Pinpoint Test C: TSS And OSS Sensors

6F50

Pinpoint Tests


PINPOINT TEST C: TSS AND OSS SENSORS

NOTE: Refer to the Transaxle Vehicle Harness Connector illustration Transaxle Connector Layouts Symptom Related Diagnostic Procedures.

NOTE: Refer to the Transaxle Internal Harness Diagram illustration Transaxle Connector Layouts Symptom Related Diagnostic Procedures.

-------------------------------------------------
C1 ELECTRONIC DIAGNOSTICS


- Check to make sure transaxle vehicle harness C168 is fully seated, terminals are engaged in connector and in good condition before proceeding.
- Have the items above been checked?

Yes
GO to C2 .

No
CARRY OUT the checks. CLEAR the DTCs. RERUN the On-Board Diagnostic (OBD) Tests.

-------------------------------------------------
C2 ELECTRONIC DIAGNOSTICS


- Connect the scan tool.
- Monitor the speed sensor PIDs while test driving the vehicle.
- Are the Turbine Shaft Speed (TSS) and Output Shaft Speed (OSS) sensor signals present and consistent?

Yes
The condition that set the DTC is intermittent and is not currently present. CLEAR the DTCs. RERUN the OBD Tests.

No
GO to C3.

-------------------------------------------------
C3 CHECK THE TRANSAXLE VEHICLE HARNESS FOR AN OPEN CIRCUIT


- Disconnect: Transaxle Vehicle Harness C168.
- Disconnect: PCM Transaxle C175T.
- Use a mirror to inspect both ends of the connectors for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
- Measure the resistance for the speed sensor circuits between the transaxle vehicle harness C168 and the PCM transaxle C175T.





- Is the resistance less than 5 ohms?

Yes
GO to C4.

No
REPAIR the circuit(s) for an open. CONNECT all components. TEST the system for normal operation.

-------------------------------------------------
C4 CHECK THE TRANSAXLE VEHICLE HARNESS FOR A SHORT TO GROUND


- Measure the resistance for the speed sensor circuits between transaxle vehicle harness C168 and ground.





- Is the resistance greater than 10,000 ohms?

Yes
GO to C5.

No
REPAIR the circuit(s) for a short to ground. CONNECT all components. TEST the system for normal operation.

-------------------------------------------------
C5 CHECK THE TRANSAXLE VEHICLE HARNESS FOR A SHORT TO VPWR


- Check for voltage from the speed sensor circuits at transaxle vehicle harness C168.





- Is any voltage present?

Yes
REPAIR the circuit(s) for a short to voltage. CONNECT all components. TEST the system for normal operation.

No
GO to C6.

-------------------------------------------------
C6 CHECK THE SOLENOID BODY FOR AN INTERNAL OPEN CIRCUIT


- Remove the main control cover. Refer to Main Control Cover Service and Repair.
- Disconnect: TSS Sensor.
- Disconnect: OSS Sensor.
- Use a mirror to inspect both ends of the connectors for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
- NOTE: The OSS sensor is above the main solenoid body connector next to the Transmission Range (TR) sensor, the TSS sensor connector is below the main solenoid body connector.
- Measure the resistance of the solenoid body internal speed sensor power circuit between the main solenoid body connector pin 20, solenoid body side and the TSS or OSS sensor connectors pin 2, solenoid body side.




- NOTE: The OSS sensor is above the main solenoid body connector next to the TR sensor.
- Measure the resistance of the solenoid body internal speed sensor ground circuit between the main solenoid body connector pin 9, solenoid body side and OSS sensor connector pin 3, solenoid body side.




- NOTE: The TSS sensor connector is below the main solenoid body connector.
- Measure the resistance of the solenoid body internal speed sensor ground circuit between the main solenoid body connector pin 9, solenoid body side and TSS sensor connector pin 1, solenoid body side.




- NOTE: The TSS sensor connector is below the main solenoid body connector.
- Measure the resistance of the solenoid body internal circuit for the TSS sensor signal between the main solenoid body connector pin 19, solenoid body side and TSS sensor connector pin 3, solenoid body side.




- NOTE: The OSS sensor is above the main solenoid body connector next to the TR sensor.
- Measure the resistance of the solenoid body internal circuit for the OSS sensor signal between the main solenoid body connector pin 10, solenoid body side and OSS sensor connector pin 1, solenoid body side.




- Is the resistance less than 5 ohms?

Yes
GO to C7.

No
INSTALL a new solenoid body. REFER to Solenoid Body Assembly Solenoid Body Assembly. CONNECT all components. TEST the system for normal operation.

-------------------------------------------------
C7 CHECK FOR VOLTAGE AT THE SPEED SENSOR CONNECTORS


- Connect: PCM Transaxle C175T.
- Connect: Transaxle Vehicle Harness Connector C168.
- Ignition ON.
- Measure the voltage at TSS sensor connector pin 2, solenoid body side or OSS sensor connector pin 2, solenoid body side.




- Is the voltage greater than 10 volts?

Yes
GO to C8.

No
INSTALL a new PCM. CONNECT all components. TEST the system for normal operation.

-------------------------------------------------
C8 CHECK FOR REFERENCE SIGNAL VOLTAGE AT THE SPEED SENSOR CONNECTORS


- NOTE: The TSS sensor connector is below the main solenoid body connector.
- Measure the voltage at TSS sensor connector pin 3, solenoid body side.




- NOTE: The OSS sensor is above the main solenoid body connector next to the TR sensor.
- Measure the voltage at OSS sensor connector pin 1, solenoid body side.




- Is the voltage between 4.5 and 5.5 volts?

Yes
GO to C9.

No
INSTALL a new PCM. CONNECT all components. TEST the system for normal operation.

-------------------------------------------------
C9 CHECK FOR GROUND AT THE SPEED SENSOR CONNECTORS


- NOTE: The TSS sensor connector is below the main solenoid body connector.
- Measure the resistance between TSS sensor connector pin 1, solenoid body side and ground.




- NOTE: The OSS sensor is above the main solenoid body connector next to the TR sensor.
- Measure the resistance between OSS sensor connector pin 3, solenoid body side and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new speed sensor. REFER to Turbine Shaft Speed (TSS) Sensor Turbine Shaft Speed (TSS) Sensor or Output Shaft Speed (OSS) Sensor Output Shaft Speed (OSS) Sensor. TEST the system for normal operation. If the condition is still present, INSTALL a new PCM.

No
INSTALL a new PCM. CONNECT all components. TEST the system for normal operation.

-------------------------------------------------