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B0040



DTC B0014-B0045

Diagnostic Instructions

- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach.
- Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

- DTC B0015 01: Driver Pretensioner Deployment Loop Short to Battery.
- DTC B0015 02: Driver Pretensioner Deployment Loop Short to Ground.
- DTC B0015 04: Driver Pretensioner Deployment Loop Open Circuit.
- DTC B0015 0D: Driver Pretensioner Deployment Loop Resistance Above Threshold.
- DTC B0015 0E: Driver Pretensioner Deployment Loop Resistance Below Threshold.
- DTC B0016 01: Left Roof Rail Initiator 1 Deployment Loop Short to Battery.
- DTC B0016 02: Left Roof Rail Initiator 1 Deployment Loop Short to Ground.
- DTC B0016 04: Left Roof Rail Initiator 1 Deployment Loop Open Circuit.
- DTC B0016 0D: Left Roof Rail Initiator 1 Deployment Loop Resistance Above Threshold.
- DTC B0016 0E: Left Roof Rail Initiator 1 Deployment Loop Resistance Below Threshold.
- DTC B0019 01: Passenger Frontal Deployment Loop Stage 1 Short to Battery.
- DTC B0019 02: Passenger Frontal Deployment Loop Stage 1 Short to Ground.
- DTC B0019 04: Passenger Frontal Deployment Loop Stage 1 Open Circuit.
- DTC B0019 0D: Passenger Frontal Deployment Loop Stage 1 Resistance Above Threshold.
- DTC B0019 0E: Passenger Frontal Deployment Loop Stage 1 Resistance Below Threshold.
- DTC B0020 01: Passenger Frontal Deployment Loop Stage 2 Short to Battery.
- DTC B0020 02: Passenger Frontal Deployment Loop Stage 2 Short to Ground.
- DTC B0020 04: Passenger Frontal Deployment Loop Stage 2 Open Circuit.
- DTC B0020 0D: Passenger Frontal Deployment Loop Stage 2 Resistance Above Threshold.
- DTC B0020 0E: Passenger Frontal Deployment Loop Stage 2 Resistance Below Threshold.
- DTC B0022 01: Passenger Pretensioner Deployment Loop Short to Battery.
- DTC B0022 02: Passenger Pretensioner Deployment Loop Short to Ground.
- DTC B0022 04: Passenger Pretensioner Deployment Loop Open Circuit.
- DTC B0022 0D: Passenger Pretensioner Deployment Loop Resistance Above Threshold.
- DTC B0022 0E: Passenger Pretensioner Deployment Loop Resistance Below Threshold.
- DTC B0023 01: Right Roof Rail Initiator 1 Deployment Loop Short to Battery.
- DTC B0023 02: Right Roof Rail Initiator 1 Deployment Loop Short to Ground.
- DTC B0023 04: Right Roof Rail Initiator 1 Deployment Loop Open Circuit.
- DTC B0023 0D: Right Roof Rail Initiator 1 Deployment Loop Resistance Above Threshold.
- DTC B0023 0E: Right Roof Rail Initiator 1 Deployment Loop Resistance Below Threshold.
- DTC B0040 01: Right Third Row Roof Rail Deployment Loop Short to Battery.
- DTC B0040 02: Right Third Row Roof Rail Deployment Loop Short to Ground.
- DTC B0040 04: Right Third Row Roof Rail Deployment Loop Open Circuit.
- DTC B0040 0D: Right Third Row Roof Rail Deployment Loop Resistance Above Threshold.
- DTC B0040 0E: Right Third Row Roof Rail Deployment Loop Resistance Below Threshold.

Diagnostic Fault Information






Circuit/System Description

During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the air bag module. There are 2 shorting bars used within the module connector which will short together both high and low circuits, when the connector is disconnected. This will prevent unwanted deployment of the inflator module during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0015 01, B0016 01, B0019 01, B0020 01, B0022 01, B0023 01, B0040 01
- The air bag module high and/or low circuit is shorted to voltage for 120 milliseconds.
B0015 02, B0016 02, B0019 02, B0020 02, B0022 02, B0023 02, B0040 02
- The air bag module high and/or low circuit is shorted to ground for 120 milliseconds.
B0015 04, B0016 04, B0019 04, B0020 04, B0022 04, B0023 04, B0040 04
- The air bag module high and/or low circuit is open for 120 milliseconds.
B0015 0D, B0016 0D, B0019 0D, B0020 0D, B0022 0D, B0023 0D, B0040 0D
- The air bag module deployment loop resistance is greater than 3.9 ohms for 120 milliseconds.
B0015 0E, B0016 0E, B0019 0E, B0020 0E, B0022 0E, B0023 0E, B0040 0E
- The air bag module deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

Action Taken When the DTC Sets

- The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
- The SDM will store a DTC, however if an event occurs the system will still attempt deployments.

Conditions for Clearing the DTC

- The condition for setting the DTC no longer exists.
- A history DTC will clear once 100 fault-free ignition cycles have occurred.

Diagnostic Aids

- When a harness connector is disconnected, the high control and low control circuits are shorted together by the integral shorting bar. This should be taken into account when testing for faults on these circuits.
- This DTC usually indicates a poor connection or a wiring malfunction between the SDM and the deployment loop.

Circuit/System Testing

Important: When removing the connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
- Pretensioner
- Air bag module
- SDM module
- Air bag wiring harness connector
- SDM wiring harness connector

Important: The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.

1. Verify that the appropriate inflator restraint module connector and CPA are engaged.
->If the above condition is not found, make the appropriate repair.
2. Ignition OFF, disconnect the harness connector at the appropriate inflatable restraint module.
3. With the appropriate load tool adaptor, connect J 38715-A in place of the inflatable restraint module.
4. Ignition ON, with a scan tool, verify the appropriate DTC is set as current.
->If the DTC is not set or is set as history, cycle ignition OFF, disconnect the load tool and adaptor, reconnect the harness connector at the inflator restraint module, and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the inflator restraint module.
5. Ignition OFF, disconnect the load tool and adaptor.
- Disconnect the harness connector at the SDM.
6. Ignition ON, test for less than 1 volt between the appropriate high control circuit terminal listed below and ground:
- I/P module - stage 1 terminal A1 (light duty).
- I/P module - stage 1 terminal A (heavy duty).
- I/P module - stage 2 terminal B1.
- Left front roof rail module terminal B.
- Right front roof rail module terminal B.
- Right rear roof rail module terminal B.
- Seat belt pretensioner - left terminal A X2.
- Seat belt pretensioner - right terminal A X2.
->If greater than the specified range, test the control circuit for a short to voltage.
7. Test for less than 1 volt between the appropriate low control circuit terminal listed below and ground:
- I/P module - stage 1 terminal A2 (light duty).
- I/P module - stage 1 terminal B (heavy duty).
- I/P module - stage 2 terminal B2.
- Left front roof rail module terminal A.
- Right front roof rail module terminal A.
- Right rear roof rail module terminal A.
- Seat belt pretensioner - left terminal B X2.
- Seat belt pretensioner - right terminal B X2.
->If greater than the specified range, test the control circuit for a short to voltage.
8. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal listed below and ground:
- I/P module - stage 1 terminal A1 (light duty).
- I/P module - stage 1 terminal A (heavy duty).
- I/P module - stage 2 terminal B1.
- Left front roof rail module terminal B.
- Right front roof rail module terminal B.
- Right rear roof rail module terminal B.
- Seat belt pretensioner - left terminal A X2.
- Seat belt pretensioner - right terminal A X2.
->If less than the specified value, test the control circuit for a short to ground.
9. Test for infinite resistance between the appropriate low control circuit terminal listed below and ground:
- I/P module - stage 1 terminal A2 (light duty).
- I/P module - stage 1 terminal B (heavy duty).
- I/P module - stage 2 terminal B2.
- Left front roof rail module terminal A.
- Right front roof rail module terminal A.
- Right rear roof rail module terminal A.
- Seat belt pretensioner - left terminal B X2.
- Seat belt pretensioner - right terminal B X2.
->If less than the specified value, test the control circuit for a short to ground.
10. Test for less then 5 ohms between the following high control circuit terminals listed below:
- I/P module - stage 1 harness connector terminal A1 and SDM terminal 10 (light duty).
- I/P module - stage 1 harness connector terminal A and SDM terminal 10 (heavy duty).
- I/P module - stage 2 harness connector terminal B1 and SDM terminal 6.
- Left front roof rail module harness connector terminal B and SDM terminal 13.
- Right front roof rail module harness connector terminal B and SDM terminal 14.
- Right rear roof rail module harness connector terminal B and SDM terminal 22.
- Seat belt pretensioner - left harness connector terminal A and SDM terminal 25.
- Seat belt pretensioner - right harness connector terminal A and SDM terminal 26.
->If greater than the specified range, test the control circuit for an open/high resistance.
11. Test for less then 5 ohms between the following low control circuit terminals listed below:
- I/P module - stage 1 harness connector terminal A2 and SDM terminal 11 (light duty).
- I/P module - stage 1 harness connector terminal B and SDM terminal 11 (heavy duty).
- I/P module - stage 2 harness connector terminal B2 and SDM terminal 17.
- Left front roof rail module harness connector terminal A and SDM terminal 12.
- Right front roof rail module harness connector terminal A and SDM terminal 15.
- Right rear roof rail module harness connector terminal A and SDM terminal 23.
- Seat belt pretensioner - left harness connector terminal B and SDM terminal 24.
- Seat belt pretensioner - right harness connector terminal B and SDM terminal 27.
->If greater than the specified range, test the control circuit for an open/high resistance.
12. If all circuits test normal, replace the SDM.
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