PCM compares the MAPS output and calculated MAPS value while enable condition is met. If the acutal MAP value is higher than Maximum threshold or lower than Minimum threshold for a pre-determined time, PCM determines that a fault exists and a DTC is stored.
If sensor signal input is higher than 4.85V during 0.1sec, PCM sets DTC P0108.
Item
Detecting Condition
Possible Cause
DTC Strategy
Voltage range check
Poor connection
Short to power in signal circuit
Open in ground circuit
MAPS
PCM
Enable Conditions
Short to battery
Threshold Value
Sensor voltage > 4.85 V
Diagnostic Time
2 sec.
Mil On Condition
2 Drive Cycle
As often as possible, the MAPS signal should be compared with the TPS signal. Check whether the MAPS and TPS signals increase at the same time when accelerating. During acceleration, the MAPS output voltage increases; during deceleration, the MAPS output voltage decreases.