2010 Cadillac Truck SRX AWD V6-3.0L Page 697

2010 Cadillac Truck SRX AWD V6-3.0L Page 697

3. Test for less than 2 ohm between the signal terminal 2 and the ground terminal 3 with the switch in the high beam position.

瀚慖f greater than the specified value, replace the S78 turn signal/multifunction switch.

4. Test for less than 2 ohm between the signal terminal 4 and the ground terminal 3 while holding the switch in the flash to pass position.

瀚慖f greater than the specified value, replace the S78 turn signal/multifunction switch.

Repair Instructions

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

* Turn Signal Multifunction Switch Replacement (See: Lighting and Horns/Sensors and Switches - Lighting and Horns/Turn Signal

Switch/Service and Repair/Turn Signal Multifunction Switch Replacement)

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

B3811

DTC B3811

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 B3811 02

- Rear Washer Relay Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

Rear Washer

When the Body Control Module detects that the Rear wiper/wash switch has activated the momentary Wash switch, it activates a High Side Drive

output which supplies Battery to the coil of the Rear Washer Pump Relay. This energizes the Relay, which switches Battery Power to the Washer

Pump Motor. The BCM will also activate continuous Low Speed Windshield Wipers as described above. This Washer and Wiper operation shall be

continued so long as the switch remains active. Upon termination the Rear Wash Motor will be deactivated and the Wiper shall move to its Park

Position and deactivate.

Conditions for Running the DTC

* Ignition ON.

* The system voltage is between 9-16 V.

Conditions for Setting the DTC

A short to ground is detected in the rear washer relay control circuit.

Action Taken When the DTC Sets

Washer operation is suspended.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1483

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 P0411

- Secondary Air Injection System Incorrect Air Flow Detected

Circuit/System Description

The secondary air injection system aids in the reduction of hydrocarbon emissions during a cold start. The electric air pump forces fresh air into the

exhaust stream in order to accelerate the catalyst operation. An secondary air injection system pressure sensor is used to monitor the air flow from

the secondary air injection pump. The ECM supplies voltage to the 5 V reference circuit and a ground to the low reference circuit. The sensor

provides a signal voltage to the ECM relative to the pressure changes within the secondary air injection system.

Ignition voltage is supplied directly to the secondary air injection pump relay. The ECM controls the relay by grounding the control circuit, which

activates the secondary air injection pump relay. With the relay contacts closed, battery voltage is supplied to the secondary air injection pump.

Conditions for Running the DTC

* DTC P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P0418, P050C, P2227, P2228, P2229,

P2257, or P2258 is not set.

* Greater than 60 min has elapsed since the last cold start.

* The secondary air injection system has been commanded ON and OFF during the ignition cycle.

* The battery voltage is between 10-18 V.

* The engine speed is between 680-3,500 RPM.

* The Intake Air Temperature (IAT) is between -12 to +80掳C (10.4-176掳F).

* The Engine Coolant Temperature (ECT) is between -10.5 to +69.8掳C (13-158掳F).

* The Mass Air Flow (MAF) is less than 100 g/s.

* Catalyst heating is active.

* The Barometric Pressure (BARO) is less than 68 kPa (9.9 psi).

* The difference between intake air temp and engine coolant start temp is less than 15掳C (27掳F).

* DTC P0411 runs once per ignition cycle when the above conditions are met.

Conditions for Setting the DTC

* The ratio of the calculated secondary air mass flow to the modeled secondary air mass flow is less than 0.75 or greater than 1.2.

* DTC P0411 sets within 60 s when the above condition is met.

Action Taken When the DTC Sets

DTC P0411 is a Type B DTC.

Conditions for Clearing the DTC

DTC P0411 is a Type B DTC.

Reference Information

Schematic Reference

Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Secondary Air Injection System Description (See: Powertrain Management/Emission Control Systems/Air Injection/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

2010 Cadillac Truck SRX AWD V6-3.0L Page 1266

2010 Cadillac Truck SRX AWD V6-3.0L Page 1266

瀚慖f the circuits test normal, replace the K20 ECM.

Note: Testing for the following steps is performed on the fuel injector side of the multi-way harness connector. It may be necessary to

remove the intake manifold to isolate the condition.

4. Ignition OFF, measure the resistance between the appropriate high voltage supply circuit and ground. The DMM should display OL ohm.

瀚慖f less than the specified range, test the high voltage supply circuit and the high voltage control circuit for a short to ground. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

5. Test for 2-3 ohm between the appropriate high voltage supply circuit and high voltage control circuit.

瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).

瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the

circuits/connections test normal, test or replace the appropriate Q17 fuel injector.

Component Testing

* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection

)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and

Inspection)

* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)

Repair Instructions

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

* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)

* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)

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

P0203

DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277

(LF1)

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 P0201

- Cylinder 1 Injector Control Circuit

DTC P0202

- Cylinder 2 Injector Control Circuit

DTC P0203

- Cylinder 3 Injector Control Circuit

DTC P0204

- Cylinder 4 Injector Control Circuit

DTC P0205

- Cylinder 5 Injector Control Circuit

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1412

* Knock Sensor Replacement - Bank 1 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and

Repair/Knock Sensor Replacement - Bank 1)

* Knock Sensor Replacement - Bank 2 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and

Repair/Knock Sensor Replacement - Bank 2)

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

Repair Verification

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

P0325

DTC P0324-P0328, P0330-P0333, P06B6, or P06B7 (LF1)

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 P0324

- Knock Sensor System Performance

DTC P0325

- Knock Sensor Circuit Bank 1

DTC P0326

- Knock Sensor Performance Bank 1

DTC P0327

- Knock Sensor Circuit Low Voltage Bank 1

DTC P0328

- Knock Sensor Circuit High Voltage Bank 1

DTC P0330

- Knock Sensor Circuit Bank 2

DTC P0331

- Knock Sensor Performance Bank 2

DTC P0332

- Knock Sensor Circuit Low Voltage Bank 2

DTC P0333

- Knock Sensor Circuit High Voltage Bank 2

DTC P06B6

- Control Module Knock Sensor Processor 1 Performance

DTC P06B7

- Control Module Knock Sensor Processor 2 Performance

Diagnostic Fault Information

Circuit/System Description

The knock sensor system enables the engine control module (ECM) to control the ignition timing for the best possible performance while protecting

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2010 Cadillac Truck SRX AWD V6-3.0L Page 223

Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.

* The DTC will be a history DTC when the voltage is present and the power mode is OFF or ACC or when voltage is not present and the

power mode is RUN or CRANK.

* A history DTC will clear after 50 ignition cycles.

Diagnostic Aids

Verify that DTC B144B is not set prior to performing extensive electrical diagnostics.

Reference Information

Schematic Reference

* Column Lock Schematics (See: Diagrams/Electrical Diagrams/Steering/Steering Column)

* Power Moding Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System

Diagram/Power Moding Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Steering Wheel and Column Description and Operation (See: Steering and Suspension/Steering/Steering Column/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)

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 KR73 RUN/CRNK relay.

2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 87A and ground.

瀚慖f the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K60 Steering Column Lock

Control Module.

3. Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for an open/high resistance.

4. Ignition OFF, disconnect the harness connector at the K60 steering column lock control module.

5. Connect a test lamp between the voltage circuit terminal 3 and ground.

6. Ignition ON, connect a 5 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87A. Verify the test lamp is

illuminated.

瀚慖f the test lamp is not illuminated and the control circuit fuse is good, test the control circuit for an open/high resistance.

瀚慖f the test lamp is not illuminated and the control circuit fuse is open, test the control circuit for a short to ground. If the circuit tests

normal, replace the K60 steering column lock control module.

7. If all circuits test normal, test or replace the KR73 RUN/CRNK relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the KR73 RUN/CRNK relay.

2. Test for 60-200 ohm between terminals 85 and 86.

瀚慖f not within the specified range, replace the KR73 RUN/CRNK relay.

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replace the K9 BCM.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

4. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal C 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 K9 BCM.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

5. If all circuits test normal, test or replace the B18 battery current sensor.

B1516 66

1. Verify that the B18 battery current sensor is installed securely around the negative battery cable, with the tape tab pointing away from the

negative terminal on the C1 battery.

瀚慖f the B18 battery current sensor is not installed correctly, remove and reinstall the sensor properly.

2. Replace the B18 battery current sensor.

Repair Instructions

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

* Battery Positive and Negative Cable Replacement (LF1) (See: Starting and Charging/Battery/Battery Cable/Positive/Service and

Repair/Battery Positive and Negative Cable Replacement)Battery Positive and Negative Cable Replacement (LAU) (See: Starting and

Charging/Battery/Battery Cable/Positive/Service and Repair/Battery Positive and Negative Cable Replacement)

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

B1517

DTC B1517

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 B1517 03

- Battery Voltage Below Threshold

DTC B1517 07

- Battery Voltage Above Threshold

DTC B1517 5A

- Battery Voltage Plausibility Failure

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) has designated circuits for monitoring vehicle system voltage. The BCM monitors the system voltage to ensure

that the voltage stays within the proper range. Damage to components, and incorrect data may occur when the system voltage is out of range. The

BCM monitors the system voltage over an extended length of time.

Conditions for Running the DTC

* The BCM has power and ground.

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2010 Cadillac Truck SRX AWD V6-3.0L Page 99

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 B018A 02

- Windshield Temperature Sensor Circuit Short to Ground

DTC B018A 05

- Windshield Temperature Sensor Circuit High Voltage/Open

DTC B048C 02

- Humidity Sensor Humidity Circuit Short to Ground

DTC B048C 05

- Humidity Sensor Humidity Circuit High Voltage/Open

DTC B048F 02

- Humidity Sensor Temperature Circuit Short to Ground

DTC B048F 05

- Humidity Sensor Temperature Circuit High Voltage/Open

DTC B1395 03

- Control Module Voltage Reference Output Circuit Low Voltage

DTC B1395 07

- Control Module Voltage Reference Output Circuit High Voltage

Circuit/System Description

The windshield temperature and inside moisture sensor includes the relative humidity sensor, windshield temperature sensor and humidity sensing

element temperature sensor.

This sensor assembly provides information about:

* Relative humidity level at windshield inside

* Temperature of the windshield inside

* Temperature of the humidity sensor element

The relative humidity sensor measures the relative humidity of the compartment side of the windshield. It also detects the temperature of the

windshield surface on the compartment side. Both values are used as control inputs for the HVAC control module application to calculate the fog

risk on windshield compartment side and ability to reduce fuel consumption by decreasing A/C compressor power to a minimum without causing

any fog. The sensor will also enable partial recirculation mode in order to improve heat-up performance of the passenger compartment under cold

ambient temperature conditions without the risk of mist build-up on the windshield. The humidity sensor element temperature sensor supplies the

temperature of the humidity sensor element. It is only needed if the thermal contact between the humidity sensing element and the inside windshield

surface is not sufficient.

Conditions for Running the DTC

* Ignition ON.

* The HVAC control module is ON.

Conditions for Setting the DTC

B018A 02, B048C 02, B048C 02 or B1395 03

The HVAC control module detects the sensor signal out of range. The signal voltage is less than 0.1 V for more than 50 ms.

B018A 05, B048C 05, B048C 05 or B1395 07

The HVAC control module detects the sensor signal out of range. The signal voltage is greater than 4.9 V for more than 50 ms.

Action Taken When the DTC Sets

* The system will use the last valid values as default.

* If no value is read at the time of fault, the HVAC control module uses 60% for humidity.