Power Window Control System - Power Window Master Switch Power Source Circuit

Lexus IS250 IS220d GSE20 ALE20 - WINDSHIELD / WINDOWGLASS

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS (MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND)

POWER WINDOW CONTROL SYSTEM - Power Window Master Switch Power Source Circuit

DESCRIPTION

This circuit supplies power to operate the multiplex network master switch.


WIRING DIAGRAM

Power Window Control System - Power Window Master Switch Power Source Circuit. WINDSHIELD / WINDOWGLASS. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND)
Power Window Control System - Power Window Master Switch Power Source Circuit. WINDSHIELD / WINDOWGLASS. Lexus IS250 IS220d GSE20 ALE20

Disconnect the M7 (*L17) connector.

Measure the voltage and resistance according to the value(s) in the table below.


(* ): RHD models

  • Voltage:
  • Tester ConnectionConditionSpecified Condition
    9 (CPUB) - Body groundAlways10 to 14 V
    10 (BDR) - Body groundAlways10 to 14 V
    20 (SIG) - Body groundEngine switch on (IG)10 to 14 V
  • Resistance:
  • Tester ConnectionConditionSpecified Condition
    2 (GND) - Body groundAlwaysBelow 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE