Captiva |
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• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
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.
• | 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°C (140°F). |
• | The engine run time is greater than 60 s. |
• | The ignition voltage is between 11-18 V. |
• | The transmission is not changing gears. |
• | The torque converter clutch (TCC) is not changing states. |
• | The intake air temperature (IAT) is warmer than -20°C (-4°F). |
• | The vehicle speed is less than 3 km/h (2 MPH). |
• | The commanded engine speed is steady within 25 RPM. |
• | The engine is idling for greater than 5 s. |
• | The DTCs run when the above conditions are met. |
The actual engine speed is 94 RPM less than the desired idle speed for 10 s.
The actual engine speed is 188 RPM greater than the desired idle speed for 10 s.
DTCs P0506 and P0507 are Type B DTCs.
DTCs P0506 and P0507 are Type B DTCs.
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
⇒ | If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis. |
Verify none of the following conditions exist:
• | Excess deposits in the Q38 throttle body. Refer to Throttle Body Inspection and Cleaning . |
• | Restricted exhaust |
• | Mechanical conditions that limits engine speed |
• | Parasitic load on the engine--For example, a transmission condition, a belt driven accessory condition. |
⇒ | If a condition is found, repair as necessary. |
• | Vacuum leaks |
• | A throttle valve that does not close correctly |
• | Verify the correct operation of the crankcase ventilation system. Inspect for the following conditions: |
- | The routing of the positive crankcase ventilation (PCV) system |
- | Vacuum leaks in the PCV system--Refer to Crankcase Ventilation System Inspection/Diagnosis . |
⇒ | If a condition is found, repair as necessary. |
Perform the Diagnostic Repair Verification after completing the repair.
Throttle Body Assembly Replacement : LF1 or LFW
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