Chrysler PT Cruiser 2001 Service Manual Supplement page 2792

TRANSMISSION
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 , observe the Output RPM
Is the Output RPM below 100?
Yes → Go To 3
No
3 Turn ignition off to the lock position.
CAUTION: Remove the Starter Relay from the PDC. This will prevent the
vehicle from being started in gear.
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 middle (1000/3000)
position. Turn the Input/Output switch on.
With the DRBIII , observe 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
No
4 Replace the Output Speed Sensor in accordance with the Service Information.
View repair options.
Repair
5 Turn ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the TRS harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Output Speed Sensor Signal circuit from the TCM
connector to the Output Speed Sensor connector.
Is the resistance above 5.0 ohms?
Yes → Repair open Output Speed Sensor Signal circuit
No
6 Turn ignition off to the lock position.
Disconnect the TCM harness connector.
Disconnect the TRS harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Speed Sensor Ground circuit from the TCM connector
to the Output Speed Sensor connector.
Is the resistance above 5.0 ohms?
Yes → Repair open Speed Sensor Ground circuit
No
ACTION
→ Go To 11
→ Go To 5
Replace the Output Speed Sensor.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
→ Go To 6
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
→ Go To 7
Continued
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APPLICABILITY
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