Monday, June 10, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 78


* Side air bag



* Roof rail airbag



* SDM



* SDM wiring harness connector



Note: 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.



If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the



high resistance condition due to terminal fretting corrosion.



Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading should stay



consistently between 1.7 and 4.2 ohm without any drop outs or spikes.



* Passenger instrument panel air bag



* Roof rail air bag



* Seat side air bag



* Seat belt pretensioner



* Any inline harness



* SDM



If the reading is erratic while moving the harness, perform the following;



* Inspect each connector terminal for damage or corrosion and repair as necessary.



* Apply Nyogel lubricant 760G to each connector terminal.



* Insure each connector and CPA is correctly seated.



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

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