Pinpoint Test E: TSS, Intermediate Shaft Speed and OSS Sensors

5R44E and 5R55E

Pinpoint Tests - OSC Equipped Vehicle

Pinpoint Tests

PINPOINT TEST E: TSS, INTERMEDIATE SHAFT SPEED AND OSS SENSORS

NOTE: Refer to the Turbine Shaft Speed (TSS), intermediate shaft speed and Output Shaft Speed (OSS) sensor connector illustrations within the Transmission Connector Layouts Transmission Connector Layouts procedure.

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E1 ELECTRONIC DIAGNOSTICS


- Select PARK.
- Ignition OFF.
- Check to make sure the transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
- Connect the scan tool.
- Ignition ON.
- Access the transmission PIDs.
- Is the scan tool able to access the transmission PIDs?

Yes
GO to E2.

No
REPEAT procedure to access the transmission PIDs. If the scan tool did not access the transmissions PIDs, REFER to Computers and Control Systems Information for diagnosis of PCM.

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E2 DRIVE CYCLE TEST


- While monitoring the appropriate sensor PID, drive the vehicle so that the transmission upshifts and downshifts through all gears.
- Does the TSS, intermediate shaft speed or OSS PID increase and decrease with engine and vehicle speed or is the sensor signal erratic (drop to zero or near zero and return to normal operation)?

Yes
If the TSS, intermediate shaft speed or OSS PIDs increase and decrease with engine and vehicle speed,
CLEAR the DTCs. ROAD TEST to verify if concern is still present. If concern is still present, REFER to the Diagnosis by Symptom Index in Diagnosis By Symptom Diagnosis By Symptom for diagnosis.

If the sensor signal is erratic, INSPECT for intermittent concern in the internal/external harness, sensor or connector.

No
If the TSS, intermediate shaft speed or OSS PID does not increase and decrease with engine and vehicle speed, INSPECT for open or short in vehicle harness, sensor, a PCM concern or internal hardware concern.

If the sensor signal is steady, GO to E3.

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E3 CHECK RESISTANCE OF TSS, INTERMEDIATE SHAFT SPEED OR OSS SENSOR


- Disconnect: OSS C193.
- Disconnect: Intermediate Shaft Speed C164.
- Disconnect: 5R44E Transmission Vehicle Harness C168.
- Disconnect: 5R55E Transmission Vehicle Harness C199.
- Measure the resistance between terminal 1 and 2 of the intermediate shaft speed and/or the Output Shaft Speed (OSS) sensor component side.




- For the Turbine Shaft Speed (TSS) sensor, measure the resistance between C168-2 and C168-3 5R44E transmission component side.




- For the TSS sensor, measure the resistance between C199-2 and C199-3 5R55E transmission component side.




- Record the resistance. Resistance should be as follows:





- Is the resistance within specification for the appropriate sensor?

Yes
REFER to the Diagnosis by Symptom Index in Diagnosis By Symptom Diagnosis By Symptom for concern diagnosis.

No
INSTALL a new sensor.

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