Thursday, October 3, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 59


Circuit/System Testing



DTC B0014-B0018 or B0021-B0045



1. Ignition OFF, disconnect the scan tool and disconnect the harness connector at the appropriate air bag or seat belt retractor pretensioner.



2. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the air bag or seat belt retractor pretensioner.



3. Wait for 120 seconds and then test for greater than 25 ohm between the control circuit terminals listed below.



* Left roof rail air bag terminal 1 and 2



* Right roof rail air bag terminal 1 and 2



* Driver seat side air bag terminal 1 and 2



* Passenger seat side air bag terminal 1 and 2



* Driver seat belt retractor pretensioner terminal 1 and 2



* Passenger seat belt retractor pretensioner terminal 1 and 2



锟斤拷 If less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting bars



are lifted. If the circuits and shorting bars tests normal, replace the SDM.



4. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:



* Roof rail air bag control circuit terminal 1



* Roof rail air bag control circuit terminal 2



* Seat side air bag control circuit terminal 1



* Seat side air bag control circuit terminal 2



* Retractor pretensioner control circuit terminal 1



* Retractor pretensioner control circuit terminal 2



锟斤拷 If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the SDM.



5. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:



* Roof rail air bag control circuit terminal 1



* Roof rail air bag control circuit terminal 2



* Seat side air bag control circuit terminal 1



* Seat side air bag control circuit terminal 2



* Retractor pretensioner control circuit terminal 1



* Retractor pretensioner control circuit terminal 2



锟斤拷 If less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the SDM.



6. Install a 3 A fused jumper wire between the control circuit terminals listed below.



* Left roof rail airbag terminal 1 and 2



* Right roof rail airbag terminal 1 and 2



* Driver seat side airbag terminal 1 and 2



* Passenger seat side airbag terminal 1 and 2



* Driver seat belt retractor pretensioner terminal 1 and 2



* Passenger seat belt retractor pretensioner terminal 1 and 2



7. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.



锟斤拷 If greater than the specified range, test both control circuits terminals for an open/high resistance. If the circuits test normal, replace the



SDM.



8. If all circuits test normal, replace the roof rail air bag, seat side air bag, or seat belt pretensioner.



DTC B0019-B0020



1. Ignition OFF, disconnect the scan tool and disconnect harness connector X200.



2. Wait for 120 seconds and then test for greater than 25 ohm between the appropriate control circuit terminals listed below on the SDM side of



the connector:



* Passenger instrument panel airbag stage 1 terminal 5 and 6 X1



* Passenger instrument panel airbag stage 2 terminal 8 and 7 X1



锟斤拷 If less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting bars



are lifted. If the circuits and shorting bars tests normal, replace the SDM.



3. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground on the SDM side of the connector:



* Control circuit terminal 5 X1

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