2010 Cadillac CTS Sedan AWD V6-3.6L Page 1013

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1013

Component Testing

Note: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the

Component Testing.

Erratic Signal Test

1. Ignition OFF, remove the B74 MAP sensor.

2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal 1 and the corresponding terminal of the B74 MAP sensor.

3. Install a jumper wire between the low reference circuit terminal 2 of the B74 MAP sensor and ground.

4. Install a jumper wire at terminal 3 of the B74 MAP sensor.

5. Connect a DMM between the jumper wire from terminal 3 of the B74 MAP sensor and ground.

6. Ignition ON, with the J 23738-A - Mityvac or the J 35555 - Metal Mityvac , slowly apply vacuum to the sensor while observing the voltage

on the DMM. The voltage should vary between 0-5 V without any spikes or dropouts.

瀚慖f the voltage reading is erratic, replace the B74 MAP sensor.

Repair Instructions

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

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

P0111

DTC P0111-P0113 (w/LLT)

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 P0111

- Intake Air Temperature (IAT) Sensor Circuit Performance

DTC P0112

- Intake Air Temperature (IAT) Sensor Circuit Low Voltage

DTC P0113

- Intake Air Temperature (IAT) Sensor Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data