Description

Main power window and door lock/unlock switch, power window and door lock/unlock switch RH and BCM transmit and receive the signal by power window serial link.

The signal mentioned below is transmitted from BCM to main power window and door lock/unlock switch and power window and door lock/unlock switch RH

• Keyless power window down signal

The signal mentioned below is transmitted from main power window and door lock/unlock switch to power window and door lock/unlock switch RH

• Front door window RH operation signal

• Power window control by key cylinder switch signal

• Power window lock switch signal

• Retained power operation signal

Component Function Check

1. CHECK POWER WINDOW SWITCH OUTPUT SIGNAL

Check (“CDL LOCK SW ”, “CDL UNLOCK SW”) in “DATA MONITOR” mode for “POWER DOOR LOCK SYSTEM” with CONSULT-III. Refer to BCS-19, "DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)".

Is the inspection result normal? YES >> Power window serial link is OK.

NO >> Refer to PWC-331, "POWER WINDOW MAIN SWITCH : Diagnosis Procedure".

Diagnosis Procedure

Power Window Serial Link Check

1. CHECK POWER WINDOW SWITCH OUTPUT SIGNAL

1. Remove Intelligent Key, and close front door LH and RH.

2. Check signal between BCM connector and ground with oscilloscope when door lock and unlock switch (LH and RH) is turned to “LOCK” or “UNLOCK”.

3. Check that signals which are shown in the figure below can be detected during 10 second just after door lock and unlock switch (LH and RH) is turned to “LOCK” or “UNLOCK”.

Is the inspection result normal? YES >> Power window serial link is OK.

NO >> GO TO 2

2. CHECK POWER WINDOW SERIAL LINK CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM and main power window and door lock/unlock switch.

3. Check continuity between BCM connector (A) and main power window and door lock/unlock switch connector (B).

4. Check continuity between BCM connector (A) and ground.

Is the inspection result normal? YES >> Replace main power window and door lock/unlock switch. Refer to PWC-411, "Removal and Installation". After that, refer to PWC-307, "POWER WINDOW MAIN SWITCH : Special Repair Requirement".

NO >> Repair or replace harness.