEST MODE MENU, and check the input of the switch signal. Does the Tester indicate the switch is OFF? YES - Go to 4. NO - Go to 6.

4.	In the DATA LIST of the TEST MODE MEMU, check the output signal of the malfunctioning output device. Is the output signal OFF? YES - Go to 5. NO - Replace the control unit that controls the device that will not turn OFF.n

Check the relay if applicable, then check for a short in the wire between the relay and the output device, relay and control unit or output device and control unit.

Are the relay and the wire harness OK?

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

NO - Replace the relay or repair the wire harness.n

6.	Check 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? YES - Replace the control unit that monitors the swtich.n NO - Replace the switch or repair the wire harness.n