2010 Cadillac Truck SRX FWD V6-3.0L Page 239

2010 Cadillac Truck SRX FWD V6-3.0L Page 239

Schematic Reference

Instrument Cluster Schematics (See: Diagrams/Electrical Diagrams/Instrument Panel, Gauges and Warning Indicators/System Diagram/Instrument

Cluster Schematics)

Connector End View Reference

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

Description and Operation

Instrument Cluster Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and Operation/Instrument

Cluster)

Driver Information Center (DIC) Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and

Operation/Driver Information Center (DIC))

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 Verification

Ignition ON, observe the scan tool Ambient Air Temperature parameter. The reading should be between -40掳C (-40掳F) to +88掳C (+190掳F) and

change with air temperature changes.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B9 Ambient Air Temperature Sensor.

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

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the P16 Instrument

Cluster.

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 P16 Instrument Cluster.

3. Install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Ambient

Air Temperature parameter displays greater than 54 掳C (130 掳F).

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

replace the P16 Instrument Cluster.

4. If all circuits test normal, test or replace the B9 Ambient Air Temperature Sensor.

Component Testing

Static Test

1. Test the B9 Ambient Air Temperature Sensor by varying the sensor temperature while monitoring the sensor resistance.

2. Compare the readings with the Ambient Air Temperature Sensor Resistance (See: Heating and Air Conditioning/Ambient Temperature

Sensor / Switch HVAC/Specifications).

瀚慖f not within the specified range, replace the B9 Ambient Air Temperature Sensor.

Repair Instructions

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

* Ambient Air Temperature Gauge Sensor Replacement (See: Instrument Panel, Gauges and Warning Indicators/Outside Temperature

Display/Outside Temperature Display Sensor/Service and Repair)

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