Diagnosis System

WINDSHIELD / WINDOWGLASS: POWER WINDOW CONTROL SYSTEM: DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) The power window control system data can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use Techstream to check for malfunctions and perform repairs.

2. CHECK DLC3

(a) The ECU uses ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.









NOTICE:
*: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the door.

If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.

HINT
Connect the cable of Techstream to the DLC3, turn the engine switch on (IG) and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.

* If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.

* If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.

3. CHECK DIAGNOSIS (WITH JAM PROTECTION)

HINT
If there is a malfunction in the pulse sensor, manually operating the power window switch will cause the power window switch light to blink.





(a) Turn the engine switch on (IG).

(b) Manually operate the power window master switch or power window switch on each door.

(c) Check the blinking pattern of the AUTO light as shown in the illustration.





(1) If pattern (A) is displayed, check the wire harness or power window ECU.

(2) If pattern (B) is displayed, check the power window regulator motor or power window ECU.

(3) If the normal pattern is displayed, replace the power window regulator master switch.