2010 Cadillac Truck SRX AWD V6-3.0L Page 1535

2010 Cadillac Truck SRX AWD V6-3.0L Page 1535

6. 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.

瀚慖f the DTC resets, replace the ECM.

Repair Instructions

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

* ECM or TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning) for replacement, setup and

programming.

* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).

P0506

DTC P0506 or P0507 (LF1, LFW)

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 P0506

- Idle Speed Low

DTC P0507

- Idle Speed High

Circuit/System Description

The throttle actuator control (TAC) motor is a DC motor that is part of the throttle body assembly. The TAC motor drives the throttle valve. The

engine control module (ECM) controls the TAC motor based on throttle position sensor input. The idle speed is controlled by the ECM based on

various inputs. The ECM commands the TAC motor to open or close the throttle valve in order to maintain the desired idle speed.

Conditions for Running the DTC

* DTCs P0068, P0101, P0102, P0103, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172, P0174, P0175, P0222, P0223,

P0261, P0262, P0264, P0265, P0267, P0268. P0270, P0271, P0273, P0274, P0276, P0277, P0300-P0306, P0351-P0356, P0461-P0464,

P0496, P0627, P0628, P0629, P0722, P1516, P2066-P2068, are not set.

* The barometric pressure (BARO) is greater than 70 kPa.

* The engine coolant temperature (ECT) is greater than 60掳C (140掳F).

* The engine run time is greater than 60 seconds.

* The ignition voltage is between 11-18 volts.

* The transmission is not changing gears.

* The torque converter clutch (TCC) is not changing states.

* The intake air temperature (IAT) is warmer than -20掳C (-4掳F).

* The vehicle speed is less than 3 km/h (2 mph).

* The commanded RPM is steady within 25 RPM.

* The engine is idling for greater than 5 seconds.

* The DTCs run when the above conditions are met.

Conditions for Setting the DTC

P0506

The actual engine speed is 94 RPM less than the desired idle speed for 10 seconds.

P0507

The actual engine speed is 188 RPM greater than the desired idle speed for 10 seconds.