Parasitic Draw

Parasitic Draw Check 1 (Check Each BB-CAN Unit) 

Test Procedure 

• Preparation
• • -Short the BB-CAN_H line to BB-CAN_L line with a jumper wire while the test leads are connected.

• Procedure
• • Turn the vehicle to the ON mode and then the OFF (LOCK) mode.
  • Get out of the vehicle and close all the doors.
  • Wait for at least 40 seconds.
  • Measure the parasitic draw.

Results 

When the parasitic draw is 30.0 mA or less, disconnect the control units from the BB-CAN circuit one at a time, then measure the parasitic draw. Do the input test for the control unit that reduced the parasitic draw to 30.0 mA or less when disconnected.

Parasitic Draw Check 2 (Circuit, Control Unit, Component) 

Test Procedure 

• Preparation
• • Remove the fuse from the fuse box one at a time, and each time, measure the parasitic draw.

Results 

Short circuit failure should be present in the circuit, control unit, or component that is connected to the fuse that was removed right before when the measured parasitic draw dropped.