2010 Cadillac CTS Sedan AWD V6-3.0L Page 1822
P1516 and P2101
* DTC P1682 is not set.
* The run/crank or powertrain relay voltage is greater than 6 V and reduced power is not active.
* The engine is running or the following conditions are met:
- The engine is not running.
- The ignition voltage is greater than 11 V.
- The TAC system is not in the Battery Saver mode.
- The ECM is commanding the throttle.
- The ECM has learned the minimum throttle position.
* DTC P1516 and P2101 run continuously when the above conditions are met.
P2119
* The ignition is ON.
* The run/crank or powertrain relay voltage is greater than 6 V and reduced power is not active.
* The system is in the Battery Save mode.
* DTC P2119 runs continuously when the above conditions are met.
P2176
* DTCs P0068, P0122, P0123, P0222, P0223 are not set.
* The ignition is ON.
* The run/crank or powertrain relay voltage is greater than 6 V and reduced power is not active.
* The system is not in the Battery Save mode.
* DTC P2176 runs continuously when the above conditions are met.
Conditions for Setting the DTC
P1516
The indicated throttle position does not match the predicted throttle position for greater than 0.5 s.
P2101
The indicated throttle position does not match the predicted throttle position for greater than 0.3 s.
P2119
The ECM determines that the throttle blade did not return to the rest position within 0.720 s.
P2176
The difference between the predicted and the actual throttle position is greater than a calibrated amount for greater than 2 s.
Action Taken When the DTC Sets
* DTCs P1516, P2101, and P2176 are Type A DTCs.
* DTC P2119 is a Type C DTC.
Conditions for Clearing the MIL/DTC
* DTCs P1516, P2101, and P2176 are Type A DTCs.
* DTC P2119 is a Type C DTC.
Diagnostic Aids
* If the Throttle Sweep Test is not available on the scan tool, observe the scan tool TAC Motor parameter while performing the following tests:
- Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times.
- Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the
procedure several times.
The TAC Motor parameter should display Enabled. If Disabled is displayed, continue diagnosis in Circuit/System Testing.
* 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.
* A high resistance condition on the throttle position and throttle actuator control circuits could cause a DTC to set.
* A low battery condition may cause a DTC to set.
