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Home >> Smart >> 2017 >> Fortwo Proxy, 2D Convertible, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical System - Engine - 453 Chassis >> Testing & Repair >> Remove/Install Coolant Temperature Sensor - AR15.60-P-2711SR

Remove/Install Coolant Temperature Sensor - AR15.60-P-2711SR

ENGINE 281 in MODEL 453 

G12094576Courtesy of MERCEDES-BENZ USA

Shown on engine 281.920 

  Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant. Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.
AS20.00-Z-0001-01A
NOTES Notes on coolant   AH20.00-N-2080-01A
REMOVINGINSTALLING Remove/install     
1 Remove maintenance flap    
2 Screw cap onto expansion reservoir by half a turn, relieve overpressure then unscrew cap    
3 Remove covering over engine INSTALLATION IMPORTANTInstallation:  Only install covering over engine after the leak test.  
4 Remove air intake hose (4)    
5 Disconnect electrical connection (1) on coolant temperature sensor (B11/4)    
6 Pull out retaining clamp (2)    
7 Pull coolant temperature sensor (B11/4) out of the connection fitting (3) IMPORTANT Catch coolant with suitable container.
INSTALLATION IMPORTANTInstallation:  Replace seal.
 
8 Install in the reverse order    
9 Pour in coolant and bleed cooling system   AR20.00-P-1142SR
10
REFER TO SELF-DIAGNOSTIC SYSTEMS
Connect diagnostic unit, read out fault memory When replacing the coolant temperature sensor (B11/4). AD00.00-P-2000-06SR
INSPECT Check     
11 Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.
Perform an engine test run and check engine in the area of the coolant temperature sensor (B11/4) for leaktightness
Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A