E032

Diagnostic Chart.:

Sensor Wiring Diagram:

DESCRIPTION:

The Manifold Absolute Pressure (MAP) sensor, is a sensor that changes resistance based upon manifold vacuum. The PCM/ECM provides a 5 volt reference and ground. The MAP signal varies between ground and 5 volts as manifold vacuum varies. Code E032 is designed to set when the PCM/ECM detects a MAP sensor signal that is too low.

TEST CONDITION #1:

1. Engine speed 700 rpm or less.
2. TPS 18° or less.
3. Throttle switch closed.

TEST CONDITION #2:

1. Engine speed 1800 rpm or less.
2. TPS 13° or greater.
3. Throttle switch open.
4. Not in Park or Neutral.

FAILURE CONDITIONS:

MAP value less than 15 kPa for .2 seconds.

ACTION TAKEN:

1. PCM/ECM illuminates "SERVICE ENGINE SOON" telltale.
2. PCM/ECM sets the BARO value to 92 kPa.
3. PCM/ECM uses a substitute MAP value based on engine speed and throttle switch status (open or closed).

NOTES ON FAULT TREE:

1. Checking for circuitry from sensor to PCM/ECM able to respond to a 5 volt signal on MAP input. A reading of 106 to 109 means wiring and PCM/ECM are OK.

2. Checking for 5 volt reference present at sensor connector.

3. Checking for CKT 432 shorted to ground.

4. Checking for PCM/ECM able to respond to a 5 volt signal voltage on MAP input.

5. Fault is most likely at PCM/ECM connector or PCM/ECM. Before replacing PCM/ECM, perform the "PCM/ECM Replacement Check", CHART C-1.

NOTE ON INTERMITTENTS:

Manipulate MAP sensor connector, MAP wiring, and PCM/ECM connector while observing PCM/ECM parameter ED02. Apply and release vacuum to the MAP sensor vacuum port using a vacuum source. If the PCM/ECM parameter ED02 displays less than 15 kPa, the condition has been induced and the cause of the intermittent should be repaired. If wiring and connectors check out OK, substitute a known good MAP sensor and retest.