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.
- If the component does not turn on, go to B-CAN System Diagnosis Test Mode D (see 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 control the output devices (see HDS INPUTS AND FUNCTION TESTS ).
- 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 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
NO -Go to step 2.
- Turn off the switch that controls the malfunctioning component.
- Select the applicable system from the system MODE MENU, then select DATA LIST, 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.
- 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.
- Check the relay that does not stop or turn off, if applicable, 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 stop or turn OFF.
NO -Replace the relay, or repair/replace the wire harness.
- 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 switch.
NO -Replace the switch, or repair/replace the wire harness.