Diagnostic Test

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

1) DETERMINE ACTIVE OR STORED DTC
NOTE: Ensure that the battery is fully charged.

NOTE: The scan tool, SRS Airbag Load Tool MRL 8443, and DVOM are required to perform the following test.

Turn the ignition on.

Select ACTIVE or STORED DTC:

ACTIVE DTC
1. Go to 2).
STORED DTC
1. Go to 4).
2) CHECK FOR SHORTED DRIVER SEAT BELT PRETENSIONER

Fig 1: Checking Driver Seat Belt Pretensioner
Courtesy of CHRYSLER LLC

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Disconnect the Driver Seat Belt Pretensioner connector.

NOTE: Check connectors - Clean and repair as necessary.

Connect the 8443 Load Tool and appropriate Jumper to the Driver Seat Belt Pretensioner connector.

WARNING: To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.

With the scan tool, read the active ORC DTCs.

Does the scan tool display: B1B28 1ST ROW DRIVER SEAT BELT PRETENSIONER CIRCUIT LOW?

Yes
1. Go to 3).
No
1. Replace the Driver Seat Belt Pretensioner in accordance with the Service Information.
2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
3) CHECK (R55) DRIVER SEAT BELT TENSIONER LINE 1 CIRCUIT AND (R53) DRIVER SEAT BELT TENSIONER LINE 2 CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking Driver Seat Belt Tensioner Line 1 Circuit And Driver Seat Belt Tensioner Line 2 Circuit For Short To Ground
Courtesy of CHRYSLER LLC

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Disconnect the 8443 Load Tool and Jumper from the Driver Seat Belt Pretensioner connector.

Disconnect the ORC connectors.

NOTE: Check connectors - Clean and repair as necessary.

Connect the 8443 Load Tool ORC Adapter to the ORC C1 connector.

Measure the resistance of the (R55) Driver Seat Belt Tensioner Line 1 circuit between ground and the ORC adapter.

Measure the resistance of the (R53) Driver Seat Belt Tensioner Line 2 circuit between ground and the ORC adapter.

Is the resistance below 10k ohms on either circuit?

Yes
1. Repair the Driver Seat Belt Tensioner circuits with resistance below 10k ohms for a short to ground.
2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
No
1. Replace the ORC in accordance with Service Information.
2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
4) CHECKING STORED OR INTERMITTENT CODES
NOTE: Diagnose and repair all active codes before diagnosing stored codes. Refer to the DIAGNOSTIC CODE INDEX for a complete list of airbag system diagnostic procedures.

With the scan tool, record and erase all Airbag System Module DTCs.

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Using the wiring diagram/schematic as a guide, inspect the related wiring and connectors for chafed, pierced, pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals. Repair as necessary.

Reconnect all disconnected components and harness connectors.

WARNING: To avoid serious or fatal injury, turn the ignition on, then reconnect the battery.

With the scan tool, monitor for active codes while performing the following:
- Wiggle the wiring harness and connectors of the related airbag circuit.
- Continue the test until either a code becomes active or the problem area is isolated.
In the previous steps you have attempted to recreate the conditions responsible for setting the DTC in question/causing the intermittent condition.

Are any ACTIVE DTCs present?

Yes
1. Select the appropriate diagnostic procedure from the DIAGNOSTIC CODE INDEX .
No
1. No problem found at this time. Erase all codes before returning the vehicle to the customer.