Chrysler Concorde 2004 Service Manual page 1229

P0720-OUTPUT SPEED SENSOR ERROR —
TEST
9 Turn the ignition off to the lock position.
Disconnect the PCM harness connector.
Disconnect the TRS harness connector.
Remove the Transmission Control Relay.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the Fused B+ and Transmission Control Relay
Output circuits 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 Speed Sensor Ground circuit.
Is the voltage above 0.5 volts?
Yes → Repair the Speed Sensor Ground circuit for a short to voltage.
→ Go To 10
No
10 Using the schematics as a guide, inspect the wiring and connectors. Repair as
necessary. Pay particular attention to all power and ground circuits.
If there are no possible causes remaining, view repair.
Repair
11 The conditions necessary to set the DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring and connectors while checking for shorted and open circuits.
With the DRBIII , check the EATX EVENT DATA to help identify the conditions in
which the DTC was set.
Were there any problems found?
Yes → Repair as necessary.
→ Test Complete.
No
ACTION
Perform 42LE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
Replace the Powertrain Control Module per the Service Informa-
tion. WITH THE DRBIII
REPROGRAM PINION FACTOR.
Perform 42LE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
Perform 42LE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
TRANSMISSION - NGC
Continued
PERFORM QUICK LEARN AND
69
APPLICABILITY
All
All
All