P032

DTC PO32:

IAT, MAP And TPS Circuits:

CIRCUIT DESCRIPTION
The Manifold Absolute Pressure (MAP) sensor is a sensor that changes resistance based upon manifold vacuum. The Powertrain Control Module (PCM) provides a 5 volt reference and ground. The MAP sensor signal varies between ground and 5 volts as manifold vacuum varies. As MAP decreases, voltage decreases (low engine load, high vacuum). As MAP increases, voltage increases (high engine load, low vacuum). The PCM uses the MAP sensor values as an indicator of engine load. Code P032 sets when the PCM detects a MAP sensor signal that is too low.

TEST CONDITIONS
Condition 1:
1. RPM 700 or less.
2. Throttle Position (TP) sensor 18 degrees or less.

OR

Condition 2:
1. RPM 1800 or less.
2. TP sensor 13 degrees or less.
3. Not in PARK or NEUTRAL.

FAILURE CONDITION
MAP 16 kPa or less for 0.15 second.

ACTION TAKEN
1. PCM turns "ON" the Malfunction Indicator Lamp (MIL) (Service Engine Soon).
2. PCM disables long term fuel trim.
3. PCM uses a substitute MAP value based on engine rpm and throttle position switch status.
4. PCM disables evaporative emission control solenoid.
5. PCM disables torque management.
6. Transaxle shift adapts are maintained at current values.

NOTES ON FAULT TREE
1. If MAP sensor or circuitry are open, PCM data parameter PD02 will read 10-16 kPa.
2. Checking if circuitry from sensor to PCM is able to respond to a 5 volt signal on MAP input. A reading of 102-105 means wiring and PCM are OK.
3. Checking for a short to ground on CKT 432 or an open in CKT 432, CKT 474 or in the MAP sensor.
4. Checking for CKT 432 shorted to ground.
5. Checking if 5 volt signal is reaching the PCM. If signal is present, replace PCM.