LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2007 >> Optra LS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.8L (LDA) >> Diagnostic Information and Procedures >> DTC P0106 >> Component Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Testing

TP Sensor

  1. Ignition OFF, disconnect the harness connector of the throttle body assembly.
  2. Measure for 1160-1175 ohms between the 5-volt reference and the low reference terminals of the TP sensor.
    • If the resistance is not within the specified range, replace the throttle body assembly.
  3. Measure the resistance between the signal terminal and the low reference terminal of the TP sensor. Sweep the TP sensor through the entire range. The resistance should vary between 1530-630 ohms without any spikes or dropouts.
    • If the resistance is not within the specified range or is erratic, replace the throttle body assembly.
  4. Apply 5 volts and ground to the applicable terminals of the TP sensor, and measure the voltage between the signal and the low reference terminals. Sweep the TP sensor through the entire range. The voltage should vary between 4.3-0.6 volts without any spikes or dropouts.
    • If the voltage is not within the specified range or is erratic, replace the throttle body assembly.

MAP Sensor

  1. Ignition OFF, perform one of the following applicable procedures.
    • Disconnect the vacuum supply hose from the MAP sensor
    • Remove the MAP sensor from the intake manifold
  2. Ignition ON, observe and record the scan tool MAP sensor pressure data parameter. This is the first MAP sensor reading.
  3. With the J 23738-A  , apply 17 kPa (5 in Hg) of vacuum to the MAP sensor. Observe and record the scan tool MAP sensor pressure data parameter. This is the second MAP sensor reading.
  4. Subtract the second MAP sensor reading from the first MAP sensor reading. Verify that the vacuum decrease is within 4 kPa (1 in Hg) of the applied vacuum.
    • If the vacuum decrease is not within the specified range, replace the MAP sensor.
  5. With the J 23738-A  , apply 34 kPa (10 in Hg) of vacuum to the MAP sensor. Observe and record the scan tool MAP sensor pressure data parameter. This is the third MAP sensor reading.
  6. Subtract the third MAP sensor reading from the first MAP sensor reading. Verify that the vacuum decrease is within 4 kPa (1 in Hg) of the applied vacuum.
    • If the vacuum is not with in the specified range, replace the MAP sensor.
scientia non olet · About LEMON Manuals