Power Mirrors: Diagnosis — Lexus GS II рестайлинг (2000-2004)

TROUBLE SHOOTING

Trouble shooting of a power mirror system complaint begins with verification of the customer problem. If problem occurs, go to step 3 . If problem does not occur, go to next step.
If problem does not occur, review conditions under which problem occurred for customer and try to duplicate those conditions. For example, if the problem occurs on rainy days or during high humidity conditions, sprinkle water onto vehicle and see if malfunction occurs. DO NOT sprinkle water directly into engine compartment or onto electronic components. Visually inspect for signs of mechanical and electrical damage. Inspect for blown fuses and damaged relays. Inspect for loose or corroded connections, damaged wiring harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause system malfunction but prove good in a continuity/voltage check with system disconnected. Ensure any aftermarket electronic equipment is properly installed. If fault is found, repair as necessary.
Inspect the multiplex communication system and confirm that there is no trouble by the basic inspection and DTC check. See PRE-CHECK under SELF-DIAGNOSTIC in «MULTIPLEX COMMUNICATION SYSTEM»(ref-152690) article under COMMUNICATION DEVICES in ACCESSORIES & EQUIPMENT.
Determine problem symptom. See «PROBLEM SYMPTOM INDEX»(ref-153072-S18463189612003031200000) table. PROBLEM SYMPTOM INDEX Symptom Suspected Area (1) Electro Chromic Mirror System Electro Chromic Inner Mirror Does Not Operate (2) (3) (4) Electro Chromic Outer Mirror Does Not Operate (2) (5) (3) (4) Power Mirrors W/ Driving Position Memory System Both Right & Left Mirrors Do Not Operate (6) (4) (7) Only One Side Of Mirror Does Not Operate (8) (4) (9) Mirror Does Not Return To Memorized Position (10) (4) (11) Memorized Position Is Moved (10) (4) Power Mirrors W/O Driving Position Memory System Mirror Does Not Operate (6) (4) (7) (9) Mirror Operates Abnormally (6) (12) (4) (7) (9) (1) Perform test procedures in order listed under suspected area. (2) Check the ECU-IG fuse (15-amp). See «COMPONENT LOCATIONS»(ref-153072-S03357646382003031200000) . (3) Check the electro chromic inner mirror. See «ELECTRO CHROMIC INNER MIRROR»(ref-153072-S24043797152003031200000) under COMPONENT TESTS. (4) Check the wire harness. See «WIRING DIAGRAMS»(ref-153072-S40716572252003031200000) . (5) Check the electro chromic outer mirror. See «ELECTRO CHROMIC OUTER MIRROR»(ref-153072-S07398632742003031200000) under COMPONENT TESTS. (6) Check the mirror switch. See «MIRROR SWITCH»(ref-153072-S40905350102003031200000) under COMPONENT TESTS. (7) Check the body ECU No. 2. See «BODY CONTROL SYSTEMS»(ref-152747) article. (8) Check the mirror motor. See «MIRROR MOTOR (W/ DRIVING POSITION MEMORY)»(ref-153072-S03204413492003031200000) under COMPONENT TESTS. (9) Check the driver and passenger door ECUs located in the door panels. See «PIN VOLTAGE TESTS»(ref-153072-S22037378862003031200000) . (10) Check the mirror position sensor (position is not set). See «MIRROR POSITION SENSOR»(ref-153072-S33125434962003031200000) under COMPONENT TESTS. (11) Check the power seat control ECU. See «POWER & HEATED SEATS»(ref-153185) article. (12) Check the mirror motor. See «POWER MIRROR MOTOR (W/O DRIVING POSITION MEMORY)»(ref-153072-S01825688022003031200000) under COMPONENT TESTS.
Inspect the circuits of the power mirrors system. See «CIRCUIT TESTS»(ref-153072-S31193884572003031200000) .
After repairs have been completed, confirm that problem has been eliminated. Operate the system under same conditions recorded for original complaint. If problem is no longer present, repair has corrected problem. If problem is still present, further diagnosis and repair is required.

Scheme 3

Scheme 3: CONNECTOR IDENTIFICATION

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Circuit Description

For driving position memory and return switch circuit (Scheme 8)

Scheme 8

Scheme 8: Circuit Description

Inspection Procedure

Check the memory switch. See «DRIVING POSITION MEMORY & RETURN SWITCH»(ref-153072-S34034316112003031200000) under COMPONENT TESTS. If the results are OK, go to the next step. If the results are not good, replace the memory switch.
Check the wire harness and connector between memory switch and driver door ECU. See «WIRING DIAGRAMS»(ref-153072-S40716572252003031200000) . If the results are OK, check the driver door ECU. See «PIN VOLTAGE TESTS»(ref-153072-S22037378862003031200000) . If the results are not good, repair or replace the wire harness or connector.

Inspect the inner mirror (compass) circuit. Disconnect the connector from the mirror and inspect the connector on the wire harness side. See CONNECTOR IDENTIFICATION and INSPECTING INNER MIRROR (COMPASS) CIRCUIT table. If the circuit is not as specified, inspect the circuits connected to other parts.

Tester Connection	Condition	Specified Condition
4 - Ground	Constant	Continuity
1 - Ground	Ignition Switch LOCK Or ACC	No Voltage
1 - Ground	Ignition Switch ON	B+ Voltage

INSPECTING INNER MIRROR (COMPASS) CIRCUIT

For the driver door power mirror motor circuit (Scheme 9) For the passenger door power mirror motor circuit (Scheme 10)

Scheme 9

Scheme 9: Circuit Description

Scheme 10

Note. If using the hand-held tester, start the inspection from step 1 and if not using the hand-held tester, start from step 2 .

Check the mirror motor using the hand-held tester. Connect the hand-held tester to the DLC3. Check that the mirror motor can operate in an ACTIVE TEST. If the results are OK, check the appropriate door ECU (driver or passenger). See «PIN VOLTAGE TESTS»(ref-153072-S22037378862003031200000) . If the results are not good, go to the next step.
Check the mirror motor. See «POWER MIRROR MOTOR (W/ DRIVING POSITION MEMORY)»(ref-153072-S03204413492003031200000) or «POWER MIRROR MOTOR (W/O DRIVING POSITION MEMORY)»(ref-153072-S01825688022003031200000) under COMPONENT TESTS. If the results are OK, go to the next step. If the results are not good, replace the mirror motor. See «OUTSIDE REAR VIEW MIRROR»(ref-153072-S04101873522003031300000) under REMOVAL & INSTALLATION.
Check the wire harness and connector between the mirror motor and appropriate door ECU (driver or passenger). See «WIRING DIAGRAMS»(ref-153072-S40716572252003031200000) . If the results are OK, check the appropriate door ECU (driver or passenger). See «PIN VOLTAGE TESTS»(ref-153072-S22037378862003031200000) . If the results are not good, repair or replace the wire harness or connector.

This position is detected by the mirror position sensor and will be memorized in the seat ECU located under the driver seat. This sensor is equipped in the mirror in spite of the existence of the memory function. For the driver door power mirror position sensor circuit (Scheme 9) For the passenger door power mirror position sensor circuit (Scheme 10)