Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus ES 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Using DTC B1222, which is a code when any of the master switches are constantly turned on, the switch operation can be monitored. If there is an output of DTC B1222 only when the switch is operated, the switch circuit can be considered normal.

Using scan tool, check that DTC B1222 is output when the switch is operated. See Fig 1. If the results are normal, go to next step. If the results are abnormal, perform driver's door lock motor circuit test. See POWER DOOR LOCK MOTOR CIRCUIT (DRIVER DOOR) .

NOTE: During active test, the hand-held tester sends a signal to the body ECU to drive the power door lock motor. If the power door lock operates, the power door lock motor itself and the wire harness between the power door lock and body ECU are considered normal.

NOTE: Data monitor displays, on the scan tool, the switch condition judged by the body ECU. If the display changes according to the actual switch operation, the switch itself and the wire harness between the switch and body ECU are considered normal.

Using scan tool, select the active test and check that the power door lock operates. See BODY ECU ACTIVE TEST (DRIVER DOOR) table. Using scan tool, perform a data monitor of the body ECU. See BODY ECU DATA MONITOR TEST (DRIVER DOOR) table. If both active test and data monitor results are correct, problem is intermittent. If any portion of active test or data monitor fails, perform appropriate procedure. See POWER DOOR LOCK ACTIVE TEST JUDGEMENT (DRIVER DOOR) table.

BODY ECU ACTIVE TEST (DRIVER DOOR)

Item	Motor
Door Lock	LOCK/UNLOCK

BODY ECU DATA MONITOR TEST (DRIVER DOOR)

Item	Inspecting Condition	Standard Value
KEY SW	IG ON/Without Key	ON/OFF
Lock Position Switch	Unlocked/Locked	ON/OFF
Courtesy Switch	Door Open/Closed	ON/OFF

POWER DOOR LOCK ACTIVE TEST JUDGEMENT (DRIVER DOOR)

Active Test

Data Monitor

Perform Test

No Good

Okay

⁽¹⁾

Okay

KEY SW NG

⁽²⁾

Okay

Lock Position Switch NG

⁽¹⁾

Okay

Courtesy Switch NG

⁽³⁾

⁽¹⁾	Perform driver's door lock motor circuit test. See POWER DOOR LOCK MOTOR CIRCUIT (DRIVER DOOR) .

⁽²⁾	Perform unlock warning switch circuit test. See UNLOCK WARNING SWITCH CIRCUIT (POWER DOOR LOCK SYSTEM) .

⁽³⁾	Perform driver's door courtesy switch circuit test. See DRIVER'S DOOR COURTESY SWITCH CIRCUIT (POWER DOOR LOCK CONTROL SYSTEM) .

Fig 1: Identifying Body ECU Condition (Door Lock Switch)