Circuit/System Testing
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Refer to SIR Service Precautions .
When removing connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
- Pretensioner
- Air Bag
- SDM
- Pretensioner wiring harness connector
- Air bag wiring harness connector
- SDM wiring harness connector
- Verify that the appropriate air bag or pretensioner connector and CPA are engaged.
- If the above condition is not found, make the appropriate repair.
- Ignition OFF, disconnect the harness connector at the appropriate air bag or pretensioner.
- With the appropriate load tool adaptor, connect J 38715-A in place of the air bag or pretensioner.
- 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 adapter and J 38715-A , reconnect the harness connector at the air bag or pretensioner, and cycle the ignition ON. If the DTC resets after reconnecting, replace the air bag or pretensioner.
- Ignition OFF, disconnect J 38715-A and the appropriate adaptor.
- Disconnect the harness connector at the SDM.
- Ignition ON, test for less than 1 volt between the appropriate high control circuit listed below and ground:
- Passenger instrument panel air bag Stage 1 terminal 1 X1
- Passenger instrument panel air bag Stage 2 terminal 1 X2
- Left roof rail air bag terminal 2
- Right roof rail air bag terminal 2
- Driver seat side air bag terminal 2
- Passenger seat side air bag terminal 2
- Driver seat belt retractor pretensioner terminal 1
- Passenger seat belt retractor pretensioner terminal 1
- If not within the specified range, test the control circuit for a short to voltage.
- Test for less than 1 volt between the appropriate low control circuit terminal listed below and ground:
- Passenger instrument panel air bag Stage 1 terminal 2 X1
- Passenger instrument panel air bag Stage 2 terminal 2 X2
- Left roof rail air bag terminal 1
- Right roof rail air bag terminal 1
- Driver seat side air bag terminal 1
- Passenger seat side air bag terminal 1
- Driver seat belt retractor pretensioner terminal 2
- Passenger seat belt retractor pretensioner terminal 2
- If not within the specified range, test the control circuit for a short to voltage.
- Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal listed below and ground:
- Passenger instrument panel air bag Stage 1 terminal 1 X1
- Passenger instrument panel air bag Stage 2 terminal 1 X2
- Left roof rail air bag terminal 2
- Right roof rail air bag terminal 2
- Driver seat side air bag terminal 2
- Passenger seat side air bag terminal 2
- Driver seat belt retractor pretensioner terminal 1
- Passenger seat belt retractor pretensioner terminal 1
- If not the specified value, test the control circuit for a short to ground.
- Test for infinite resistance between the appropriate low control circuit terminal listed below and ground:
- Passenger instrument panel air bag Stage 1 terminal 2 X1
- Passenger instrument panel air bag Stage 2 terminal 2 X2
- Left roof rail air bag terminal 1
- Right roof rail air bag terminal 1
- Driver seat side air bag terminal 1
- Passenger seat side air bag terminal 1
- Driver seat belt retractor pretensioner terminal 2
- Passenger seat belt retractor pretensioner terminal 2
- If not the specified value, test the control circuit for a short to ground.
- Test for less then 1 ohm between the appropriate high control circuit terminals listed below.
- Passenger instrument panel air bag Stage 1 terminal 1 X1 and SDM terminal 6
- Passenger instrument panel air bag Stage 2 terminal 1 X2 and SDM terminal 10
- Left roof rail air bag terminal 2 and SDM terminal 21
- Right roof rail air bag terminal 2 and SDM terminal 22
- Driver seat side air bag terminal 2 and SDM terminal 13
- Passenger seat side air bag terminal 2 and SDM terminal 14
- Driver seat belt retractor pretensioner terminal 1 and SDM terminal 25 (-V4U) or 17 (V4U)
- Passenger seat belt retractor pretensioner terminal 1 and SDM terminal 26 (-V4U) or 18 (V4U)
- If not within the specified range, test the control circuit for an open/high resistance.
- Test for less then 1 ohm between the appropriate low control circuit terminals listed below:
- Passenger instrument panel air bag Stage 1 terminal 2 X1 and SDM terminal 7
- Passenger instrument panel air bag Stage 2 terminal 2 X2 and SDM terminal 11
- Left roof rail air bag terminal 1 and SDM terminal 20
- Right roof rail air bag terminal 1 and SDM terminal 23
- Driver seat side air bag terminal 1 and SDM terminal 12
- Passenger seat side air bag terminal 1 and SDM terminal 7
- Driver seat belt retractor pretensioner terminal 2 and SDM terminal 24 (-V4U) or 16 (V4U)
- Passenger seat belt retractor pretensioner terminal 2and SDM terminal 27 (-V4U) or 19 (V4U)
- If not within the specified range, test the control circuit for an open/high resistance.
- If all circuits test normal, replace the SDM.
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.