Circuit/System Testing

NOTE: Refer to SIR SERVICE PRECAUTIONS .
When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

The pretensioner
The air bag module
The SDM module
The air bag wiring harness connector
The SDM wiring harness connector

Verify that the steering wheel inflator restraint module connector and CPA are engaged.
- If the above condition is found, make the appropriate repair.
Ignition OFF, disconnect the harness connector at the steering wheel inflator module.
With the appropriate load tool adaptor, connect J 38715-A or SA9409Z-A in place of the steering wheel inflator module.
Ignition ON, with a scan tool, verify DTC is set as current.
- If the DTC is not set or is set as history, cycle ignition OFF, disconnect the load tool and adapter, reconnect the harness connector at the steering wheel inflator module, and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the steering wheel inflator module.
Ignition OFF, disconnect the load tool and the adaptor.
Disconnect the steering wheel module coil in-line connector X275.
With the appropriate load tool adaptor, connect special tool J 38715-A in place of the steering wheel module.
Ignition ON, with a scan tool, verify DTC is set as current.
- If DTC is not set or is set as history, replace the steering wheel module coil.
Ignition OFF, disconnect load tool and the 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.
- Stage 1 steering wheel module coil connector terminal 2 X275
- Stage 2 steering wheel module coil connector terminal 4 X275
  - If not the specified range, test the circuit for a short to voltage.
Test for less than 1 volt between the appropriate low control circuit listed below and ground.
- Stage 1 steering wheel module coil connector terminal 1 X275
- Stage 2 steering wheel module coil connector terminal 3 X275
  - If not the specified range, test the circuit for a short to voltage.
Ignition OFF, test for infinite resistance between the appropriate high control circuit listed below and ground.
- Stage 1 steering wheel module coil connector terminal 2 X275
- Stage 2 steering wheel module coil connector terminal 4 X275
  - If not the specified range, test the circuit for a short to ground.
Test for infinite resistance between the appropriate low control circuit listed below and ground.
- Stage 1 steering wheel module coil connector terminal 1 X275
- Stage 2 steering wheel module coil connector terminal 3 X275
  - If not the specified range, test the circuit for a short to ground.
Test for less then 1 ohm between the following high control circuit terminals listed below.
- Stage 1 steering wheel module coil connector terminal 2 X275 and SDM terminal 9
- Stage 2 steering wheel module coil connector terminal 4 X275 and SDM terminal 5
  - If not the specified range, test the circuit for an open/high resistance.
Test for less then 1 ohm between the following low control circuit terminals listed below.
- Stage 1 steering wheel module coil connector terminal 1 X275 and SDM terminal 8
- Stage 2 steering wheel module coil connector terminal 3 X275 and SDM terminal 4
  - If not the specified range, test the circuit for an open/high resistance.
If all circuits test normal, replace the SDM.