GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2001 🢒 Firebird 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 DTC P1519

Circuit Description

The throttle position (TP) sensor 1 signal is fed into a multiplier (5X) to produce a high resolution calculated TP sensor voltage. This higher resolution TP sensor voltage is used for actuator control in low throttle angle conditions.

Conditions for Running the DTC
    • DTCs P0606, P1517, or P1518 are not set.
    • The ignition switch is in the crank or the run position.

Conditions for Setting the DTC

The high resolution TP sensor signal is out of range.

Action Taken When the DTC Sets
    • The control module stores the DTC information into memory when the diagnostic runs and fails.
    • The malfunction indicator lamp (MIL) will not illuminate.
    • The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
    • The driver information center, if equipped, may display a message.

Conditions for Clearing the DTC
    • 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 non-emission related diagnostic.
    • Clear the DTC with a scan tool.

Diagnostic Aids

If the DTC is determined to be intermittent, reviewing the Failure Records can be useful in determining when the DTC was last set.

Test Description

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

  1. When the TAC module detects a condition within the electronic throttle control (ETC) system the powertrain control module (PCM) receives a message across serial data and more than 1 ETC system related DTC may set. This is due to the many redundant tests run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Keep this in mind when reviewing captured DTC info.

Step

Action

Yes

No

Schematic Reference: Engine Controls Schematics

1

Did you perform the Diagnostic System Check-Engine Controls?

Go to Step 2

Go to Diagnostic System Check - Engine Controls

2

Important: If any other DTCs are set, refer to those DTCs first.

Operate within Failure Records conditions.

Does the scan tool indicate DTC P1519 failed this ignition?

Go to Step 3

Go to Diagnostic Aids

3

Replace the TAC module. Refer to Accelerator Pedal Position Sensor Replacement .

Did you complete the replacement?

Go to Step 4

--

4
  1. Use the scan tool in order to clear the DTCs.
  2. Turn OFF the ignition for 30 seconds.
  3. Operate the vehicle within the Conditions For Running the DTC as specified in the supporting text.

Does the DTC run, and pass?

Go to Step 5

Go to Step 2

5

With a scan tool, observe the stored information, Capture Info.

Does the scan tool display any DTCs that you have not diagnosed?

Go to Diagnostic Trouble Code (DTC) List

System OK