Chrysler 300M 2002 Service Manual page 2852

P0720-OUTPUT SPEED SENSOR ERROR —
TEST
2 Start the engine in park.
Raise the drive wheels off of the ground.
WARNING: PROPERLY SUPPORT THE VEHICLE.
Place transmission in drive, release foot from brake.
WARNING: BE SURE TO KEEP HANDS AND FEET CLEAR OF ROTATING
WHEELS.
Note: The drive wheels must be turning at this point.
With the DRBIII , read the Output RPM
Is the Output RPM below 100?
Yes → Go To 3
→ Go To 11
No
3 Turn the ignition off to the lock position.
CAUTION: Remove the Starter Relay from the PDC. This will prevent the
vehicle from being started in gear.
NOTE: Failure to remove the Starter Relay can cause a TCM - No Response
condition.
Install Transmission Simulator, Miller tool #8333 and the FWD adapter cable kit,
Miller tool #8333-1.
Ignition on, engine not running.
Using the Transmission Simulator, set the rotary knob to the 3000/1250 position.
Turn the Input/Output switch ON.
With the DRBIII , read the Input RPM and Output RPM.
Does the Input RPM read 3000 and the Output RPM read 1250 (within 50 RPM)?
Yes → Go To 4
→ Go To 5
No
NOTE: After completion of this procedure, make sure to disconnect Trans-
mission Simulator, Miller tool #8333 and FWD adaptor cable kit, Miller tool
#8333-1 and reconnect all connectors.
4 If there are no possible causes remaining, view repair.
Repair
5 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 Output Speed Sensor Signal circuit from the Pinout
Box to the Output Speed Sensor harness connector.
Is the resistance above 5.0 ohms?
Yes → Repair the Output Speed Sensor Signal circuit for an open.
→ Go To 6
No
ACTION
Replace the Output Speed Sensor per the Service Information.
Perform 42LE TRANSMISSION VERIFICATION TEST - VER 1.
Perform 42LE TRANSMISSION VERIFICATION TEST - VER 1.
Continued
53
TRANSMISSION
APPLICABILITY
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All
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