GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Tracker - 2WD 🢒 Engine 🢒 Engine Controls - 2.5L (LE8) 🢒 DTC P2282

Description

The DTC P2282 Intake Manifold Air Leak diagnostic monitors the volume of air consumed at idle speed speed. The powertrain control module (PCM) controls the throttle actuator control (TAC) motor in order to regulate the air flow through the throttle body. The amount of air flowing through the throttle body will normaly determine the engine speed. If there is an intake air leak or a malfunction in the positive crankcase ventilation (PCV) system excess air can enter the intake manifold affecting engine speed. The PCM uses sensor input in order to determine an estimated volume of air that is used during normal idle conditions. If there is any excess air, the estimated volume of air will be more than the expected value and DTC P2282 will set.

Conditions for Running the DTC

Intake air temperature (IAT) is at least -10°C (14°F) or higher.

Conditions for Setting the DTC

The pressure difference between measured manifold absolute pressure (MAP) and calculated MAP, based on engine load (Mass Air Fow (MAF,engine speed) is more than specification.

Action Taken When the DTC Sets
    • The PCM illuminates the malfunction indicator lamp (MIL) after 2 consecutive ignition cycles in which the diagnostic runs with the fault active.
    • The PCM records the operating conditions at the time the diagnostic fails. This information is stored in the Freeze Frame buffer.

Conditions for Clearing the MIL/DTC
    • The MIL turns OFF after 3 consecutively passing trips without a fault present.
    • A history DTC clears after 40 consecutive warm-up cycles without a fault.
    • Perform the scan tool Clear DTC Information function.

Test Description

The numbers below refer to the step numbers in the diagnostic table.

  1. The Diagnostic System Check-Engine Controls prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.

    2.

  2. This step prompts the technician to check for any condition that can allow air to enter the engine. Any condition that can affect the idle speed of the engine must be repaired first, in order to enable proper diagnosis of the DTC P2282.

    3.

  3. A dirty throttle valve can affect the air flow thru the throttle body and into the engine. Clean the throttle valve is necessary before performing the Idle Learn Procedure.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check-Engine Controls?

Go to Step 2

Go to Diagnostic System Check - Engine Controls

2

  1. Inspect the engine for any of the following conditions:
    2. • A stuck or damaged throttle valve or throttle body
    • A vacuum or intake air leak
    • An evaporative emission (EVAP) system malfunction
    • Faulty PCV system operation
    • Refer to Crankcase Ventilation System Inspection/Diagnosis in Engine Mechanical--2.5L.
  2. Repair the condition as necessary.

Did you find and correct a condition?

Go to Step 4

Go to Step 3

3
  1. Inspect the camshaft timing. Refer to Primary Timing Chain Installation .
  2. Repair the condition as necessary.

Did you find and correct a condition?

Go to Step 4

Go to Intermittent Conditions

4

Inspect the throttle valve for excessive deposits. Clean as necessary. Refer to Throttle Body Assembly Replacement .

Did you complete the action?

Go to Step 5

--

5
  1. Use the scan tool in order to clear the DTCs.
  2. Turn the ignition OFF for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC or until the DTC P2282 diagnostic has passed.

Does the DTC run and pass?

Go to Step 6

Go to Step 2

6

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

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

Go to

System OK