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2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 348
* Left rear low level audio signal (-) - terminal 2
* Right rear low level audio signal (+) - terminal 3
* Right rear low level audio signal (-) - terminal 4
锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the
rear seat audio (RSA) module.
锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.
7. Disconnect the X3 harness connector at the amplifier.
8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 13
* Left rear low level audio signal (-) - terminal 5
* Right rear low level audio signal (+) - terminal 12
* Right rear low level audio signal (-) - terminal 4
锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the
rear seat audio (RSA) module.
锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
9. If all circuits test normal, replace the amplifier.
DTC Set By Radio UQA with Y91 and U42 or UQS and U42
1. Ignition OFF, disconnect the X3 and X4 harness connectors at the amplifier.
2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left front low level audio signal (+) - terminal 11 X3
* Left front low level audio signal (-) - terminal 12 X3
* Right front low level audio signal (+) - terminal 3 X3
* Right front low level audio signal (-) - terminal 4 X3
* Left rear low level audio signal (+) - terminal 11 X4
* Left rear low level audio signal (-) - terminal 12 X4
* Right rear low level audio signal (+) - terminal 3 X4
* Right rear low level audio signal (-) - terminal 4 X4
* Subwoofer low level audio signal (+) - terminal 5 X4
* Subwoofer low level audio signal (-) - terminal 6 X4
* Center Channel low level audio signal (+) - terminal 13 X4
* Center Channel low level audio signal (-) - terminal 14 X4
锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the
radio.
锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. If all circuits test normal, replace the amplifier.
DTC Set By Radio UQA with Y91 and U42 or UQS and U42
1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.
2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left front low level audio signal (+) - terminal 11 X3
* Left front low level audio signal (-) - terminal 12 X3
* Right front low level audio signal (+) - terminal 3 X3
* Right front low level audio signal (-) - terminal 4 X3
* Subwoofer low level audio signal (+) - terminal 5 X4
* Subwoofer low level audio signal (-) - terminal 6 X4
* Center Channel low level audio signal (+) - terminal 13 X4
* Center Channel low level audio signal (-) - terminal 14 X4
锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the
radio.
锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. Ignition OFF, reconnect the X3 harness connector at the amplifier.
4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.
5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 1
2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 443
Circuit Description
When the power seat switches are pressed, they send a 12-volt signal through the switch signal circuits to the memory seat module (MSM). The
MSM then commands the driver seat motors to move in response to the switch signals.
Conditions for Running the DTC
The memory seat module must be powered.
Conditions for Setting the DTC
* If a seat switch circuit is active in one direction and the switch for the opposite direction is pressed, this DTC will set.
* Multiple DTCs will set if one of the switch signal circuits is shorted to voltage.
Action Taken When the DTC Sets
* A motor output driven in response to a switch considered failed, is deactivated for both directions.
* All memory recall commands are ignored.
* The MSM will respond to any other switch signal that has not set a DTC.
Conditions for Clearing the DTC
* The current DTC will clear and set the code to history, 3 seconds after the fault is no longer present and the ignition is cycled OFF then back
to ACC or RUN.
* A history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.
Reference Information
Schematic Reference
Driver Seat Schematics ()
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Memory Seats Description and Operation ()
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 53
* 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
* Control circuit terminal 6 X1
* Control circuit terminal 8 X1
* Control circuit terminal 7 X1
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.
4. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground on the SDM side of the connector:
* Control circuit terminal 5 X1
* Control circuit terminal 6 X1
* Control circuit terminal 7 X1
* Control circuit terminal 8 X1
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.
5. Install a 3 A fused jumper wire between the control circuit terminals listed below.
* Passenger instrument panel airbag stage 1 terminal 5 and 6 X1
* Passenger instrument panel airbag stage 2 terminal 8 and 7 X1
6. 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.
7. Disconnect the passenger instrument panel air bag harness connector.
8. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the air bag.
9. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:
* Control circuit terminal A1
* Control circuit terminal A2
* Control circuit terminal B1
* Control circuit terminal B2
锟斤拷 If greater than the specified range, test the control circuit for a short to voltage.
10. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:
* Control circuit terminal A1
* Control circuit terminal A2
* Control circuit terminal B1
* Control circuit terminal B2
锟斤拷 If less than the specified range, test the control circuit for a short to ground.
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