Volvo All Engines (2004 Emissions) Fault Code: PID 100 FMI 3 Engine Management System Module-Engine Oil Pressure
Fault Condition: The Electronic Malfunction Lamp (EML) will illuminate when the EOP Sensor’s 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 will become inactive.
Possible repairs:
Turn the ignition key OFF first.
1) Disconnect EMS Module connectors A and B. Disconnect Engine Oil Pressure (EOP) Switch connector. Check for continuity between Engine Oil Pressure (EOP) Sensor harness connector pin 2 (signal line) and a good ground and also check for continuity between EMS Module connector B pin 11 and all other pins on EMS Module connector A and B. If continuity exists, locate and repair the short circuit.
2) Disconnect EMS Module connector B. Check for continuity between Engine Oil Pressure (EOP) Sensor harness connector pin 1 (reference voltage line) and EMS Module harness connector B pin 17 . If there is NO continuity, repair the open in the harness reference voltage line.
3) Disconnect the Engine Oil Pressure (EOP) Sensor. Disconnect EMS Module connectors and B. Check for continuity between EMS Module harness connector B pin 11 (signal line) and all other pins in the EMS Module harness connectors A and B. If continuity exists or if there is a visual short, repair the short circuit to the signal line. If there is NO continuity or visual short, replace the EMS Module.
4) Disconnect the Engine Oil Pressure (EOP) Sensor. Disconnect EMS Module connector B. Check for continuity between EOP sensor harness connector pin 2 (signal line) and EMS Module harness connector B pin 11.
If there is NO continuity, repair the open in the harness signal line.
5) Disconnect the Engine Oil Pressure (EOP) Sensor. Disconnect EMS Module connectors A and B. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS Module harness connectors A and B. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line. If there is NO continuity or visual short, replace the EMS Module.
6) Disconnect EMS Module connectors A and B. Disconnect the Engine Oil Pressure (EOP) Sensor. Check for continuity between EMS Module harness connector B pin 17 (reference voltage line) and all other pins in EMS
Module harness connectors A and B. Visually check EMS Module connector B pin 17 for a short circuit. If continuity exists or if there is a visual short, repair the short circuit to the reference voltage line.
If there is NO continuity or visual short circuit, replace the EMS Module.
7) Disconnect EMS Module connectors A and B. Disconnect the Engine Oil Pressure (EOP) Sensor. Check for continuity between EMS Module harness connector B pin 18 (ground line) and all other pins in EMS Module harness
connectors A and B (see Figure 59). If continuity exists or if there is a visual short circuit, repair the short to the return line. If there is NO continuity or visual short circuit, replace the EMS Module.
8) Visually inspect both sides of EMS Module connector B pin 11 for a repairable open in the signal line. If a repairable open is found, repair or replace EMS Module harness connector B.
9) Visually inspect both sides of the Engine Oil Pressure (EOP) Sensor connector for a repairable open. If there is a repairable fault or any of the pins feel loose, repair or replace the connector.
10) Remove the Engine Oil Pressure (EOP) Sensor from the oil filter assembly. Connect the EOP Sensor to a regulated air supply with an accurate pressure gauge. Connect a jumper wire between EOP Sensor pin 1 and pin 1 on the sensor harness connector. Connect a jumper wire between EOP Sensor pin 4 and a good ground. Turn the ignition key ON. Measure the voltage between EOP sensor pin 2 and a good ground at various pressures between 0 psi and 101.5 psi. If the EOP Sensor output is correct throughout the entire pressure range, reinstall the sensor and replace the EMS Module. If the EOP Sensor output is NOT correct throughout the entire pressure range,
replace the EOP Sensor and recheck the system.
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