Description
Light reminder warning does not sound even though headlamp is illuminated.
Diagnosis Procedure
1.CHECK COMBINATION METER INPUT SIGNAL
Select the "Data Monitor" for the "METER/M&A" and check the "BUZZER" monitor value.

Is the inspection result normal? YES >> Replace combination meter. Refer to MWI-82, "Removal and Installation".
NO >> GO TO 2.
2.CHECK FRONT DOOR SWITCH LH SIGNAL CIRCUIT
Check the front door switch LH signal circuit. Refer to DLK-149, "Diagnosis Procedure" (with Intelligent Key system) or DLK-319, "Diagnosis Procedure" (without Intelligent Key system).
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace harness or connector.
3.CHECK FRONT DOOR SWITCH LH
Check the front door switch LH. Refer to DLK-150, "Component Inspection" (with Intelligent Key system) or DLK-320, "Component Inspection" (without Intelligent Key system).
Is the inspection result normal? YES >> Replace the BCM. Refer to BCS-75, "Removal and Installation" (with Intelligent Key system) or BCS-135, "Removal and Installation" (without Intelligent Key system).
NO >> Replace the front door switch LH. Refer to DLK-269, "Removal and Installation" (with Intelligent Key system) or DLK-385, "Removal and Installation" (without Intelligent Key system).
The seat belt reminder warning continues sounding, or
does not sound
The key warning does not sound (without intelligent key)Replacement operations
Description
This section is prepared for technicians who have attained a high level
of skill and experience in repairing
collision-damaged vehicles and also use modern service tools and equipment.
Persons unfamiliar with body
repair techniques should not attempt to repair collision-dam ...
Text messaging
WARNING
Laws in some jurisdictions may restrict
the use of “Text-to-Speech.” Check local
regulations before using the feature.
Laws in some jurisdictions may restrict
the use of some of the applications and
features, such as social networking and
te ...
U1040 ENG comm circuit
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
U1040
ENG COMM CIRCUIT
(Engine communication circuit)
ECM cannot transmit a communication signal to generator.
POSSIBLE CAUSE
Harne ...