Thermo king alarm code 63 is a red alert that demands immediate action when your diesel engine stops. Addressing this alarm promptly is crucial to ensure smooth operations.
There can be various reasons behind the code 63, making it a bothersome issue.
- As a first step, check if the fuel filters are running low on fuel when this occurs and rule out any clogged pipelines. Most of the time, Thermo King Alarm 63 is triggered due to fuel-related problems.
- When the engine halts, it is often referred to as an engine lock.
- Heat can be a common cause of this issue.
- Excessive heat in the exhaust system, engine, or ambient temperature can cause fuel to vaporize in the lines, leading to engine shutdown.
- To address this problem effectively, allow the engine to cool down. Find a shady spot and park your vehicle. Let the engine rest for a few minutes.
What to do with Thermo King Alarm 63 Reefer?
- Download and inspect ServiceWatch data log information.
- Review the data using technical user level to determine the operating conditions when Alarm 63 was triggered.
- Use the running service test mode to replicate operating conditions as needed.
- Operating data can be viewed in technical mode.
- Perform a pre-trip test to identify the cause of the engine shutdown.
- Check for other alarm codes and proceed accordingly for each code.
What to do with Thermo King Alarm 63 Physically?
- Verify the fuel level and check the fuel pump for proper operation.
- Inspect the air filter and intake hose for any obstructions.
Understand the Thermo King Error 63:
Thermo King Fuel System:
- The electric fuel pump (5) creates a vacuum in the supply line in the fuel tank (1).
- Atmospheric pressure in the fuel tank (1) pushes the fuel upwards (line 6).
- The fuel reaches the fuel filter (7) and part of it travels to the mechanical injection pump (9).
- The fuel is distributed to the engine’s pistons through injectors (10) following the engine’s sequence.
Check the fuel level sensor.
- Inspect the fuel level sensor, pins, and connector terminals.
- Ensure there are no physical damages to the switch.
- Check for damaged or corroded pins in the connector.
- Check for voltage at the harness plug between the pins for negative and positive.
- The voltage should be approximately 12 Volts DC.
- Check the voltage at the harness plug between the pins.
- Check the cable continuity from the harness pin to the microprocessor plug.
- Place the ignition switch, run, and off in the OFF position before checking continuity.
- It should be less than 10 ohms.
Thermo King Fuel Solenoid and Alarm 63:
- When the fuel solenoid is energized, it allows fuel to flow to the injection pump, providing final fuel supply to the injectors.
- This system works as a shutdown system to turn off the system.
- Check if there is power to the fuel cutoff solenoid with the ignition on and the engine starting. If there is no power, make sure to test all fuses and relays. Also, inspect the wiring of the fuel cutoff solenoid for any damages.
Perform the necessary electrical checks to overcome code 63:
- Verify unit fuses.
- Check if the RPM sensor is functioning correctly.
- Review operating relay components and circuits and the fuel solenoid.
- Check for low battery voltage.
- Ensure all ground connections on the master ground plate are secure.
- Check for a seized compressor or motor.
Thermo King Fault Alarm 63:
The starter motor is responsible for providing the initial impulse to the diesel engine to allow it to reach its first revolutions.
The main components of the starter motor are:
- Pinion Gear
- Starter Motor
- Plunger
- Starter Solenoid
- Pinion Assembly
- Ring Gear
When the starter motor is energized, it engages the diesel engine through the coupling solenoid. Once the diesel engine starts spinning on its own, the solenoid separates the pinion and disconnects the starter motor.
