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.
Bluetooth Hands-Free Phone System without Navigation System (Type B) (if so
equipped)
WARNING
Use a phone after stopping your vehicle
in a safe location. If you have to use a
phone while driving, exercise extreme
caution at all times so full attention may
be given to vehicle operation.
If you are unable to devote full attention
to vehicle operation while talking on
...
U0100 Lost communication (ECM A)
DTC Logic
DTC DETECTION LOGIC
DTC
Trouble diagnosis name
DTC detection condition
Possible causes
U0100
Lost Communication With
ECM/PCM "A"
When the ignition switch is ON,
TCM is unable to receive the
CAN communications signal
from ECM continuously for 2
...