Electrical Load Signal

ELECTRICAL LOAD SIGNAL

Description

The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via the CAN communication line from BCM to ECM via the IPDM E/R.


Component Function Check


1. CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

1.Turn ignition switch ON.
2.Connect CONSULT and select "DATA MONITOR" mode.
3.Select "LOAD SIGNAL" and check indication under the following conditions.





Is the inspection result normal?
YES- GO TO 2.
NO- Go to .

2. CHECK LIGHTING SWITCH FUNCTION

Check "LOAD SIGNAL" indication under the following conditions.





Is the inspection result normal?
YES- GO TO 3.
NO- Go to .

3. CHECK HEATER FAN CONTROL SWITCH FUNCTION

Select "HEATER FAN SW" and check indication under the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- Go to .


Diagnosis Procedure


1. INSPECTION START

Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). .
Which circuit is related to the incident?
Rear window defogger-GO TO 2.
Headlamp-GO TO 3.
Heater fan-GO TO 4.

2. CHECK REAR WINDOW DEFOGGER SYSTEM

Work Flow.
- INSPECTION END

3. CHECK HEADLAMP SYSTEM

Xenon Type (XENON TYPE) or Halogen Type (HALOGEN TYPE).
- INSPECTION END

4. CHECK HEATER FAN CONTROL SYSTEM

With Color Display (with color display) or "WITH MONOCHROME DISPLAY : How to Perform Trouble Diagnosis
For Quick And Accurate Repair" (with monochrome display).
- INSPECTION END