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Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won’t Shut OFF
Do this diagnosis if a component that is controlled by the B-CAN system does not stop or turn off.
NOTE:
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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. |
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1. |
Check for DTCs by selecting the system MODE MENU from the HDS.
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If any DTCs are not indicated, go to step 2. | |
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2. |
Turn off the switch that controls the malfunctioning component. |
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3. |
Select the applicable system from the system MODE MENU, then select DATA LIST, and check the input of the switch that controls the related component.
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If HDS indicates the switch is OFF, go to step 4. |
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If HDS indicates the switch is not OFF, go to step 6. | |
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4. |
In the DATA LIST, check the output signal of the malfunctioning component.
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If the output signal is OFF, go to step 5. |
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If the output signal is not OFF, replace the control unit that controls the device that will not turn OFF.? | |
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5. |
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.
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If the relay and the wire harness are OK, replace the control unit that controls the component that will not stop or turn OFF.? |
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If the relay and the wire harness are not OK, replace the relay or repair/replace the wire harness.? | |
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6. |
Check the switch, then check for a short in the wire between the switch and the control unit that monitors the switch.
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If the switch and the wire harness are OK, replace the control unit that monitors the switch.? |
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If the switch and the wire harness are not OK, replace the switch or repair/replace the appropriate wire harness.? | | | 