Pinpoint Test F: TSS Sensor

Pinpoint Tests - OSC Equipped Vehicle

Pinpoint Tests

PINPOINT TEST F: TSS SENSOR

NOTE: Refer to the transaxle connector illustrations and solenoid body leadframe internal wiring diagram Transaxle Connector Layouts Transaxle Connector Layouts.

NOTE: Turbine Shaft Speed (TSS) codes may be a result of bad power and ground circuits shared between the Transmission Range (TR) sensor, Output Shaft Speed (OSS) sensor and TSS sensor.

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F1 ELECTRONIC DIAGNOSTICS


- Check to make sure the transaxle vehicle harness C1520a is fully seated, terminals are engaged in connector and in good condition before proceeding.
- Have the items above been checked?

Yes
GO to F2.

No
CARRY OUT the checks. ERASE the codes. RERUN the On-Board Diagnostic (OBD) tests.

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F2 ELECTRONIC DIAGNOSTICS


- Connect the scan tool.
- Monitor the TSS sensor PIDs while test driving the vehicle.
- Are the TSS sensor signal present and consistent?

Yes
The condition that set the DTC is intermittent and is not currently present. ERASE the codes. RERUN the OBD tests.

No
GO to F3.

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F3 CHECK THE TRANSAXLE VEHICLE HARNESS FOR AN OPEN CIRCUIT


- Disconnect: TSS Sensor C1520b .
- Disconnect: PCM Transaxle Harness 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 between the TSS C1520b and the PCM transaxle C175T.





- Is the resistance less than 5 ohms?

Yes
GO to F4.

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

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F4 CHECK THE TRANSAXLE VEHICLE HARNESS FOR A SHORT TO GROUND


- Disconnect: Transaxle Vehicle Harness Connector C1520a .
- Measure the resistance between TSS C1520b and ground.





- Is the resistance greater than 10,000 ohms?

Yes
GO to F5.

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

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F5 CHECK THE TRANSAXLE VEHICLE HARNESS FOR A SHORT TO POWER


- Check for voltage between the TSS sensor C1520b and ground.





- 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 F6.

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F6 CHECK FOR VOLTAGE AND GROUND AT THE TSS SENSOR CONNECTOR


- Connect: PCM C175T .
- Ignition ON.
- Measure the voltage between TSS sensor C1520b-1 and C1520b-3.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new speed sensor. REFER to Turbine Shaft Speed (TSS). TEST the system for normal operation. If the condition is still present, INSTALL a new PCM. REFER to Computers and Control Systems.

No
INSTALL a new PCM. REFER to Computers and Control Systems. CONNECT all components. TEST the system for normal operation.

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