Troubleshooting - B-CAN System Diagnosis Test Mode C

Multiplex Integrated Control System Troubleshooting - 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 Troubleshooting - 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 controls the output devices Multiplex Integrated Control System Description.
- 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 MODE MENU from the HDS.

Are any DTCs indicated?

YES -

Go to B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.�

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?

YES -

Go 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?

YES -

Go to step 5.

NO -

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

5. Test the relay that controls the device that does not stop or turn off, if applicable. If the relay tests 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?

YES -

Replace the control unit that controls the component that will not turn OFF.�

NO -

Replace the relay or repair 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?

YES -

Replace the control unit that monitors the switch.�

NO -

Replace the switch or repair the wire harness.�