Chrysler 300M 2002 Service Manual page 2853

TRANSMISSION
P0720-OUTPUT SPEED SENSOR ERROR —
TEST
6 Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the Output Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
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 Speed Sensor Ground circuit from the Pinout Box to
the Output Speed Sensor harness connector.
Is the resistance above 5.0 ohms?
Yes → Repair the Speed Sensor Ground circuit for an open.
→ Go To 7
No
7 Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the Output Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
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 between ground and the Output Speed Sensor Signal circuit.
Is the resistance Below 5.0 ohms?
Yes → Repair the Output Speed Sensor Signal circuit for a short to
→ Go To 8
No
8 Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the Output Speed Sensor harness connector.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the Fused B+ circuit and Transmission Control Relay
Output circuit in the Transmission Control Relay connector.
Ignition on, engine not running.
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 voltage of the Output Speed Sensor Signal circuit in the Pinout Box.
Is the voltage above 0.5 volt?
Yes → Repair the Output Speed Sensor Signal circuit for a short to
→ Go To 9
No
ACTION
Perform 42LE TRANSMISSION VERIFICATION TEST - VER 1.
ground.
Perform 42LE TRANSMISSION VERIFICATION TEST - VER 1.
voltage.
Perform 42LE TRANSMISSION VERIFICATION TEST - VER 1.
Continued
54
APPLICABILITY
All
All
All