B132

Code B132:

Oil Pressure Sensor Circuit:

CIRCUIT DESCRIPTION:

The oil pressure indicator uses a variable resistor used to indicate oil pressure to the BCM. The BCM supplies a voltage on CKT 313 to the sensor. When the engine is not running (low oil pressure) the sensor's resistance is "LO." When the engine is running (increased oil pressure) the sensor's resistance becomes high. This signal voltage will vary between 5.0 volts (open circuit) and 0 volts (circuit shorted to ground).

Code B132 will set if the engine is running and the signal voltage indicates greater than 80.0 psi for at least 2.0 seconds. As actual engine oil pressure will never be that high, the code indicates an open circuit (or faulty sensor or BCM).

TEST DESCRIPTION: Numbers below refer to circled numbers on the diagnostic chart.

1. Checks to see if the open circuit reading is due to the circuit or sensor. If the open circuit reading changes to a shorted circuit reading after jumpering the sensor terminals, the BCM and wiring are OK.

2. By applying a ground to various points in the circuits, an open can be isolated by observing whether the parameter display can be changed from the open reading to the shorted reading.

NOTE ON INTERMITTENTS:

If an intermittent code B132 is being set, manipulate the related wiring while observing BCM data parameter BD71. If the failure is induced the reading will jump from 0 to some oil pressure with the engine "OFF."