JLG ERT2669, Service And Maintenance Manual

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SECTION 5 - JLG CONTROL SYSTEM
31215923 5-31
437 4 3 “Engine Trouble Code (523729:2 - LPG Fuel
System Error)”
Engine Will Limit RPM to 2500 and
Throttle to 30%. • The ECU is detecting the Gaseous Solenoid is Higher than
98% or Less than 2%.
• Check for Exhaust leak upstream, fuel pressure/property
abnormality, mixer malfunction, vaporizer malfunction, wir-
ing harness damage or 02 sensor malfunction.
437 4 3 “Engine Trouble Code (523715:2 - A/d
Converter Error)"
Engine Will Shutdown. • ECU is detecting a Microprocessor Error.
• Check for A/D Converter malfunction.
437 4 3 “Engine Trouble Code (628:13 - ROM
Error)"
Engine Will Shutdown. • ECU is detecting a Microprocessor Error.
• Check for ROM malfunction.
437 4 3 “Engine Trouble Code (523720:12 - RAM
Error)"
Engine Will Shutdown. • ECU is detecting a Microprocessor Error.
• Check for RAM malfunction.
437 4 3 "Engine Trouble Code (629:12 - Mutual
Surveillance Error)”
Engine Will Shutdown. • ECU is detecting a Microprocessor Error.
• Check for Microprocessor malfunction.
437 4 3 "Engine Trouble Code (523722:12 - Sys-
tem LSI Error)”
Engine Will Shutdown. • ECU is detecting a System LSI Error.
• Check LSI for damage or faulty wiring.
437 4 3 "Engine Trouble Code (523724:31 - Lock
Off Valve Error)"
Engine Will Shutdown • ECU detected that the Engine Continued to Run after the Key
was Powered Off.
• Check the Lock Off Valve and Relay for malfunction or har-
ness for a short to battery.
437 4 3 "Engine Trouble Code (523728:2 - Trim
Valve Error)"
No Response. • ECU is detecting the Trim Valve Voltage is Low.
• Check Valve for damage or faulty wiring.
437 4 3 "Engine Trouble Code (1347:2 - Fuel Pump
Error)"
No Response. • ECU is detecting the Fuel Pump Voltage is Low.
• Check Fuel Pump for damage or faulty wiring.
437 4 3 "Engine Trouble Code (1485:3 - Power
Relay Error)"
No Response. • ECU is detecting a Power Relay Malfunction.
437 4 3 "Engine Trouble Code (3509:4 - Sensor
Power Source Error)”
Engine will Limit Throttle to 30%. • ECU is detecting the Sensor Power Source is Less than 4.1V.
• Check ECU for damage or faulty wiring.
437 4 3 “Engine Trouble Code (695:9 - Can Frame
Error)"
Engine will be forced to Idle speed
and the Throttle is Limited to 15%. • ECU is detecting a CAN System malfunction.
• Check ECU wiring harness and CAN wiring for damage.
437 4 3 "Engine Trouble Code (523721:2 -
EEPROM Error)"
No Response. • ECU is detecting an EEPROM Error with its Unique ID.
• Check ECU for damage.
437 4 3 "Engine Trouble Code (105:0 - Intake Man-
ifold Temp Exceeds Stage2)"
Engine Will Shutdown. • ECU is detecting the Intake Manifold Temp greater than or
equal to 190.4°F (88°C).
• Check Intake Air Temp on High Side Stage 2.
437 4 3 "Engine Trouble Code (105:15 - Intake
Manifold Temp Exceeds Stage1)"
Engine Will Limit RPM to 2500 and
Throttle to 30%. • ECU is detecting the Intake Manifold Temp is greater than or
equal to 160°F (71°C).
• Check Intake Air Temp on High Side Stage 1.
437 4 3 “Engine Trouble Code (168:15 - ECU Bat-
tery Voltage High)"
Engine Will Limit RPM to 2500 and
Throttle to 20%. • ECU is detecting the Battery Voltage is greater than or equal
to 16.0V.
437 4 3 “Engine Trouble Code (168:17 - ECU Bat-
tery Voltage Low)"
Engine Will Limit RPM to Idle and
Throttle to 20%. • ECU is detecting the Battery Voltage is less than or equal to
8.0V.
437 4 3 "Engine Trouble Code (110:0 - Engine
Coolant Temp Exceeds Stage2)"
Engine Will Shutdown • ECU is detecting the Engine Coolant Temperature is greater
than or equal to 115C.
437 4 3 "Engine Trouble Code (110:15 - Engine
Coolant Temp Exceeds Stage2)"
Engine Will Limit RPM to 2500 and
Throttle to 30% • ECU is detecting the Engine Coolant Temperature is greater
than or equal to 115C.
438 4 3 “High Engine Temperature” Engine Will Shutdown. • ECU is detecting the Engine Coolant Temperature is higher
than or equal to 239°F (115°C).
DTC
Code
Flash
Code
Description Action Item Check List