Dodge ZB 2005 Service Manual page 1164

Symptom:
P0121-TP SENSOR VOLTAGE DOES NOT AGREE WITH MAP
When Monitored and Set Condition:
P0121-TP SENSOR VOLTAGE DOES NOT AGREE WITH MAP
When Monitored: With the engine running and no MAP Sensor or TP Sensor DTC's set.
Engine speed must be greater than 1600 RPM.
Set Condition: The PCM performs two separate tests. When the manifold vacuum is high,
the TP Sensor should be low. When the manifold vacuum is low, the TP Sensor signal
should be high. If the proper TP Sensor voltage is not detected when the two conditions are
met, a DTC will be set after 4 seconds.
GOOD TRIP EQUAL TO ZERO
RESISTANCE IN THE (K7) 5-VOLT SUPPLY CIRCUIT
(K7) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
MAP SENSOR
RESISTANCE IN THE (K1) MAP SENSOR SIGNAL CIRCUIT
RESISTANCE BETWEEN GROUND AND THE (K1) MAP SENSOR SIGNAL CIRCUIT
RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT
TP SENSOR OPERATION
RESISTANCE IN THE TP SENSOR (K7) 5-VOLT SUPPLY
TP SENSOR (K7) 5-VOLT SUPPLY SHORTED TO GROUND
THROTTLE POSITION SENSOR
RESISTANCE IN THE (K22) TP SENSOR #1 SIGNAL CIRCUIT
RESISTANCE BETWEEN GROUND AND THE (K22) TP SENSOR #1 SIGNAL CIRCUIT
RESISTANCE IN (K900) SENSOR GROUND CIRCUIT
PCM
POSSIBLE CAUSES
43
DRIVEABILITY - GAS