2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1819
DTC P0638
- Throttle Actuator Control (TAC) Command Performance
DTC P2100
- Throttle Actuator Control (TAC) Motor Control Circuit
DTC P2101
- Throttle Actuator Position Performance
DTC P2102
- Throttle Actuator Control (TAC) Motor Control Circuit Low Voltage
DTC P2103
- Throttle Actuator Control (TAC) Motor Control Circuit High Voltage
DTC P2119
- Throttle Closed Position Performance
Diagnostic Fault Information
Circuit/System Description
The Engine Control Module (ECM) controls the throttle valve by applying a varying voltage to the control circuits of the throttle actuator control
(TAC) motor. The ECM monitors the duty cycle that is required to actuate the throttle valve. The ECM monitors the throttle position sensors 1 and
2 to determine the actual throttle valve position.
Conditions for Running the DTCs
P0638
* The ignition is ON or the engine is operating.
* The ignition voltage is greater than 8 V.
* The engine speed is greater than 400 rpm.
* The engine coolant temperature (ECT) is greater than 5掳C (41掳F).
* The intake air temperature (IAT) is 5掳C (41掳F).
* Throttle position adaptation is not active.
* DTCs P0638 run continuously once the above conditions are met for greater than 5 s.
P2100-P2103
* The ignition voltage is greater than 8 V.
* The ignition is ON or the engine is operating.
* DTC P2100-P2103 runs continuously once the above conditions are met.
P2119
* DTC P0111, P0112, P0113, P0116, P0117, P0118, P0119, P0700, P2122, P2123, P2127, P2128, or P2138 is not set.
* The vehicle speed is 0 km/h (0 mph).
* The engine speed is less than 250 RPM.
* The engine coolant temperature (ECT) is 5-85掳C (41-185掳F).
* The intake air temperature (IAT) is 5-60掳C (41-140掳F).
* The ignition voltage is greater than 8 V.
* The accelerator pedal position (APP) is less than 15 percent.
* DTC P2119 runs once per ignition cycle when the above conditions are met for less than 1 s.
Conditions for Setting the DTC
P0638
* The ECM detects that the commanded duty cycle for the range test high is greater than 80 percent for greater than 1 s.
OR
* The ECM detects that the commanded duty cycle for the range test low is greater than 80 percent for greater than 5 s.
P2100
The ECM detects the output circuit for the TAC motor is open, shorted to ground, or shorted to a voltage. The condition exists fro greater than 1 s.
