OPS: Oil pressure Sensor - entry Voltage short (DETROIT 60 Series)

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Figure 1.1 - Oil push Circ short (EEC Display)

ECM has actually dropped listed below 5% (normally
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Figure 1.2 - Oil pressure Sensor
2. Turn auto ignition move ON. Read More:How to Connecting DETROIT Engine using Detroit Diesel Diagnostic attach (DDDL).

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→If flash password 100/4 and also 19/4 were logged and none that the following codes were logged: 19/3. 110/3 or 4, 174/3 or 4, 175/3 or 4, 101/3 or 4, 102/3 or 4, 73/3 or 4, 94/3 or 4, 100/3, describe "Sensor Check".
→If flash password 100/4 and 19/4, and also any of the adhering to codes to be logged: 19/3, 110/3 or 4, 174/3 or 4, 175/3 or 4, 101/3 or 4, 102/3 or 4, 73/3 or 4, 94/3 or 4, 100/3, describe "Engine Sensor Harness".
NOTE: In this case, multiple energetic codes (Input Voltage Low) space present:172/4 (Air Inlet Temp)94/4 (Fuel push Sensor)174/4 (Fuel Temp Sensor)100/4 (Oil push Sensor)404/4 (TCO Temp)102/4 (Turbo an increase Sensor)P148/4 (Unknown Error)
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Figure 1.3 - fault Codes (Logged)

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Figure 1.4 - Unknown Error (P148/4)

2). Sensor Check
Perform the complying with steps to check the sensor.1. Turn ignition move OFF.2. Disconnect OPS connector and also install a jumper wire in between sockets B and C of the OPS harness connector. See number 1-2.3. Turn ignition ON.4. Read active codes.5. If energetic codes 100/3 or 4 or 19/3 or 4, to be logged, continue with the following:→If active codes 100/4 or 19/4 and also any various other codes to be logged, refer to "Check because that +5 Volts".→If codes 100/3 or 19/3, and any other codes except 100/4 or 19/4 to be logged, describe "Check Oil press Sensor Connectors".6. If energetic codes 100/3 or 4 or 19/3 or 4 were not logged, heat up engine until either codes are logged or the engine temperature (COOLANT TEMP or OIL TEMP) has been higher than 60 deg C (140 deg F) because that one minute.→If energetic codes 100/4 or 19/4, and also any other codes were logged, refer to "Check because that +5 Volts".→If codes 100/3 or 19/3 and any various other codes other than 100/4 or 194 to be logged, describe section "Check Oil pressure Sensor Connectors".
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Figure 1.5 - Engine exploit Connector to Oil push Sensor
3).Check Oil pressure Sensor Connectors
Perform the adhering to steps to inspect the OPS connectors.1. Revolve ignition OFF.2. Examine terminals in ~ the OPS connectors (both the sensor and harness side) for damage: bent, corroded and unseated pins or sockets.→If the terminals and connectors space damaged, repair them.→If the terminals and connectors are not damaged, change the OPS.
Perform the following steps to examine for +5 volts.1. Turn auto ignition OFF.2. Eliminate jumper wire.3. Rotate ignition ON.4. Measure voltage on OPS exploit connector, socket C (red lead) come socket A (black lead).→If the voltage measurement is less than 4 volts, describe "Check for open up +5 Volt Line".→If the voltage measurement is higher than 6 volts, refer to "Check for brief to Battery +".→If the voltage measure up is in between 4 and 6 volts, describe "Check because that Signal Open".5).Check for Signal Open
Perform the following steps to examine for signal open.1. Revolve the ignition OFF.2. Disconnect the engine harness connector in ~ the ECM. See number 1-5.3. Download a jumper wire in between sockets A and also B the the OPS harness connector.4. Measure up resistance in between sockets P2 and also Y2 on the engine harness connectors.→If the resistance measure is much less than or equal to 5 ohms, refer to "Check for brief to Ground".→If the resistance measure up is higher than 5 ohms or open, the signal line (#530) is open. Fix the open.6).Check because that ShortPerform the following steps to check for a short.1. Eliminate jumper wire.2. Measure resistance in between socket P2 and a an excellent ground. Also measure resistance between P2 and Y2.→If both resistance dimensions are better than 100 ohms or open, replace OPS.→If either resistance measure up is much less than 100 ohms, the signal heat (#530) is shorted come the return heat (#452) or battery ground. Fix short.7).Check ECM ConnectorsPerform the following steps to examine ECM connectors.1. Inspect terminals at the ECM exploit connector (both ECM and also harness side) for damage: bent, corroded and also unseated pins or sockets. Check W1, P2 and also Y2 terminals and pins in ~ ECM.→If the terminals and connectors space damaged, fix them.→If the terminals and also connectors room not damaged, reprogram the ECM.8).Check for open +5 Volt LinePerform the following steps to examine for open +5 volt line.1. Rotate ignition OFF.2. Disconnect the engine harness connectors in ~ the ECM.3. Install a jumper wire between pins A and C of the OPS connector.4. Measure up resistance in between sockets W1 and also Y2 ~ above the engine harness connector.→If the resistance measure is much less than or same to 5 ohms, describe "Check for Short".→If the resistance measure is higher than 5 ohms or open, the engine +5 volt line (#416) is open. Fix the open.9).Check for ShortPerform the following steps to check for a short.1. Eliminate jumper wire.2. Measure up resistance between sockets A and C top top the OPS harness connector. Likewise measure resistance between socket C and a an excellent ground.→If either resistance measure is much less than or equal to 100 ohms, the engine +5 volt line (#416) is shorted to the return line (#452) or battery ground. Fix the short.→If the resistance measure is higher than 100 ohms or open, change OPS and refer "Check ECM Connectors".10).Check for short to Battery +Perform the adhering to steps to examine for a brief to battery.1. Remove both fuses come the ECM.2. Disconnect the automobile harness and also 5-way power connectors at the ECM. See figure 1-6.3. Measure resistance in between socket W1 ~ above the engine harness connector and socket B3 the the automobile harness connector, and between W1 and the 5-way power harness sockets A and also C.→If resistance measure up is higher than 100 ohms, or open, replace OPS.→If resistance measurement is less than or equal to 100 ohms, a brief exists in between sockets where much less than 100 ohms resistance was read. Fix short and also reinsert fuses.
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Figure 1.6 -ECM car Harness Connector
11).Check for short to Ground
Perform the complying with steps to examine for a brief to ground.1. Turn automobile ignition OFF.2. Remove jumper wire.3. Measure up resistance in between sockets P2 and Y2 ~ above the engine exploit connector. See figure 1-5.→If resistance measurement is better than 100 ohms, or open, describe section "Check because that Short".→If resistance measure up is much less than or equal to 100 ohms, the signal heat (#530) and also return heat (#452) room shorted together. Fix the short.

Engine Sensor Harness

Description: shows a error within the Engine Sensor harness affecting signals of various sensors provided by the DDEC system.

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TROUBLESHOOTING ENGINE SENSOR HARNESSThe following procedure will troubleshoot the engine sensor harness.Note: use this to the ECM and harness connected with the fault.1).Check for low Battery VoltagePerform the following steps to inspect for short battery voltage.1. Plugin the diagnostic data reader (DDR).→If flash code 168/1 is logged, describe "TROUBLESHOOTING FLASH code 46", will certainly write on following post.→If flash password 168/1 is no logged, describe "Check for +5 Volts".2).Check for +5 VoltsPerform the adhering to steps to examine for +5 volts.1. Turn vehicle ignition switch OFF.2. Disconnect the Oil push Sensor (OPS) and Turbo boost Sensor (TBS) connectors.3. If applicable, disconnect the Fuel pressure Sensor (FPS).4. Turn auto ignition move ON.5. At each sensor harness connector, measure voltage between socket C (red lead) and socket A (black lead).→If the voltage measure is in between 4.7 and 5.2 volts, the voltage reading is correct. Inspect voltage at the next connector. If every connector voltage readings space correct, describe "Check ECM Connectors".→If the voltage measure is less than 4.7 volts at any kind of or every connectors, refer to "Check because that +5 volts or Return Open".→If the voltage measure up is better than 5.2 volts at all connectors, describe section "Check for quick to Battery".3).Check ECM ConnectorsPerform the adhering to steps to inspect the ECM connectors.1. Check terminals in ~ the ECM engine harness connector (both the ECM and harness side) because that damaged, bent, corroded and unseated pins or sockets.→If the terminals and connectors are not damaged, examine all sensors, particularly OPS, TBS, and TPS (on car system), this indicates that there is no trouble on the engine sensor harness.→If the terminals and also connectors are damaged, fix them.4).Check because that +5 volts or Return OpenPerform the complying with steps to examine for +5 volts or return open.1. Turn vehicle ignition switch OFF.2. Disconnect the engine harness connector at the ECM.3. Install a jumper wire between sockets A and C of any sensor connector that reads much less than 4.7 volts. Refer to "Check because that +5 Volts".4. Measure up resistance in between sockets W1 and also Y2 that the engine exploit connector.→If the resistance measure up is less than or same to 5 ohms, describe "Check for quick to Ground".→If the resistance measure is higher than 5 ohms or open, one of two people the engine +5 volt line(#416), or the return heat (#452) is open. Fix the open.5).Check for quick to GroundPerform the adhering to steps to inspect for quick to ground.1. Turn vehicle ignition switch OFF.2. Remove jumper wire.3. Measure resistance in between sockets A and C the the sensor connector.4. Measure up resistance between socket C of the sensor connector and also a an excellent ground.→If the resistance measurement because that both readings is greater than 1,000 ohms or open, refer to "Check ECM Connectors".→If either resistance measurement is less than or equal to 1,000 ohms, the engine +5 volt heat (#416) is shorted to either the sensor return heat (#452) or to chassis ground. Repair the short.6).Check for short to Battery