Chrysler 300M 2002 Service Manual page 2511

DRIVEABILITY - NGC
P0123-THROTTLE POSITION SENSOR #1 HIGH —
TEST
3 Turn the ignition off.
Disconnect the TPS harness connector.
Ignition on, engine not running.
Measure the voltage of the TPS Signal circuit in the TPS harness connector.
Is the voltage above 5.2 volts?
Yes → Repair the short to battery voltage in the TP Sensor Signal
→ Go To 4
No
4 Turn the ignition off.
Disconnect the TPS harness connector.
Connect a jumper wire between the TPS Signal circuit and the Sensor ground circuit.
With the DRBIII , monitor the TPS voltage.
Ignition on, engine not running.
Is the voltage below 0.5 of a volt?
Yes → Replace the Throttle Position Sensor.
→ Go To 5
No
5 Turn the ignition off.
Disconnect the TPS harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the Sensor ground circuit from the TPS harness connector
to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes → Go To 6
→ Repair the open in the Sensor ground circuit.
No
6 Turn the ignition off.
Disconnect the TPS harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the TPS Signal circuit from the TPS harness connector to
the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes → Go To 7
→ Repair the open in the TPS Signal circuit.
No
ACTION
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
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APPLICABILITY
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