Check Wiring Between Control Module & Driver Impact Sensor

Check the wiring harness between the control module and the driver's side impact sensor







- Turn the ignition switch to the OFF position







Unplug the connector:
- Impact sensor driver's door (328D)
- Check pins 1 and 2 for open circuit/pin slid-out and rectify if necessary.







Unplug the connector:
- Control module, Airbag (331)
- Check pins 41 and 42 for open circuit/pin slid-out and rectify if necessary.
- Connect the break-out box (BOB) to the wiring harness.












Take a resistance reading between
- 42 - Control module, Airbag
- 2 - Impact sensor, driver's door

The reading should be 0 Ohm - 2 Ohm

Checking the wiring harness
Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent breaks and short circuits in the wiring harness. Observe the multimeter, test lamp or diagnostic tool while doing this.

Is the function correct?

NO - Rectifying the Lead

YES - Continue with Check the wiring harness between the control module and the driver's side impact sensor












Measure the resistance. The value should be infinite.
- 42 - Control module, Airbag
- B -

Checking the wiring harness
Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent breaks and short circuits in the wiring harness. Observe the multimeter, test lamp or diagnostic tool while doing this.

Is the reading correct?

NO - Rectifying the Lead

YES - Continue with Check the wiring harness between the control module and the driver's side impact sensor












Take a resistance reading between
- 41 - Control module, Airbag
- 1 - Impact sensor, driver's door

The reading should be 0 Ohm - 2 Ohm

Checking the wiring harness
Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent breaks and short circuits in the wiring harness. Observe the multimeter test lamp or diagnostic tool while doing this.

Is the function correct?

NO - Rectifying the Lead

YES - Continue with Check the wiring harness between the control module and the driver's side impact sensor












Measure the resistance. The value should be infinite.
- 41 - Control module, Airbag
- B -

Checking the wiring harness
Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent breaks and short circuits in the wiring harness. Observe the multimeter, test lamp or diagnostic tool while doing this.

Is the reading correct?

NO - Rectifying the Lead

YES - Changing Components