Series 60 DDEC V Troubleshooting – Section 40.2 Troubleshooting Flash Code 36, PID 100/FMI 4

Section 40.2
Troubleshooting Flash Code 36, PID 100/FMI 4

This diagnostic condition is typically:‪

• Open sensor signal circuit
• Open sensor +5 volt supply circuit
• Sensor signal is shorted to sensor return circuit or to ground
• Sensor +5 volt supply is shorted to the sensor return circuit

Section 40.2.1
Multiple Code Check

Perform the following steps to check for multiple codes.‪

1. Plug the diagnostic tool.
2. Turn vehicle ignition switch ON.
3. Read active codes.
   1. If code p 100/4 and no other codes were logged, refer to "40.2.2 Sensor Check" .
   2. If code p 100/4 was logged and none of the following codes were logged: p 110/3 or 4, p 174/3 or 4, p 175/3 or 4, p 101/3 or 4, p 102/3 or 4, p 73/3 or 4, p 94/3 or 4, p 100/3, refer to "40.2.2 Sensor Check" .
   3. If code p 100/4 and any of the following codes were logged: p 110/3 or 4, p 174/3 or 4, p 175/3 or 4, p 101/3 or 4, p 102/3 or 4, p 73/3 or 4, p 94/3 or 4, p 100/3, refer to "79 Engine Harness" .

Section 40.2.2
Sensor Check

Perform the following steps to check the sensor.‪

1. Turn ignition switch OFF.
2. Disconnect OPS connector and install a jumper wire between sockets 2 and 3 of the OPS/EOP Sensor connector. See Figure "Engine Harness Connector to Engine Oil Pressure Sensor" .
3. Turn ignition ON. Read active codes.
4. If active codes p 100/3 or 4 were logged, proceed with the following:
   1. If active code p 100/4 and any other codes were logged, refer to "40.2.3 Check for +5 Volts" .
   2. If code p 100/3 and any other codes except 100/4 were logged, go to step 6 .
5. If active codes p 100/3 or 4 were not logged, warm up engine until either codes are logged or the engine temperature (COOLANT TEMP or OIL TEMP on the DDR) has been greater than 60°C (140°F) for one minute.
   1. If active code p 100/4 and any other codes were logged, refer to "40.2.3 Check for +5 Volts" .
   2. If code p 100/3 and any other codes except 100/4 were logged, go to step 6 .
   

   Figure 1. Engine Harness Connector to Engine Oil Pressure Sensor

6. Turn ignition OFF.
7. Check terminals at the OPS/EOP Sensor connectors (both the sensor and harness side) for damage: bent, corroded and unseated pins or sockets.
   1. If the terminals and connectors are damaged, repair them and refer to "40.2.7.1 Verify Repairs" .
   2. If the terminals and connectors are not damaged, replace the OPS/EOP Sensor. Refer to "40.2.7.1 Verify Repairs" .

Section 40.2.3
Check for +5 Volts

Perform the following steps to check for +5 volts.‪

1. Turn vehicle ignition OFF. Remove jumper wire.
2. Turn ignition ON.
3. Measure voltage on OPS/EOP Sensor harness connector, socket 3 (gray lead) to socket 1 (black lead).
   1. If the voltage measurement is less than 4 volts, refer to "40.2.5 Check for Open +5 Volt Line" .
   2. If the voltage measurement is greater than 6 volts, refer to "40.2.7 Check for Short to Battery + and Ground" .
   3. If the voltage measurement is between 4 and 6 volts, refer to "40.2.4 Check for Signal Open" .

Section 40.2.4
Check for Signal Open

Perform the following steps to check for signal open.‪

1. Turn the ignition OFF.
2. Disconnect the Engine Harness connector at the ECM/ECU. See Figure "Engine Harness Connector to Oil Pressure Sensor" .
3. Install a jumper wire between sockets 1 and 2 of the OPS/EOP Sensor harness connector.
4. Measure resistance between sockets E-15 and E-31 on the Engine Harness connectors.
   1. If the resistance measurement is less than or equal to 5 Ω, refer to "40.2.7 Check for Short to Battery + and Ground" and go to step 4 .
   2. If the resistance measurement is greater than 5 Ω or open, the signal line (E-31) is open. Repair the open and refer to "40.2.7.1 Verify Repairs" .
   

   Figure 2. Engine Harness Connector to Oil Pressure Sensor

Section 40.2.5
Check for Open +5 Volt Line

Perform the following steps to check for open +5 volt line.‪

1. Turn the ignition OFF. Disconnect the Engine Harness connectors at the ECM/ECU.
2. Install a jumper wire between pins 1 and 3 of the OPS/EOP Sensor connector.
3. Measure resistance between sockets E-15 and E-12 on the Engine Harness connector. See Figure "ECM/ECU Engine Harness/Vehicle Harness Connector" .
   1. If the resistance measurement is less than or equal to 5 Ω, refer to "40.2.6 Check for Short" .
   2. If the resistance measurement is greater than 5 Ω or open, the engine +5 volt line (E-12) is open. Repair the open and refer to "40.2.7.1 Verify Repairs" .

Figure 3. ECM/ECU Engine Harness/Vehicle Harness Connector

Section 40.2.6
Check for Short

Perform the following steps to check for a short.‪

1. Remove jumper wire.
2. Measure resistance between sockets 1 and 3 on the OPS/EOP Sensor harness connector. Also measure resistance between socket 3 and a good ground.
   1. If either resistance measurement is less than or equal to 100 Ω, the engine +5 volt line (E-12) is shorted to the return line (E-15) or battery ground. See Figure "ECM/ECU Engine Harness/Vehicle Harness Connector" . Repair the short and refer to "40.2.7.1 Verify Repairs" .
   2. If the resistance measurement is greater than 100 Ω or open, replace OPS/EOP Sensor and go to step 3 .
3. Check terminals at the ECM/ECU harness connector (both ECM/ECU and harness side) for damage: bent, corroded and unseated pins or sockets. Check E-12, E-15, and E-31 terminals and pins at ECM/ECU.
   1. If the terminals and connectors are damaged, repair them and refer to "40.2.7.1 Verify Repairs" .
   2. If the terminals and connectors are not damaged, reprogram the ECM/ECU. Refer to "40.2.7.1 Verify Repairs" .

Section 40.2.7
Check for Short to Battery + and Ground

Perform the following steps to check for a short to battery.‪

1. Remove both fuses to the ECM/ECU.
2. Disconnect the Vehicle Interface Harness connector at the ECM/ECU.
3. Measure resistance between socket E-31 on the Engine Harness connector and socket V-15 of the Vehicle Interface Harness connector, and between E-31 and V-61 and V-65. See Figure "ECM/ECU Engine Harness/Vehicle Harness Connector" .
   1. If resistance measurement is greater than 100 Ω, or open, replace OPS/EOP Sensor. Refer to "40.2.7.1 Verify Repairs" .
   2. If resistance measurement is less than or equal to 100 Ω, a short exists between sockets where less than 100 Ω resistance was read. Repair short and reinsert fuses and go to step 4 .
4. Turn vehicle ignition OFF and remove jumper wire. Measure resistance between sockets E-31 and E-15 on the Engine Harness connector. See Figure "ECM/ECU Engine Harness/Vehicle Harness Connector" .
   1. If resistance measurement is greater than 100 Ω, or open, go to step 5 .
   2. If resistance measurement is less than or equal to 100 Ω, the signal line (E-31) and return line (E-15) are shorted together. Repair the short. Refer to "40.2.7.1 Verify Repairs" .
5. Measure resistance between socket E-31 and a good ground. Also measure resistance between E-31 and E-15. See Figure "ECM/ECU Engine Harness/Vehicle Harness Connector" .
   1. If both resistance measurements are greater than 100 Ω or open, replace OPS/EOP Sensor. Refer to "40.2.7.1 Verify Repairs" .
   2. If either resistance measurement is less than 100 Ω, the signal line (E-31) is shorted to the return line (E-15) or battery ground. Repair short and refer to "40.2.7.1 Verify Repairs" .

Section 40.2.7.1
Verify Repairs

Perform the following steps to verify repairs.‪

1. Turn ignition switch OFF. Reconnect all connectors.
2. Turn ignition ON. Clear codes.
3. Start and run the engine for one minute. Stop engine.
4. Check diagnostic tool for codes.
   1. If no codes are logged, troubleshooting is complete.
   2. If code p 100/4 is not logged, and other codes are logged, refer to "18.3 First Step for Diagnosing a Fault Within the DDEC System" .
   3. If code p 100/4 is logged and other codes are logged, review this section from the first step to find the error. Refer to "40.2.1 Multiple Code Check" .