2010 Cadillac CTS Sedan AWD V6-3.0L Page 1542
Conditions for Running the DTCs
P0638 and P2101
* The ignition is ON or the engine is operating.
* The ignition voltage is greater than 7 V.
* Throttle position adaptation is not active.
* DTCs P0638 and P2101 run continuously once the above conditions are met for greater than 5 s.
P2100
* Before the ECM can report DTC P2100 failed, DTC P2101 must run and pass.
* The ignition is ON or the engine is operating.
* DTC P2100 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 ignition is ON.
* The vehicle speed is 0 km/h (0 mph).
* The engine speed is less than 40 RPM.
* The engine coolant temperature (ECT) is 5-100掳C (41-212掳F).
* The intake air temperature (IAT) is 5-143掳C (41-290掳F).
* The ignition voltage is greater than 10 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 second.
Conditions for Setting the DTC
P0638
* The ECM detects that the commanded duty cycle for the range test high is greater than 80 percent.
OR
* The ECM detects that the commanded duty cycle for the range test low is greater than 80 percent.
* Either condition exists for greater than 1 second, or a cumulative of 10 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.
P2101
The ECM detects a 4-50 percent difference between the commanded and the actual throttle plate position, dependant upon the rate of commanded
throttle movement. The condition exists for 1 s.
P2119
The ECM determines that the throttle valve did not return to the rest position within 1 second. The condition exists for greater than 1 s.
Action Taken When the DTC Sets
DTCs P0638, P2100, P2101, and P2119 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0638, P2100, P2101, and P2119 are Type A DTCs.
Diagnostic Aids
Inspect for a condition in which the throttle valve may have been held open. For example, ice may have formed in the throttle bore causing the
throttle valve not to close.
Reference Information
Schematic Reference
Engine Controls Schematics (LLT) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Throttle Actuator Control (TAC) System Description (See: Powertrain Management/Computers and Control Systems/Description and
