2010 Cadillac Truck SRX AWD V6-3.0L Page 385

2010 Cadillac Truck SRX AWD V6-3.0L Page 385

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Measure actual temperature using a thermometer at each of the duct temperature sensors. Compare this value to the appropriate scan tool Duct

Actual parameter. The measured temperature should be within 5掳C (9掳F) difference of appropriate Duct Actual parameter value.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 10 ohm between the temperature sensor ground circuit terminal B and ground.

瀚慖f greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the K33 HVAC

Control Module.

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

瀚慖f less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the

K33 HVAC Control Module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K33 HVAC Control

Module.

4. If all circuits test normal, replace the temperature sensor.

Repair Instructions

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

* HVAC Component Replacement Reference (See: Heating and Air Conditioning/Service and Repair/Removal and Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning)

B0550

DTC B0550

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.

DTC Descriptor

DTC B0550 32

- Odometer Circuit General Memory Malfunction

Circuit/System Description

The instrument cluster is equipped with odometers that indicate the distance traveled by the vehicle. One type of odometer is the season odometer

where the traveled distance can not be reset by the driver. This information is also stored in the body control module (BCM). In addition to storing

the season odometer value for the vehicle, the instrument cluster and the BCM store the VIN. Software checks are performed to ensure these

modules, and their stored season odometer information, can not be moved or transferred between different vehicles.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The BCM has detected an internal memory malfunction.

2010 Cadillac Truck SRX AWD V6-3.0L Page 522

2010 Cadillac Truck SRX AWD V6-3.0L Page 522

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the X2, X3 harness connectors at the K29 seat heating control module.

2. Test for greater than 3.0 kOhms between the signal and the low reference circuits listed below:

* E14B driver seat cushion terminal 3 X3 and terminal 13 X2

* E14D passenger seat cushion terminal 4 X3 and terminal 14 X2

瀚慖f less than the specified value, test for a short between the signal and low reference circuits. If the circuits test normal, replace the

appropriate E14 seat cushion heating element.

3. If all circuits test normal, replace the K29 seat heating control module.

Repair Instructions

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

* Driver or Passenger Seat Cushion Heater Replacement (See: Body and Frame/Seats/Seat Temperature Element/Service and Repair/Driver or

Passenger Seat Cushion Heater Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for seat heating control module replacement, setup

and programming

With KA6

DTC B2345 (With KA6)

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.

DTC Descriptors

DTC B2345 13

- Seat Heater Disable Circuit Low Voltage High/Temperature

Diagnostic Fault Information

Circuit/System Description

The rear seat heating control module controls seat heating operation for both left and right rear seats. The heating elements are controlled through

individual high side and low side control circuits. The low side control circuits for both seats are connected to a common reference point internal to

2010 Cadillac Truck SRX AWD V6-3.0L Page 506

2010 Cadillac Truck SRX AWD V6-3.0L Page 506

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate driver seat motor listed below for which the DTC set:

* M50 seat front vertical motor

* M55 seat rear vertical motor

* M51 seat horizontal motor

* M56 seat back recline motor

2. Ignition ON, test for B+ between the 12 V reference circuit terminal 4 and ground.

瀚慖f less than the specified value, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K40 seat memory control module.

3. Test for 0.3 - 2 V between the signal circuit terminal 2 and ground.

瀚慖f 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 K40 seat memory control module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K40 seat memory

control module.

4. If all circuits test normal, replace the seat motor.

Repair Instructions

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

* Driver or Passenger Seat Cushion Frame Replacement (See: Body and Frame/Seats/Service and Repair/Removal and Replacement/Driver or

Passenger Seat Cushion Frame Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for seat memory control module replacement, setup,

and programming

Without Memory A45

DTC B1925 or B2170 (Without Memory A45)

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.

DTC Descriptors

DTC B1925 02

- Driver Seat Cushion Heater Sensor Circuit Short to Ground

DTC B1925 05

- Driver Seat Cushion Heater Sensor Circuit High Voltage/Open

DTC B2170 02

- Passenger Seat Cushion Heater Sensor Circuit Short to Ground

DTC B2170 05

- Passenger Seat Cushion Heater Sensor Circuit High Voltage/Open

Diagnostic Fault Information

2010 Cadillac Truck SRX AWD V6-3.0L Page 1114

2010 Cadillac Truck SRX AWD V6-3.0L Page 1114

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

J 38522 Variable Signal Generator

Circuit/System Verification

1. Verify that the following DTCs are not set:

* 5 V reference circuits

* Camshaft position system performance

* Engine controls ignition relay circuits

* Ignition circuits-Body control module (BCM)

瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust (See: Engine, Cooling and Exhaust/Exhaust

System/Testing and Inspection/Restricted Exhaust).

3. Engine operating at idle, observe the scan tool MAF Sensor parameter. The reading should be between 2,000-3,800 Hz depending on the

ECT.

4. A wide open throttle (WOT) acceleration from a stop should cause the MAF Sensor parameter on the scan tool to increase rapidly. This

increase should be from 2-6 g/s at idle to greater than 180 g/s at the time of the 1-2 shift.

5. Use the scan tool and compare the MAF Sensor parameter to a known good vehicle, under various operating conditions.

6. Verify the proper operation of the ECT and IAT sensors. A skewed or stuck ECT or IAT sensor will cause the calculated models to be

inaccurate and may cause this DTC to run when it should not. Refer to Temperature Versus Resistance - Intake Air Temperature Sensor (

See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance - Intake Air Temperature

Sensor).

7. Verify the proper operation of the MAP sensor. A skewed MAP sensor will cause the BARO value to be inaccurate. Refer to DTC P0106

(LF1) (See: P Code Charts/P0106).

8. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Verify the integrity of the entire air induction system by inspecting for the following conditions:

* Any damaged components

* Loose or improper installation

* An air flow restriction

* Any vacuum leaks

* Water intrusion

* In cold climates, inspect for any snow or ice buildup

* Inspect the B75B MAF/IAT sensor element for contamination.

2. Ignition OFF, disconnect the harness connector at the B75B MAF/IAT sensor.

3. Ignition OFF, remove the fuse that supplies B+ to terminal 52 X1 of the ECM.

4. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 ohm

between the ground circuit terminal B and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

5. Install fuse that supplies B+ to terminal 52 X1 of the ECM.

6. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal C and ground.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

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

瀚慖f 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