Pinpoint Test E: TSS, Intermediate Shaft Speed and OSS Sensors
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 illustration within the Transmission Connector Layouts Transmission Connector Layouts procedure.
NOTE: Read and record all DTCs.
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E1 ELECTRONIC DIAGNOSTICS
- Select PARK.
- Ignition OFF.
- Check to make sure the transmission harness C168, C143, C164 and C193 are fully seated, the terminals are fully engaged in the connectors and are 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 transmission 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 sensor PID increase and decrease with engine and vehicle speed?
Yes
GO to E3.
No
If the TSS, intermediate shaft speed sensor or OSS speed PID does not increase and decrease with engine and vehicle speed, GO to E4.
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E3 DRIVE CYCLE TEST ERRATIC
- While monitoring the appropriate sensor PID, drive the vehicle so that the transmission upshifts and downshifts through all gears.
- Is the TSS, intermediate shaft speed or OSS sensor PID signal erratic (drop to zero or near zero and return to normal operation)?
Yes
If the sensor signal is erratic, INSPECT for intermittent concern in the harness, sensor or connector. GO to E4.
No
CLEAR the DTCs. TEST the system for normal operation.
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E4 CHECK TRANSMISSION VEHICLE HARNESS FOR OPENS
- Ignition OFF.
- Disconnect: PCM C175T.
- Inspect for damaged or pushed-out terminals, corrosion or loose wires.
- Lower the rear of the transmission to gain access to the sensors.
- Disconnect: TSS Sensor C143.
- Disconnect: Intermediate Shaft Speed Sensor C164.
- Disconnect: OSS Sensor C193.
- For OSS, measure the resistance between PCM C175T-41, circuit RE406 (GY/VT), harness side and the OSS sensor C193-2, circuit RE406 (GY/VT), harness side.
- For intermediate shaft speed, measure the resistance between PCM C175T-41, circuit RE406 (GY/VT), harness side and the intermediate shaft speed sensor C164-2, circuit RE406 (GY/VT), harness side.
- For TSS, measure the resistance between PCM C175T-41, circuit RE406 (GY/VT), harness side and the TSS sensor C143-2, circuit RE406 (GY/VT), harness side.
- For intermediate shaft speed, measure the resistance between PCM C175T-4, circuit VE739 (GY/YE), harness side and the intermediate shaft speed sensor C164-1, circuit VE739 (GY/YE), harness side.
- For TSS, measure the resistance between PCM C175T-15, circuit VET33 (WH/OG), harness side and the TSS sensor C143-1, circuit VET33 (WH/OG), harness side.
- For OSS, measure the resistance between PCM C175T-3, circuit RET04 (YE/GN), harness side and the OSS sensor C193-1, circuit RET04 (YE/GN), harness side.
- Are the resistances less than 5 ohms?
Yes
GO to E5.
No
REPAIR circuits having more than 5 ohms. CLEAR the DTCs. TEST the system for normal operation.
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E5 CHECK THE TRANSMISSION VEHICLE HARNESS FOR SHORT TO GROUND
- For the OSS, measure the resistance between OSS sensor C193-1, harness side and ground and C193-2, harness side and ground.
- For the intermediate shaft speed sensor, measure the resistance between intermediate shaft speed sensor C164-1, harness side and ground and C164-2, harness side and ground.
- For the TSS, measure the resistance between TSS C143-1, harness side and ground and C143-2, harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to E6.
No
REPAIR circuit(s) having more than 10,000 ohms. CLEAR the DTCs. TEST the system for normal operation.
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E6 CHECK THE RESISTANCE OF THE TSS, INTERMEDIATE SHAFT SPEED SENSOR OR OSS SENSOR
- Disconnect the appropriate connector from the TSS C143, intermediate shaft speed sensor C164 or OSS sensor C193.
- Measure the resistance between terminal 1 and terminal 2 of the speed sensor using the following chart.
- Record the value.
- Is the resistance within specification?
Yes
GO to E7.
No
INSTALL a new sensor. CLEAR the DTC. TEST the system for normal operation.
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E7 CHECK SENSORS FOR A SHORT TO GROUND
- Measure the resistance between TSS C143-1 , OSS C193-1 or intermediate shaft speed sensor C164-1 component side of each sensor and ground.
- Is the resistance greater than 10,000 ohms?
Yes
REFER to Diagnosis By Symptom Diagnosis By Symptom for diagnosis of shift or torque converter concerns.
No
INSTALL a new sensor.
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