DTC P1515. Saturn VUE

For 1990-2009 cars only

Makes 🢒 Saturn 🢒 2002 🢒 VUE - AWD 🢒 Engine 🢒 Engine Controls - 2.2L (L61) 🢒 DTC P1515

Engine Controls Component Views
Engine Controls Schematics

Circuit Description

The commanded throttle position is compared to the actual throttle position. Both values should be within a calibrated range of each other. The engine control module (ECM) continuously monitors the commanded and actual throttle positions. If the ECM detects that the difference in these values are greater than the calibrated range, DTC 1515 will set.

Conditions for Running the DTC

•	The ignition is ON.

•	The system is not in Battery Saver Mode.

•	DTC P1514 is not set.

•	The battery voltage is more than 8 volts.

Conditions for Setting the DTC

The difference between the predicted and the actual throttle position is more than a calibrated amount.

Action Taken When the DTC Sets

•	The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.

•	The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame and/or the Failure Records.

•	The control module commands the TAC system to operate in the Reduced Engine Power mode.

•	A message center or an indicator displays Reduced Engine Power.

•	Under certain conditions the control module commands the engine OFF.

Conditions for Clearing the MIL/DTC

•	The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.

•	A current DTC, Last Test Failed, clears when the diagnostic runs and passes.

•	A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.

•	Clear the MIL and the DTC with a scan tool.

Diagnostic Aids

•	Inspect for a condition in which the throttle valve may have been held open.

•	Inspect for conditions in which ice may have formed in the throttle bore.

•	If the condition is intermittent, refer to Intermittent Conditions .

Test Description

The number below refers to the step number on the diagnostic table.

The throttle valves are spring loaded in a slightly open position and should move in either direction without binding. The throttle valves should always be under spring pressure.

Step

Action

Value

Yes

Schematic Reference: Engine Controls Schematics

Connector End View Reference: Engine Controls Connector End Views or Engine Control Module Connector End Views

Did you perform the Diagnostic System Check-Engine Controls?

Go to Step 2

Go to Diagnostic System Check - Engine Controls

Observe the DTC information.

Are DTCs P1120, P1220 or P1221 also set?

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

Turn OFF the ignition.
Visually inspect the throttle body for the following conditions:

•	Throttle valves that are NOT in the rest position

•	Throttle valves that are binding open or closed

•	Throttle valves that are free to move open or closed WITHOUT spring pressure--Refer to Diagnostic Aids.

Did you find any of these conditions with the throttle body?

Go to Step 11

Go to Step 4

Important: Disconnecting the throttle body connector will cause additional codes to set.

Disconnect the throttle body connector.
Turn ON the ignition, with the engine OFF.
Measure the voltage of the TAC motor control 1 and TAC motor control 2 circuits of the throttle actuator motor with a DMM connected to ground.

Is the voltage more than the specified value for both circuits?

11 V

Go to Step 8

Go to Step 5

Is the voltage less than the specified value?

2 V

Go to Step 7

Go to Step 6

Test the TAC motor control circuit that measured above the specified value for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.