2010 Cadillac Truck SRX AWD V6-3.0L Page 1458

2010 Cadillac Truck SRX AWD V6-3.0L Page 1458

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

normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.

5. Engine running, observe the Ignition Coil 1-6 Control Circuit Low Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for open or short to ground.

6. Engine running, observe the Ignition Coil 1-6 Control Circuit Open Test Status on the scan tool. Test Status should be Ok or Not Run.

瀚慖f test status is Malfunction test for open circuit.

7. Engine running, observe the Ignition Coil 1 6 Control Circuit High Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for short to voltage.

8. If all circuits test normal, test or replace the T8 ignition coil.

Repair Instructions

* T8 Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 1)

* T8 Ignition Coil Replacement - Bank 2 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 2)

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

Repair Verification

Note: An ignition control circuit fault condition will result in an engine misfire, and under certain driving conditions could possibly overheat the

3-way catalytic converter.

1. Install any components or connectors that have been removed or replaced during diagnosis.

2. Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.

3. Clear the DTCs.

4. Turn the ignition OFF for 60 s.

5. If the repair is related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in

order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle

(See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) and perform the appropriate diagnostic

procedure.

6. To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair

Verification for DTC P0420 or P0430.

P0352

DTC P0351-P0356 (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 P0351

- Ignition Coil 1 Control Circuit

DTC P0352

- Ignition Coil 2 Control Circuit

DTC P0353

- Ignition Coil 3 Control Circuit

DTC P0354

- Ignition Coil 4 Control Circuit

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2010 Cadillac Truck SRX AWD V6-3.0L Page 374

瀚慖f the test lamp does not illuminate, test the 12 volt referance circuit for a short to ground or an open/high resistance. If the circuit tests

normal test or replace the K33 HVAC control module.

Actuator Malfunction

1. Ignition OFF, disconnect the X3 and X4 harness connector at the K33 HVAC Control Module.

2. Ignition ON, test for 80-200 ohm between the 12 V reference voltage circuit terminal 15 X3 and each control circuit terminal of the

appropriate actuator.

瀚慖f less than the specified range, test for the 12 V reference voltage circuit and the control circuit for a short circuit. If the circuits test

normal, replace the appropriate actuator.

瀚慖f greater than the specified range, test the 12 V reference voltage circuit and the control circuit for an open/high resistance. If the circuits

test normal, replace the appropriate actuator.

3. If all circuits test normal, replace the K33 HVAC Control Module

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) for HVAC control module replacement, setup, and

programming

B0418

DTC B0223, B022A, B0233, B023A, B0408, B0418, B0428, or B3531

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 B0223 01

- Recirculate Position Command 1 Circuit Short to Battery

DTC B0223 06

- Recirculate Position Command 1 Circuit Low Voltage/Open

DTC B022A 01

- Recirculate Position Command 2 Circuit Short to Battery

DTC B022A 06

- Recirculate Position Command 2 Circuit Low Voltage/Open

DTC B0233 01

- Air Flow Control Circuit Short to Battery

DTC B0233 06

- Air Flow Control Circuit Low Voltage/Open

DTC B023A 02

- HVAC Actuators Supply Voltage Short to Ground

DTC B0408 01

- Main Temperature Control Circuit Short to Battery

DTC B0408 06

- Main Temperature Control Circuit Low Voltage/Open

DTC B0418 01

- Right Temperature Control Circuit Short to Battery

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2010 Cadillac Truck SRX AWD V6-3.0L Page 215

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

7. Test for less than 1 V between the display position signal circuit terminal 5 and ground.

瀚慽f greater than the specified range, test the position signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

8. Connect a DMM between the display control circuit terminal 4 and ground. Press and release the NAV button on the Radio/HVAC Control.

Verify the voltage changes each time the display button is pressed. The value should change between less than 1 V to greater than 4 V.

瀚慖f the value is always less than 1 V, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the radio.

瀚慖f the value is always greater than 1 V, test the control circuit for a short to voltage. If the circuit tests normal replace the radio.

9. If all circuits test normal, replace the Radio/HVAC display actuator.

Repair Instructions

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

* Radio, Video, Audio Disc Player, and Navigation Information Display Actuator Replacement (See: Accessories and Optional

Equipment/Radio, Stereo, and Compact Disc/Radio/Stereo/Service and Repair/Radio, Video, Audio Disc Player, and Navigation Information

Display Actuator Replacement)

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

B138A

DTC B138A

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 B138A 03

- Control Module Voltage Reference Output Circuit Low Voltage

DTC B138A 07

- Control Module Voltage Reference Output Circuit High Voltage

Diagnostic Fault Information

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2010 Cadillac Truck SRX AWD V6-3.0L Page 1109

瀚慖f the test lamp does not illuminate, test the low control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the K20 ECM.

7. If all circuits test normal, test or replace the G18 high pressure fuel pump.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the G18 high pressure fuel pump.

Note: The DMM and test leads must be calibrated to 0 ohm in order to prevent misdiagnosis.

2. Test for 9-11 ohm at 25掳C (77掳F) between the low control circuit terminal 1 and the high control circuit terminal 2.

瀚慖f not within the specified range, replace the G18 high pressure fuel pump.

3. Measure the resistance between each terminal and the high pressure fuel pump housing. The DMM should display OL.

瀚慖f less than the specified value, replace the G18 high pressure fuel pump.

Repair Instructions

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

* Fuel Pump Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Service and Repair/Fuel Pump

Replacement)

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

P0100

DTC P0100-P0103 (LAU)

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 P0100

- Mass Air Flow (MAF) Sensor Circuit

DTC P0102

- Mass Air Flow (MAF) Sensor Circuit Low Frequency

DTC P0103

- Mass Air Flow (MAF) Sensor Circuit High Frequency

Diagnostic Fault Information

Circuit/System Description

The mass air flow (MAF) sensor is located in the air intake duct. The MAF sensor is an airflow meter that measures the amount of air that enters the

engine. The MAF sensor uses a hot film that is cooled by air flowing past the sensing film as air enters the engine. The amount of cooling is

proportional to the amount of the air flow. As the air flow increases, more current is required in order to maintain the hot film at a constant

temperature. The engine control module (ECM) uses the MAF sensor in order to provide the correct fuel delivery for all operating conditions.

Conditions for Running the DTC

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2010 Cadillac Truck SRX AWD V6-3.0L Page 315

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

3. Ignition OFF, connect the X1 harness connector K9 BCM

4. Ignition OFF, disconnect the inline harness connector listed below:

* E4C daytime running lamp - left X111 inline harness connector

* E4D daytime running lamp - right X116 inline harness connector

5. Connect a test lamp between the control circuit terminal G and ground.

6. Command the appropriate Dedicated Daytime Running Lamp ON and OFF with a scan tool. The test lamp should turn ON and OFF when

changing between the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace

the K9 BCM.

7. If all circuits test normal, replace the daytime running lamp bulb.

Repair Instructions

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

* Daytime Running Lamp Bulb Replacement (TT6,TT7,TT8 Passenger Side Headlamp) (See: Lighting and Horns/Daytime Running

Lamp/Service and Repair/Daytime Running Lamp Bulb Replacement (TT6,TT7,TT8 Passenger Side Headlamp))Daytime Running Lamp

Bulb Replacement (T84, T85 Passenger Side Headlamp) (See: Lighting and Horns/Daytime Running Lamp/Service and Repair/Daytime

Running Lamp Bulb Replacement (T84, T85 Passenger Side Headlamp))Daytime Running Lamp Bulb Replacement (T84, T85 Driver Side

Headlamp) (See: Lighting and Horns/Daytime Running Lamp/Service and Repair/Daytime Running Lamp Bulb Replacement (T84, T85

Driver Side Headlamp))Daytime Running Lamp Bulb Replacement (TT6,TT7,TT8 Driver Side Headlamp) (See: Lighting and

Horns/Daytime Running Lamp/Service and Repair/Daytime Running Lamp Bulb Replacement (TT6,TT7,TT8 Driver Side Headlamp))

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

B270A

DTC B270A

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 B270A 01

- Park Lock Solenoid Control Circuit Short to Voltage

DTC B270A 02

- Park Lock Solenoid Control Circuit Short to Ground

DTC B270A 04

- Park Lock Solenoid Control Circuit Open

Diagnostic Fault Information

Circuit/System Description

The body control module controls the automatic transmission park lock control solenoid by providing a battery positive voltage to the solenoid. The

body control module controls the voltage supply circuit to the automatic transmission park lock control solenoid. The BCM monitors the voltage