Dodge ZB 2005 Service Manual page 1166

P0121-TP SENSOR VOLTAGE DOES NOT AGREE WITH MAP —
TEST
6 Connect the PCM harness connectors.
With the DRBIII , monitor the TP Sensor voltage.
Ignition on, engine not running.
Connect a jumper wire between the (K22) TP Sensor #1 Signal circuit and the (K900)
Sensor ground circuit.
Does the DRBIII display TP Sensor voltage from approximately 4.9 volts to below
0.5 of a volt?
Yes → Replace the Throttle Position Sensor.
→ Go To 7
No
NOTE: Remove the jumper wire before continuing.
7 Turn the ignition off.
Disconnect the PCM harness connectors.
Measure the resistance of the (K22) TP Sensor #1 Signal circuit from the TP Sensor
harness connector to the PCM harness connector.
Is the resistance below 5.0 ohms?
Yes → Go To 8
→ Repair the excessive resistance in the (K22) TP Sensor #1 Signal
No
8 Measure the resistance between ground and the (K22) TP Sensor #1 Signal circuit at
the TP Sensor harness connector.
Is the resistance below 5.0 ohms?
Yes → Go To 9
→ Repair the short to ground in the (K22) TP Sensor #1 Signal
No
9 Measure the resistance of the (K900) Sensor ground circuit from the TP Sensor
harness connector to the PCM harness connector.
Is the resistance below 5.0 ohms?
Yes → Go To 16
→ Repair the excessive resistance in the (K900) Sensor ground
No
10 Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Disconnect the PCM harness connectors.
Measure the resistance of the (K7) 5-volt Supply circuit from the MAP Sensor
harness connector to the PCM harness connector.
Is the resistance below 5.0 ohms?
Yes → Go To 11
→ Repair the excessive resistance in the (K7) 5-volt Supply circuit.
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
45
Continued
APPLICABILITY
All
All
All
All
All