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 5).
2) CHECK FOR OPEN SQUIB CIRCUITS IN LEFT SEAT AIRBAG

Fig 1: Checking Left Seat Airbag Squib Circuits
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 Left Seat Airbag connector.

WARNING: To avoid serious or fatal injury, do not place an intact undeployed Seat airbag face down on a hard surface, the airbag will propel into the air if accidentally deployed.

NOTE: Check connectors - Clean and repair as necessary.

Connect the 8443 Load Tool and appropriate Jumper to the Left Seat Airbag 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: B1B1A-LEFT SIDE CURTAIN SQUIB 1 CIRCUIT OPEN?

Yes
1. Go to 3).
No
1. Replace the Left Seat Airbag in accordance with the Service Information.
2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
3) CHECK (R3) LEFT SEAT SQUIB 1 LINE 1 CIRCUIT FOR AN OPEN

Fig 2: Checking Left Seat Squib Circuit For An Open
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 Left Seat Airbag connector.

Disconnect the ORC connectors.

NOTE: Check connectors - Clean and repair as necessary.

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

Measure the resistance of the (R3) Left Seat Squib 1 Line 1 circuit between the Left Seat Airbag connector and the Load Tool ORC Adaptor.

Is the resistance below 1.0 ohm?

Yes
1. Go to 4).
No
1. Repair the (R3) Left Seat Squib 1 Line 1 circuit for an open.
2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
4) CHECK (R1) LEFT SEAT SQUIB 1 LINE 2 CIRCUIT FOR AN OPEN

Fig 3: Checking For An Open In Left Seat Squib 1 Line 2 Circuit
Courtesy of CHRYSLER LLC

Measure the resistance of the (R1) Left Seat Squib 1 Line 2 circuit between the Left Side Seat Airbag connector and the Load Tool ORC Adaptor.

Is the resistance below 1.0 ohm?

Yes

WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment and serious or fatal injury.

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
1. Replace the ORC in accordance with Service Information.
2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
No
1. Repair the (R1) Left Seat Thorax Squib 1 Line 2 circuit for an open.
2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
5) 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.