Wednesday, June 12, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 526


4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 9 X4 and the low reference circuit terminal 6 X2.



锟斤拷 If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat



cushion heater element/temperature sensor.



锟斤拷 If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits



test normal, replace the seat cushion heater element/temperature sensor.



5. Connect the X1, X2, X4 harness connectors at the RHSM.



6. Disconnect the harness connector at the seat cushion heater element/temperature sensor.



7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.



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



RHSM.



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 RHSM.



8. If all circuits test normal, replace the RHSM.



B2430 0A, B2430 0B, B2430 0C, B2430 0D, B2430 0E, B2430 04, or B2430 1F



1. Ignition OFF, disconnect the X1 harness connector at the RHSM.



Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat



unoccupied, then with the seat occupied.



2. Test for 3.5 - 11.5 Ohms between control circuit terminal 6 and control circuit terminal 2.



锟斤拷 If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heater



element.



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



heater element.



3. Disconnect the X2, X4 harness connectors at the RHSM.



4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 20 X4 and the low reference circuit terminal 8 X2.



锟斤拷 If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat



cushion heater element/temperature sensor.



锟斤拷 If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits



test normal, replace the seat cushion heater element/temperature sensor.



5. Connect the X1, X2, X4 harness connectors at the RHSM.



6. Disconnect the harness connector at the seat cushion heater element/temperature sensor.



7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.



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 RHSM.



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



RHSM.



8. If all circuits test normal, replace the RHSM.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Rear Seat Cushion Heater Replacement ()



* Control Module References (See: Testing and Inspection/Programming and Relearning) for the RHSM replacement, setup, and programming



W/O HP2 With Memory



DTC B2435 or B2440 (w/o HP2 with Memory)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.

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