Its coming up with the fault on the screen engine temperature too high please drive moderately to cool off the engine if fault persits please contact bmw service center,sometimes it says engine overheated swith off engine.(2005 E60 523A).
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Re: Its coming up with the fault on the screen engine...
Hello my name is Heath it will be my pleasure to assist you. First thing To check is the coolant. Be sure the coolant level is topped off as this will cause the engine to overheat bringing up the error code.
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Your vehicle cooling fan's are controlled by three relay's , couple of fuse's an the PCM - engine computer . The engine coolant temp. sensor is a input to the PCM , when engine temp get's to 212 the PCM will turn on the cooling fans in low speed . Checking to see what the actual temp is with a scan tool an a infrared thermometer at the thermostat housing ,an looking up the specification's in a service repair manual is how to diagnose . Not guessing an replacing parts . Plus learning how the cooling fan's work . Relay Driven Dual Cooling Fan Diagnostics Reading factory service info as to how they work also would be a good idea .
Cooling Fan Control - Two Fan System
The engine cooling fan system consists of 2 puller type electrical cooling fans and 3 fan relays. The relays are arranged in a series parallel (S/P) configuration that allows the engine control module (ECM) to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood fuse block. The ground path is provided at G104.
During low speed operation, the ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. This energizes the low speed fan relay coil, closes the relay contacts, and supplies battery positive voltage from the low fan fuse through the cooling fan motor supply voltage circuit to the left cooling fan. The ground path for the left cooling fan is through the cooling fan S/P relay and the right cooling fan. The result is a series circuit with both fans running at low speed.
During high speed operation the ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. After a 3 second delay, the ECM supplies a ground path for the high speed fan relay and the cooling fan S/P relay through the high speed cooling fan relay control circuit. This energizes the cooling fan S/P relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time, the high speed fan relay coil is energized closing the relay contacts, and provides battery positive voltage from the high fan fuse on the cooling fan motor supply voltage circuit, to the right cooling fan. During high speed fan operation, both engine cooling fans have their own ground path. The result is a parallel circuit with both fans running at high speed.
The ECM commands the low speed cooling fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 94.5°C (202°F).
• A/C refrigerant pressure exceeds 1447 kPa (210 psi).
• After the vehicle is shut OFF, if the engine coolant temperature at key-off is greater than 101°C (214°F), the low speed fans will run for a minimum of 60 seconds. After 60 seconds, if the coolant temperature drops below 101°C (214°F), the fans will shut OFF. The fans will automatically shut OFF after 3 minutes, regardless of coolant temperature.
The ECM commands the high speed fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 104.25°C (220°F).
• A/C refrigerant pressure exceeds approximately 1824 kPa (265 psi).
• When certain DTCs set
At idle and very low vehicle speeds the cooling fans are only allowed to increase in speed, if required. This ensures idle stability by preventing the fans from cycling between high and low speed.
the problem is the transmission has a fault and is overheating the transmission oil
The transmission oil is cooled by a cooler in a tank of the radiator.
the high temperature of the transmission oil is what is causing the engine to over heat when driving but not at idle as that when the temperature in the oil is at it's highest
run the fault codes
If you are towing or travelling at high speeds it would make the problem worse
Take it to an accredited transmission specialist and have the transmission properly diagnosed
Engine Coolant Temperature Circuit Intermittent
Our emissions expert has put together the following information about the P0119 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code. OBD II Fault Code
OBD II P0119
Fault Code Definition
Engine Coolant Temperature Circuit Intermittent
What does Mean?The Engine Coolant Temperature Sensor measures the rise and fall of the Engine Coolant Temperature. This provides critical data needed for the Powertrain Control Module (PCM) to control the Air Fuel Ratio, the Ignition Spark Timing, the cooling fans, and many components of the Emissions Control Systems. The Engine Coolant Temperature Sensor converts the coolant temperature into a voltage that is high when the engine is cold and low as the engine warms up.
Code P0119 indicates an intermittent voltage input from the Coolant Temperature Circuit to the PCM.
if the car in the process of operation, coolant temperature gauge indicatorquickly reached 100 degree, or launch in the cold car, engine coolanttemperature rises rapidly to boiling, to make up for the coolant to normal, but the engine power output decreased significantly, the mechanical system of engine system failure. The cause of the fault of cooling system are: seriousWater Leakage; cylinder pad insulation jacket and cylinder impact; the thermostat main valve off; fan belt loosening or fracture; pump shaft and impeller loose; fan clutch side. Use obd2 for automotive diagnostics , you can improve vehicle safety performance and driving more safer.
It is very important that the engine not overheat! The head can crack and this would be very bad. I think your car is too new to need a new radiator. Make sure the coolant level is correct. Check the thermostat housing for leaks. When the engine is hot, check if the fan clutch is locked up and actually driving the fan. Turn the engine off and grab the fan and try to turn it. It should turn stiffly. If it spins freely the fan clutch is dead. It is possible that the water pump impeller has failed, especially if it is a plastic one.
Fifteen minutes! you have bigger problems than only the fans the fans are controlled by a thermo switch that is heated by the coolant, If you have no coolant the sensor cannot activate But fifteen minutes seems like you may have a headgasket problem and steam cannot heat the coolant sensor.OperationNotesThe electric cooling fan operates when the engine cooling temperature exceeds a certain value. The cooling fan on this engine is controlled by the Powertrain Control Module (PCM) . The PCM turns the cooling fan ON by grounding the coil of the cooling fan relays when certain conditions are met. When the A/C is requested, the cooling fan will also be turned ON.
Power for the cooling fan motors are supplied through Maxifuses(R). The cooling fan relays are energized when current flows from the fuses in the Underhood Accessory Wiring Junction Block, and through the relay coils to ground through the PCM. The Coolant Fan 1 Relay Control Circuit is grounded for low speed fans operation. During low speed fans operation, both fans run at a slow speed. The Coolant Fan 1 Relay Control Circuit is grounded for high speed operation. During high speed fans operation, both fans run at high speed.
IMPORTANT: When certain Diagnostic Trouble Codes (DTCs) are present, the PCM may command the cooling fans to run all the time. Perform the A Powertrain On Board Diagnostic (OBD) System Check prior to diagnosing the engine cooling fans.
For more information regarding the Charging System, refer to Charging System Description , and Charging System Circuit Description in Starting and Charging.
If a problem that involves the low speed cooling fan relay control circuit exists, DTC P0480 Cooling Fan Relay 1 Control Circuit should set. If the problem affects the high speed cooling fan relay control circuit, DTC P0481 Cooling Fan Relay 2 Control Circuit should set. A problem with the ECT sensor should set DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage, DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage, DTC P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage, DTC P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage. Any of these DTCs will affect cooling fan operation and should be diagnosed before using the Electric Cooling Fan Diagnosis.
For more information regarding the Cooling System refer to Engine Cooling Fan Description - Electric, and Cooling System Description in Cooling System.
Here is the electrical schematic and how it all is suppose to work, If you need any further help please contact me Thank you,Randy If you find this information helpful please give me a good rating