1.CHECK FUNCTION

Is the inspection result normal?
YES >> Front door request switch is OK.
NO >> Refer to DLK "Diagnosis Procedure".
Regarding Wiring Diagram information, refer to DLK "INTELLIGENT KEY SYSTEM : Wiring Diagram".
1.CHECK DOOR REQUEST SWITCH INPUT SIGNAL

Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK DOOR REQUEST SWITCH CIRCUIT


Is the inspection result normal?
YES >> Replace BCM. Refer to BCS "Removal and Installation".
NO >> Repair or replace harness.
3.CHECK DOOR REQUEST SWITCH GROUND CIRCUIT
Check continuity between malfunctioning front door request switch harness
connector and ground. 
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness.
4.CHECK DOOR REQUEST SWITCH
Refer to DLK "Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace malfunctioning front door request switch.
5.CHECK INTERMITTENT INCIDENT
Refer to GI "Intermittent Incident".
>> Inspection End.
1.CHECK DOOR REQUEST SWITCH

Is the inspection result normal?
YES >> Inspection End.
NO >> Replace malfunctioning front door request switch.
Thermostat
Exploded View
1. Radiator hose (lower) 2. Water inlet 3. Rubber ring
4. Thermostat A. To radiator
Removal and Installation
WARNING:
Do not remove the radiator cap when the engine is hot. Serious burns
could occur from highpressure
engine coolant escaping from the radiator. Wrap a thick cl ...
Cooling fan control
Cooling fan control : system diagram
Cooling fan control : system description
INPUT/OUTPUT SIGNAL CHART
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed*1
Piston position
Cool ...