2010 Cadillac Truck SRX FWD V6-3.0L Page 1537

2010 Cadillac Truck SRX FWD V6-3.0L Page 1537

瀚慖f a condition is found, repair as necessary.

Repair Instructions

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

Throttle Body Assembly Replacement (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and

Repair/Removal and Replacement)Throttle Body Assembly Replacement (LAU) (See: Powertrain Management/Fuel Delivery and Air

Induction/Throttle Body/Service and Repair/Removal and Replacement)

P0507

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.

Action Taken When the DTC Sets

DTCs P0506 and P0507 are Type B DTCs.