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Component Testing

TP Sensor

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