Volvo Engines Fault Code (2004 Emissions): PID 100 FMI 1 Engine Oil Pressure Sensor.
Diagnosing Volvo Oil Pressure Sensor Troubleshooting
Fault symptoms:
The Electronic Malfunction Indicator Lamp (EML) illuminates when the oil pressure sensor signal line voltage is less than 0.3 volts or greater than 4.75 volts. If the signal line voltage returns to between 0.3 volts and 4.75 volts, the fault becomes inactive.
Possible repairs:
Start by turning off the ignition key.
1) Disconnect the EMS A and B module connectors. Disconnect the oil pressure sensor connector. Check for continuity between pin 2 of the oil pressure sensor harness connector (signal line) and a good ground. Also check continuity between EMS module connector B pin 11 and all other pins of EMS module connectors A and B. If there is continuity, locate and repair the short.
2) Disconnect connector B from the EMS module. Check continuity between oil pressure sensor harness connector pin 1 (reference voltage line) and EMS module connector B pin 17. If there is no continuity, repair the harness reference voltage line open.
3) Disconnect the oil pressure sensor. Disconnect the connectors from the EMS module. Check continuity between EMS module connector B pin 11 (signal line) and all other pins of EMS module connectors A and B. If there is continuity or visual short circuit, repair the signal line short circuit. If there is no continuity or visual short, replace the EMS module.
4) Disconnect the oil pressure sensor. Disconnect connector B from the EMS module. Check continuity between pin 2 of the oil pressure sensor harness connector (signal line) and pin 11 of connector B of the EMS module.
If there is no continuity, repair the harness signal line open.
5) Disconnect the oil pressure sensor. Disconnect connectors A and B from the EMS module. Check continuity between pin 17 of the oil pressure sensor harness connector (reference voltage line) and all other pins of connectors A and B of the EMS module. If there is continuity or a visual short, repair the reference voltage line short. If there is no continuity or visual short, replace the EMS module.
6) Disconnect connectors A and B from the EMS module. Disconnect the oil pressure sensor. Check continuity between EMS module harness connector pin 17 (reference voltage line) and all other pins of EMS module connectors A and B. Visually check for a short circuit on pin 17 of connector B of the EMS module. If there is continuity or a visual short, repair the reference voltage line short. If there is no continuity or visual short, replace the EMS module.
7) Disconnect connectors A and B from the EMS module. Disconnect the oil pressure sensor. Check continuity between EMS module harness connector pin 18 (ground line) and all other pins of EMS module connectors A and B (see Figure 59). If there is continuity or a visual short, repair the return line short. If there is no continuity or visual short, replace the EMS module.
8) Visually inspect both sides of EMS module connector B pin 11 for a serviceable interruption in the signal line. If a serviceable interruption is detected, repair or replace the EMS module harness connector.
9) Visually inspect both sides of the oil pressure sensor connector for a serviceable interruption. If there is a repairable defect or one of the pins is loose, repair or replace the connector.
10) Remove the oil pressure sensor from the oil filter assembly. Connect the oil pressure sensor to a regulated air source with an accurate pressure gauge. Connect a jumper wire between pin 1 of the oil pressure sensor and pin 1 of the sensor harness connector. Connect a jumper wire between pin 4 of the oil pressure sensor and a good ground. Turn on the ignition key. Measure the voltage between pin 2 of the oil pressure sensor and a good ground at various pressures between 0 psi and 101.5 psi. If the oil pressure sensor output is correct over the entire pressure range, reinstall the sensor and replace the EMS module. If the oil pressure sensor output is NOT correct over the entire pressure range, replace the oil pressure sensor and recheck the system.
To learn more about repairing Volvo problems, please visit Volvo Trouble Repair or visit our site https://www.obd-diag.com.
After my high school studies, I decided to specialize in the automotive field. So I went to study automotive engineering in Grenoble where I obtained a master's degree in mechanical engineering for passenger vehicles.
Passionate about OBD (On-Board Diagnostic) technology, which allows drivers to diagnose their car themselves using the elaborate system embedded in their vehicles connected via Bluetooth/Wi-Fi or USB with a compatible personal computer such as Windows PC/ Linux/MacOsX such as ELM327 WiFi), I started my professional career as a technical writer after having completed several practical internships with different Lyon automobile garages in order to deepen my technical knowledge for this sector and acquire sufficient practical experience necessary that could be useful when products software achievements.
Over the years, I had developed some additional passions in particular: travel, computing (IOT & IP Networks) and Jazz music. It is thus that thanks to these additional skills enriched during all his extra-professional adventures that he was able to establish a bridge between his professional and private life offering him more equally interesting and diversified professional opportunities
I like working on complex projects linked to this fairly cutting-edge technology (preventive maintenance, advanced engine error diagnostics) because it allows me to take on stimulating technical challenges which constantly improve my skills and my expertise in this sector.
As a technical editor for Bosch France, I often had the opportunity to participate in seminars organized by their partners, suppliers or internal distributors. Thus during a professional trip to China to attend a conference on new trends in the Chinese automotive market ( 2020)
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