Make sure that the coolant level sensor RJ12 cable or M12 cable is securely connected, and is not damaged.The resistance should be approximately 371 Ohms when the float is up and 286 Ohms when it is down. Measure the resistance across the white and black wires when the float is up and when it is down.Remove the cover to access the wires of the variable resistor. If the coolant level sensor does not operate correctly, unplug the coolant level sensor from the machine.
#COOLANT LEVEL INDICATOR FULL#
It takes approximately (1) minute to move from empty to full on the screen, but it starts to move immediately. The coolant level indicator on the screen should move at a slow pace. Your engine’s coolant also known as antifreeze is a vital fluid that keeps the engine’s temperature regulated, improving efficiency and preventing overheating that could damage the motor. Remove the level sensor from the tank and move the float to the maximum travel at both ends. Seeing the Check Coolant Level warning on your dashboard is often a sign you’re about to have a very bad day. The sensor is usually located on the cooling system expansion bottle (coolant bottle) and is easy enough to replace if you have the tools of the trade.The upper-right corner of the screen will show the coolant level. Make sure the coolant level sensor operates correctly: If your coolant level sensor does not display the correct level on the screen, look in the coolant tank to make sure a chip build-up does not block the float from moving freely. Make sure that the cable is securely connected and is not damaged. The sensor is damaged, or the float cannot move.Ĭheck all of the wires and clear chips blocking the float. Air in the coolant system The first thing that could happen if you drive around with low coolant is that the water pump will pump air into the coolant system, which will cause airlocks in the coolant system. The coolant level sensor displays an incorrect coolant level. Here is a more detailed list of what can happen if you ignore & drive around with a low engine coolant level: 1.
Measure coolant pump motor resistance to ground. Extended operation with a leaking coolant level sensor will result in total contamination of the engine wiring harness. No coolant flow and the coolant circuit breaker tripped. Incorrect power phasing - pump motor is running backward. See the No Voltage at the Pump Motor section below. Make sure the overheat jumper for the coolant pump is installed on the I/O PCB.Ĭoolant pump motor does not receive voltage. The overheat jumper at the I/O PCB is missing. Set Setting 32 COOLANT OVERRIDE to NORMAL. Setting 32 COOLANT OVERRIDE is set to IGNORE. No coolant flow and coolant circuit breaker did not trip. Remove coolant check-valve and coolant output hose blockage. Pump intake or coolant output hose blockage Impeller contamination, or impeller damageĬlean filter, check pump intake for blockage.
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