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Section 5 – SR-2 Diagnostics
31 CHECK OIL PRESSURE SWITCH
Page 1 of 2
Alarm Type
Log or Shutdown Alarm
Associated Alarm
Codes
Alarm Code 19 Low Engine Oil Pressure
Alarm Code 66 Low Engine Oil Level
Component Description and Location
The oil pressure switch is located at the side of the oil filter housing.
Circuit Description
The low oil pressure switch circuit is a single wire circuit. The 20B wire connects the interface board 36 pin
connector J7 pin 28 to one side of the low oil pressure switch. The switch is not polarity sensitive and closes on
low oil pressure. The switch wires are routed in the Main Harness. The switch screw terminal is connected to the
sensor harness.
How Alarm is Set
1. If unit is in diesel mode but not running, the oil level is good, and the oil pressure switch is not indicating
low oil pressure, Alarm Code 31 Check Oil Pressure Switch is set as a Log alarm.
2. If unit is in diesel mode but not running, the oil level is not good, and the oil pressure switch is not indicating
low oil pressure, Alarm Code 31 Check Oil Pressure Switch is set as a Shutdown alarm.
3. If unit is running in electric mode and the oil pressure switch is not indicating low oil pressure, Alarm Code
31 Check Oil Pressure Switch is set as a Log alarm.
How Alarm is Cleared
This alarm is cleared manually
.
Considerations
If this alarm is set as a Shutdown alarm in diesel mode operation, it becomes a log alarm if unit is switched to
electric mode operation.
If the alarm exists in electric mode and the unit is switched to diesel, either condition #1 or #2 in the “How Alarm is
Set” section above apply.
Diagnostic Procedure
1. Display the oil pressure when the unit is not running, using the Gauge menu. The oil pressure should show
[LOW]. If not, the switch may be stuck open or the switch circuit may be open.
2. Check the 20B-01 wires in the Interface Harness with an ohmmeter for continuity, per Service Procedure
H04A
5-40
02 February 2005
Summary of Contents for SR-2 SmartReefer2
Page 4: ......
Page 7: ...Tab goes here and the next page should be GREEN Section 1 Safety...
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Page 10: ...Section 1 SR 2 Safety Information 1 2 18 January 2005...
Page 14: ...Section 1 SR 2 Safety Information 1 6 18 January 2005...
Page 15: ...Tab goes here and the next page should be GREEN Section 2 Hardware Description...
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Page 48: ...Section 2 SR 2 Hardware Description 2 32 31 January 2005...
Page 49: ...Tab goes here and the next 2 pages should be GREEN Section 3 Software Description...
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Page 96: ...Section 3 SR 2 Software Description 3 46 31 January 2005...
Page 97: ...Tab goes here and the next page should be GREEN Section 4 Operation...
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Page 181: ...Tab goes here and the next 2 pages should be GREEN Section 5 Diagnostics...
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Page 266: ...Section 5 SR 2 Diagnostics 5 84 02 February 2005...
Page 267: ...Tab goes here and the next page should be GREEN Section 6 Service Procedures...
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Page 270: ...Section 6 SR 2 Service Procedure Index Page 2 01 February 2005...
Page 282: ...Section 6 SR 2 Service Procedure A01B Page 6 P41RA01B 31 January 2005...
Page 298: ...Section 6 SR 2 Service Procedure A02A Page 12 P41RA02A 02 February 2005...
Page 318: ...Section 6 SR 2 Service Procedure A03B Page 4 P41RA03B 30 January 2005...
Page 338: ...Section 6 SR 2 Service Procedure A15A Page 4 P41RA15A 30 January 2005...
Page 360: ...Section 6 SR 2 Service Procedure A46B Page 8 P41RA46B 30 January 2005...
Page 366: ...Section 6 SR 2 Service Procedure A48A Page 6 P41RA48A 30 January 2005...
Page 376: ...Section 6 SR 2 Service Procedure A50A Page 6 P41RA50A 31 January 2005...
Page 394: ...Section 6 SR 2 Service Procedure F08A Page 4 P41RF08A 30 January 2005...
Page 398: ...Section 6 SR 2 Service Procedure F09A Page 4 P41RF09A 30 January 2005...
Page 402: ...Section 6 SR 2 Service Procedure G03A Page 4 P41RG03A 31 January 2005...
Page 406: ...Section 6 SR 2 Service Procedure H04A Page 4 P41RH04A 30 January 2005...
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Page 410: ...Section 7 SR 2 Information 7 2 02 February 2005...
Page 419: ...Tab goes here and the next page should be GREEN Section 8 Schematics and Wiring Diagrams...
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Page 422: ...Section 8 SR 2 Drawings 8 2 01 February 2005...
Page 424: ...Section 8 SR 2 Drawings 8 4 01 February 2005...
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