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Section 5 – SR-2 Diagnostics
37 CHECK ENGINE COOLANT LEVEL
Page 1 of 2
Alarm Type
Log or Shutdown Alarm
Associated Alarm
Codes
Alarm Code 06 Check Coolant Temp Sensor
Circuit Description
Optical Sensor
The 3-wire optical sensor is supplied with + 5 Vdc and common from the microprocessor. The
sensor is located in the coolant tank. The coolant level must be at or above the sensor location. If the sensor is not
submerged in coolant, this alarm will be generated after the condition exists for 3 minutes. This alarm will self-clear
automatically if the coolant level rises above the sensor location. The wiring is located in the Main Harness via the
CLS-01, CLN-01, CLP-01 circuits.
Magnetic Switch
The two wire switch su 5 Vdc from the CLP wire to the CLS wire when the coolant level
is above the switch location. If the coolant level is below the switch location, this alarm will be generated after the
condition exists for 3 minutes. This alarm will self-clear automatically if the coolant level rises above the sensor
location. The wiring is located in the Main Harness via the CLS-01 and CLP-01 circuits.
How Alarm is Set
1. If the engine coolant level input indicates low coolant level for 3 minutes the alarm is set as a Log alarm.
2. If the engine coolant level input indicates low coolant level for 3 minutes, and Alarm Code 06 Check
Coolant Temp Sensor is active, the alarm is set as a Shutdown alarm.
How Alarm is Cleared
The alarm self-clears if coolant level input indicates good coolant level for 30 seconds.
Diagnostic Procedure
CAUTION: Exercise extreme care when checking coolant.
1. Check the engine coolant level and mixture. Be sure coolant is above sensor when the coolant is cold.
2. Check the sensor connector for a pushed pin or missing orange pin lock, loose pin crimp or broken wire.
3. Check that +5 Vdc is present between the (CLP-01) wire from the microprocessor and chassis ground.
4. If an optical sensor, check continuity to ground of the (CLN-01) wire.
5. Check the voltage between the (CLS-01) wire and chassis ground. Voltage should be +5 Vdc when the
sensor or switch is submerged in coolant and less than +0.5 Vdc when the sensor or switch is not
submerged.
5-45
02 February 2005
Summary of Contents for SR-2 SmartReefer2
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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...
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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 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...
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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...
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