Volvo All Engines (2004 Emissions) Fault Code: PID 103 FMI 1 Turbo Speed Sensor

Fault Condition: If the EMS Module detects an open, short to ground or short to voltage in the Turbo Speed Sensor signal circuit, the Electronic Malfunction Lamp (EML) will turn ON and PID 103 will set. PID 103 will also set if the turbocharger wheel speed is not within the predetermined limits at a given engine speed. A fault is logged if the measured turbocharger speed is 25% or more lower than the target wheel speed for the measured boost. The speed must be low for approximately 5 seconds. The engine must be running for the diagnostic to take place (turbo speed is not measured when the engine is stopped – service tools will generally freeze on the last known value).

Possible repairs:

Turn the ignition key OFF first.

1) Disconnect the Turbo Speed Sensor connector. Measure the resistance across terminals 1 and 2 of the Turbo Speed Sensor. If the resistance is NOT between 600–1000 ohms at 77°F (25°C), inspect the Turbo Speed Sensor connector for damage. If no damage is evident, replace the Turbo Speed Sensor.
2) Disconnect the Turbo Speed Sensor connector. Check for continuity between pins 1 and 2 of the Turbo Speed Sensor and a good ground. If continuity exists, replace the Turbo Speed Sensor.
3) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Install a jumper between pins 1 and 2 of the Turbo Speed Sensor harness connector. Check for continuity between EMS Module connector A pins 41 and 42. If there is NO continuity, there is an open in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the open circuit.
4) Remove the jumper from the Turbo Speed Sensor harness connector. Disconnect EMS Module connector A. Check for continuity between EMS Module connector A pin 41 and a good ground. Check for continuity between EMS Module connector A pin 42 and a good ground. If continuity exists between either pin and ground, there is short to ground in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate
and repair the short to ground.
5) Disconnect the Turbo Speed Sensor connector. Disconnect EMS Module connector A. Turn the ignition key ON. Measure the voltage between EMS Module connector A pins 41 and 42 and a good ground. If the measured voltage is greater than 0.5 volts, there is short to voltage in one of the circuits between the Turbo Speed Sensor and the EMS Module connector A. Locate and repair the short to voltage.
6) Disconnect EMS Module connectors A and B. Disconnect the Turbo Speed Sensor connector. Check for continuity between EMS Module connector A pins 41 and 42 and all other pins on EMS Module connectors A and B.
If continuity exists, there is short to one of the other EMS Module circuits. Locate and repair the short circuit.
7) Connect the Turbo Speed Sensor harness connector. Connect connectors A and B to the EMS Module. Turn the ignition key ON. If PID 103 is active, replace the Turbo Speed Sensor and retest the system. If PID 103 is still active, replace the EMS Module and retest the system. If PID 103 is not active, the diagnostic procedures have corrected the problem. Check all connectors to ensure proper connections.