Parasitic Draw Check: Inspection

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

■ Test Procedure 

• Preparation
  • Short the B-CAN_H line to B-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 27.0 mA or less, disconnect the control units from the B-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 27.0 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.