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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 288 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B0014-B0045CIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Circuit/System Testing

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: 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 module
    • SDM module
    • Air bag wiring harness connector
    • SDM wiring harness connector

    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 special tool J 38715-A  or SA9409Z-A  in place of the inflator restraint module. See Special Tools .
  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 adapter and J 38715-A  or SA9409Z-A  , 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 special tool J 38715-A  or SA9409Z-A  and the adaptor. See Special Tools .
  6. Disconnect the harness connector at the SDM.
  7. Ignition ON, test for less than 1 volt between the appropriate high control circuit terminal and ground.
    • I/P Module - Stage 1 terminal A1
    • I/P Module - Stage 2 terminal B1
    • Left Front Roof Rail Module terminal B
    • Right Front Roof Rail Module terminal B
    • Left Rear Head Curtain terminal 2
    • Right Rear Head Curtain Module terminal 2
    • Seat Belt Pretensioner - Left terminal B
    • Seat Belt Pretensioner - Right terminal B
    • If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the SDM.
  8. Test for less than 1 volt between the appropriate low control circuit terminal and ground.
    • I/P Module - Stage 1 terminal A2
    • I/P Module - Stage 2 terminal B2
    • Left Front Roof Rail Module terminal A
    • Right Front Roof Rail Module terminal A
    • Left Rear Head Curtain Module terminal 1
    • Right Rear Head Curtain Module terminal 1
    • Seat Belt Pretensioner - Left terminal A
    • Seat Belt Pretensioner - Right terminal A
    • If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the SDM.
  9. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal and ground.
    • I/P Module - Stage 1 terminal A1
    • I/P Module - Stage 2 terminal B1
    • Left Front Roof Rail Module terminal B
    • Right Front Roof Rail Module terminal B
    • Left Rear Head Curtain Module terminal 2
    • Right Rear Head Curtain Module terminal 2
    • Seat Belt Pretensioner - Left terminal B
    • Seat Belt Pretensioner - Right terminal B
    • If not within the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the SDM.
  10. Test for infinite resistance between the appropriate low control circuit terminal and ground.
    • I/P Module - Stage 1 terminal A2
    • I/P Module - Stage 2 terminal B2
    • Left Front Roof Rail Module terminal A
    • Right Front Roof Rail Module terminal A
    • Left Rear Head Curtain Module terminal 1
    • Right Rear Head Curtain Module terminal 1
    • Seat Belt Pretensioner - Left terminal A
    • Seat Belt Pretensioner - Right terminal A
    • If not within the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the SDM.
  11. Test for less then 1 ohm between the following high control circuit terminals.
    • I/P Module - Stage 1 terminal A1 and SDM terminal 10
    • I/P Module - Stage 2 terminal B1 and SDM terminal 6
    • Left Front Roof Rail Module terminal B and SDM terminal 13
    • Right Front Roof Rail Module terminal B and SDM terminal 14
    • Left Rear Head Curtain Module terminal 2 and SDM terminal 21
    • Right Rear Head Curtain Module terminal 2 and SDM terminal 22
    • Seat Belt Pretensioner - Left terminal B and SDM terminal 16
    • Seat Belt Pretensioner - Right terminal B and SDM terminal 19
    • If not within the specified range, test the circuit for an open/high resistance.
  12. Test for less then 1 ohm between the following low control circuit terminals.
    • I/P Module - Stage 1 terminal A2 and SDM terminal 112
    • I/P Module - Stage 2 terminal B2 and SDM terminal 7
    • Left Front Roof Rail Module terminal A and SDM terminal 1
    • Right Front Roof Rail Module terminal A and SDM terminal 15
    • Left Rear Head Curtain Module terminal 1 and SDM terminal 20
    • Right Rear Head Curtain Module terminal 1 and SDM terminal 23
    • Seat Belt Pretensioner - Left terminal A and SDM terminal 17
    • Seat Belt Pretensioner - Right terminal A and SDM terminal 18
    • If not within the specified range, test the circuit for an open/high resistance.
  13. If all circuits test normal, replace the SDM.
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