2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1061

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1061

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 35616 Connector Test Adapter Kit

Circuit/System Verification

1. Engine idling, DTC P0111, P0112, P0113, or P0114 should not set.

2. 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. Ignition OFF, disconnect the harness connector at the B65 Intake Manifold Pressure and Air Temperature sensor.

2. Remove the fuse that supplies B+ to terminal 56 X2 of the ECM.

Caution: Do NOT use a test lamp to test the continuity of the circuit. Damage to the control module may occur due to excessive current

draw.

3. 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 low reference circuit terminal 1 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance, or for a short to voltage. If the

circuit/connections test normal, replace the K20 ECM.

4. Install fuse that supplies B+ to terminal 56 X2 of the ECM.

5. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K20 ECM.

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 K20 ECM.

6. Ignition ON, verify that the scan tool IAT sensor parameter is colder than -39掳C (-38掳F).

瀚慖f warmer than the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit/connections test normal, replace

the K20 ECM.

Note: If the fuse in the jumper wire opens, the signal circuit is shorted to a voltage and the sensor may be damaged.

7. Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the IAT sensor parameter is warmer

than 128掳C (263掳F).

瀚慖f colder than the specified value, test the signal circuit terminal 2 for an open or short to voltage. If the circuit/connections test normal,

replace the K20 ECM.

8. Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal 2 and the 5 V reference circuit terminal 3.

Verify the IAT sensor parameter is colder than -39掳C (-38掳F).

瀚慖f warmer than the specified value, test the signal circuit for a short to ground. If the circuit/connections test normal, replace the K20

ECM.

9. If all circuits/connections test normal, test or replace the B65 Intake Manifold Pressure and Air Temperature sensor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the B65 Intake Manifold Pressure and Air Temperature sensor.

Note: A thermometer can be used to test the sensor off the vehicle.

2. Test the IAT sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the Temperature

Versus Resistance - Intake Air Temperature Sensor (See: Powertrain Management/Computers and Control

Systems/Specifications/Temperature Versus Resistance - Intake Air Temperature Sensor) table and verify that the resistance is within 5 % of