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 controls the output devices (see HDS INPUTS, OUTPUTS, AND COMMANDS )
- Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting procedures in this service information.
- Check for DTCs by selecting the TEST 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 DATA LIST from the TEST 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
- 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, 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 turn OFF
NO -Replace the relay or repair 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 the wire harness