Power Door Lock System

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.

Verify customer problem. Perform customer problem analysis check (power door lock control system). See Fig 1.
Inspect communication function of large-scale body multiplex communication system (BEAN). Check that there is no abnormality in the communication system by inspecting the communication function of the body multiplex communication system with the LEXUS hand-held tester. If a communication problem does not exist, go to next step. If a communication problem exists, repair communication problem as necessary. See MULTIPLEX COMMUNICATION SYSTEM article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.

NOTE: Ensure door lock switches are not pressed when performing this step. DTC B1222 will be displayed when master power door lock switch is pressed. The existence of DTC B1222 without any master door lock switch depressed indicates a circuit malfunction. If DTC B1222 is only displayed when a master power door lock switch is pressed the circuit can be considered normal.

Using Lexus hand-held tester, perform the diagnosis trouble code check. If DTC B1222 is NOT displayed without any master door lock switch depressed, go to next step. If DTC B1222 is displayed without any master door lock switch depressed, check driver's side and passenger's side door lock circuits. See POWER DOOR LOCK ACTIVE TEST (DRIVER DOOR) and POWER DOOR LOCK ACTIVE TEST (PASSENGER DOOR) under SYSTEM TESTS.

Determine symptom. Compare symptom to those listed. See POWER DOOR LOCK CONTROL SYSTEM PROBLEM SYMPTOMS table. If symptom does not match any symptom in table, go to next step. If symptom matches any symptom in table, perform appropriate test procedures in order listed under suspected area.

POWER DOOR LOCK CONTROL SYSTEM PROBLEM SYMPTOMS ⁽¹⁾

Symptom

Suspected Area

All Doors Are Not Operated By The Driver's Door Key Cylinder For Interlocked With Key

⁽²⁾⁽³⁾⁽⁴⁾

All Doors Are Not Operated By The Passenger's Door Key Cylinder For Interlocked With Key

⁽⁵⁾⁽³⁾⁽⁴⁾

Only Rear Door (RH) Is Not Operated By Key Cylinder For Interlocked Key

⁽⁶⁾⁽³⁾⁽⁴⁾

Only Rear Door (LH) Is Not Operated By Key Cylinder For Interlocked Key

⁽⁷⁾⁽³⁾⁽⁴⁾

Key Confinement Prevention Function Does Not Work Properly (Manual Operation & Interlocked With Key Are Active)

⁽²⁾⁽³⁾⁽⁸⁾

⁽¹⁾	Perform test procedures in order listed under suspected area.

⁽²⁾	Perform driver's door lock active test. See POWER DOOR LOCK ACTIVE TEST (DRIVER DOOR) under SYSTEM TESTS.

⁽³⁾	Check wiring. See POWER DOOR LOCKS under SYSTEM WIRING DIAGRAMS article in ELECTRICAL.

⁽⁴⁾	Check power window master switch circuit. See POWER WINDOW MASTER SWITCH CIRCUIT under SYSTEM TESTS.

⁽⁵⁾	Perform passenger's door lock active test. See POWER DOOR LOCK ACTIVE TEST (PASSENGER DOOR) under SYSTEM TESTS.

⁽⁶⁾	Perform driver's passenger's side rear door lock active test. See POWER DOOR LOCK ACTIVE TEST (DRIVER REAR DOOR) under SYSTEM TESTS.

⁽⁷⁾	Perform driver's side rear door lock active test. See POWER DOOR LOCK ACTIVE TEST (PASSENGER REAR DOOR) under SYSTEM TESTS.

⁽⁸⁾	Go to DRIVER'S DOOR COURTESY SWITCH CIRCUIT (POWER DOOR LOCK CONTROL SYSTEM) under SYSTEM TESTS.

Perform trouble shooting in the following method, depending on the malfunction symptom.
- Perform pre-check. See POWER DOOR LOCK CONTROL SYSTEM & LUGGAGE COMPARTMENT DOOR OPENER SYSTEM PRE-CHECK under SELF-DIAGNOSTIC SYSTEM. Inspect with hand-held tester (ECU DATA MONITOR) and hand-held tester (ACTIVE TEST).
- Terminal of ECU. See TERMINALS OF ECU (POWER DOOR LOCK CONTROL SYSTEM) under PIN VOLTAGE CHARTS.
- Perform function test. See POWER DOOR LOCK CONTROL SYSTEM under FUNCTION TESTS.

Fig 1: Customer Problem Analysis Check (Power Door Lock Control System)