Description
Transmits a key switch signal to the BCM.
Component Function Check
1. CHECK BCM INPUT SIGNAL
Select "Data Monitor" for "BCM" and check the "KEY ON SW" monitor value.

Is the inspection result normal? YES >> Inspection End.
NO >> Refer to WCS-47, "Diagnosis Procedure".
Diagnosis Procedure
Regarding Wiring Diagram information, refer to WCS-29, "Wiring Diagram".
1. CHECK BCM INPUT SIGNAL
Check voltage between BCM harness connector M19 terminal 81 and ground.

Is the inspection result normal? YES >> Inspection End.
NO >> GO TO 2.
2. CHECK KEY SWITCH CIRCUIT


Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace harness or connector.
3. CHECK KEY SWITCH POWER SUPPLY CIRCUIT
Check voltage between key switch harness connector M105 terminal 1 and ground.

Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace harness or connector.
4. CHECK KEY SWITCH GROUND CIRCUIT
Check continuity between key switch harness connector M105 terminal 2 and ground.

Is the inspection result normal? YES >> Replace key switch.
NO >> Repair or replace harness or connector.
Component Inspection
1. CHECK KEY SWITCH

Is the inspection result normal? YES >> Inspection End.
NO >> Replace key switch.
Parking brake switch signal circuitP0506 ISC system
Description
The ECM controls the engine idle speed to a specified level through the fine
adjustment of the air, which is let
into the intake manifold, by operating the electric throttle control actuator.
The operating of the throttle valve is
varied to allow for optimum control of the engine ...
Automatic Anti-glare rearview mirror
(if so equipped)
Automatic Anti-glare rearview mirror
(if so equipped)
The inside mirror is designed so that it automatically
dims during night time conditions and according
to the intensity of the headlights of the
vehicle following you. The automatic anti-glare
feature is activated when the ignition swit ...
P0127 IAT sensor
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0127
IAT SENSOR-B1
(Intake air temperature too high)
Rationally incorrect voltage from the sensor is sent to ECM,
compared with
the voltage ...