Power Mirror Control (W/o Memory) (Diagnostics & Symptom Tests): Other Lexus IS III

PRECAUTION [04/2013 - ]

1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Variable Gear Ratio Steering System Refer to «INITIALIZATION [04/2013 - ]»(ref-665529-S01115916402014102400000) Air Conditioning System

Scheme 56

Scheme 57

Scheme 58

Scheme 59

1. ELECTRICAL REMOTE CONTROL MIRROR FUNCTION
2. MIRROR HEATER FUNCTION COMMUNICATION TABLE Sender Receiver Signal Communication Method Air Conditioning Control Assembly Air Conditioning Amplifier Assembly Mirror heater switch (rear window defogger switch) signal LIN

CAUTION / NOTICE / HINT

HINT

1. Use the following procedure to troubleshoot the power mirror control system (w/o Memory).
2. *: Use the Techstream.

PROCEDURE

1. VEHICLE BROUGHT TO WORKSHOP Result Proceed to NEXT Result: 1 NEXT See step 2
2. CUSTOMER PROBLEM ANALYSIS HINT: In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred. Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases. The following 5 items are important points for problem analysis: What Vehicle model, system name When Date, time, occurrence frequency Where Road conditions Under what conditions? Driving conditions, weather conditions How did it happen? Problem symptoms Result Proceed to NEXT Result: 1 NEXT See step 3
3. PRE-CHECK Measure the battery voltage. Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step. Check the fuses and relays. Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc. Result Proceed to NEXT Result: 1 NEXT See step 4
4. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [04/2013 - ]»(ref-665886-S07210108462014102400000) Result Result Proceed to Fault is not listed in problem symptoms table A Fault is listed in problem symptoms table B Result: 2 B See step 6 Result: 1 A See step 5
5. OVERALL ANALYSIS AND TROUBLESHOOTING* Operation Check Refer to «OPERATION CHECK [04/2013 - ]»(ref-665886-S11021393742014102400000) Terminals of ECU Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665886-S30612954462014102400000) Data List/Active Test Refer to «DATA LIST/ACTIVE TEST [04/2013 - ]»(ref-665886-S20733522342014102400000) Inspection Result Proceed to NEXT Result: 1 NEXT See step 6
6. REPAIR OR REPLACE Result Proceed to NEXT Result: 1 NEXT See step 7
7. CONFIRMATION TEST Result Proceed to NEXT Result: 1 NEXT END

TERMINALS OF ECU [04/2013 - ]

1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665880-S31524547612014102400000)
2. CHECK AIR CONDITIONING CONTROL ASSEMBLY Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665880-S31524547612014102400000)

Note. If the battery voltage is low, the power mirror control system (w/o Memory) may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)". Refer to DATA LIST/ACTIVE TEST [04/2013 - ] Inspect the fuses for circuits related to this system before performing the following procedure.

Scheme 60

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Air Conditioner / Active Test. Perform the Active Test according to the display on the Techstream. Body Electrical > Air Conditioner > Active Test Tester Display Measurement Item Control Range Diagnostic Note Defogger Relay (Rear) Mirror Heater OFF or ON - Body Electrical > Air Conditioner > Active Test Tester Display Defogger Relay (Rear) Result Result Proceed to Mirror heater operation on both mirrors is not normal A Mirror heater operation on RH side mirror is not normal B Mirror heater operation on LH side mirror is not normal C Result: 2 B See step 7 Result: 3 C See step 9 Result: 1 A See step 2
2. CHECK WINDOW DEFOGGER SYSTEM Check the window defogger system operation. Refer to «OPERATION CHECK [04/2013 - ]»(ref-665880-S28977650192014102400000) OK The window defogger system operates normally. Result Proceed to OK NG Result: 2 NG GO TO WINDOW DEFOGGER SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665880-S13431012142014102400000) Result: 1 OK See step 3
3. CHECK MIRROR HEATER RELAY Remove the mirror heater relay from the No. 1 engine room relay block and No. 1 junction block assembly. Inspect the mirror heater relay. Refer to «ON-VEHICLE INSPECTION [04/2013 - ]»(ref-665850-S10380159132014102400000) Result Proceed to OK NG Result: 2 NG REPLACE MIRROR HEATER RELAY Result: 1 OK See step 4
4. CHECK HARNESS AND CONNECTOR (MIRROR HEATER RELAY - SEMICONDUCTOR PWR INTEGRATION ECU) Measure the resistance according to the value(s) in the table below. *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Standard Resistance Tester Connection Condition Specified Condition No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 1 - 2C-1(L) Always Below 1 ohms No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 1 - Body ground Always 10 kohms or higher 2C-1(L) - Body ground Always 10 kohms or higher No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 2 - Body ground Always Below 1 ohms Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 5
5. CHECK HARNESS AND CONNECTOR (MIRROR HEATER RELAY POWER SOURCE) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 1 - Body ground Engine switch on (IG), rear defogger switch on 11 to 14 V No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 5 - Body ground Always 11 to 14 V *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 6
6. CHECK HARNESS AND CONNECTOR (MIRROR HEATER RELAY - OUTER MIRROR ACTUATOR ASSEMBLY (DRIVER DOOR/FRONT PASSENGER DOOR) - BODY GROUND) Disconnect the N8 outer mirror actuator assembly (front passenger door) connector. Disconnect the N23 outer mirror actuator assembly (driver door) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 3 - N8-4(+) Always Below 1 ohms No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 3 - N23-4(+) Always Below 1 ohms N8-4(+) - Body ground Always 10 kohms or higher N23-4(+) - Body ground Always 10 kohms or higher No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 3 - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 1 OK USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665529-S21853141262014102400000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR
7. CHECK HARNESS AND CONNECTOR (MIRROR HEATER RELAY - OUTER MIRROR ACTUATOR ASSEMBLY (FRONT PASSENGER DOOR) - BODY GROUND) Remove the mirror heater relay from the No. 1 engine room relay block and No. 1 junction block assembly. *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Disconnect the N8 outer mirror actuator assembly (front passenger door) connector. Disconnect the N23 outer mirror actuator assembly (driver door) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 3 - N8-4(+) Always Below 1 ohms N8-12 (-) - Body Ground Always Below 1 ohms No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 3 - Body Ground Always 10 kohms or higher N8-4 (+) - Body Ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 8
8. INSPECT OUTER MIRROR RH (MIRROR HEATER) Remove the outer mirror RH. Refer to «REMOVAL [04/2013 - ]»(ref-665850-S19367747912014102400000) Inspect the outer mirror RH. Refer to «INSPECTION [04/2013 - ]»(ref-665850-S22598739682014102400000) OK Outer mirror RH is normal. Result Proceed to OK NG Result: 1 OK REPLACE OUTER MIRROR ACTUATOR ASSEMBLY (FRONT PASSENGER DOOR). Refer to «REMOVAL [04/2013 - ]»(ref-665850-S37716490412014102400000) Result: 2 NG REPLACE OUTER MIRROR RH. Refer to «REMOVAL [04/2013 - ]»(ref-665850-S19367747912014102400000)
9. CHECK HARNESS AND CONNECTOR (MIRROR HEATER RELAY - OUTER MIRROR ACTUATOR ASSEMBLY (DRIVER DOOR) - BODY GROUND) Remove the mirror heater relay from the No. 1 engine room relay block and No. 1 junction block assembly. *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly Disconnect the N23 outer mirror actuator assembly (driver door) connector. Disconnect the N8 outer mirror actuator assembly (front passenger door) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 3 - N23-4(+) Always Below 1 ohms N23-12 (-) - Body Ground Always Below 1 ohms No. 1 engine room relay block and No. 1 junction block assembly mirror heater relay terminal 3 - Body Ground Always 10 kohms or higher N23-4 (+) - Body Ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 10
10. INSPECT OUTER MIRROR LH (MIRROR HEATER) Remove the outer mirror LH. Refer to «REMOVAL [04/2013 - ]»(ref-665850-S19367747912014102400000) Inspect the outer mirror LH. Refer to «INSPECTION [04/2013 - ]»(ref-665850-S22598739682014102400000) OK Outer mirror LH is normal. Result Proceed to OK NG Result: 1 OK REPLACE OUTER MIRROR ACTUATOR ASSEMBLY (DRIVER DOOR). Refer to «REMOVAL [04/2013 - ]»(ref-665850-S37716490412014102400000) Result: 2 NG REPLACE OUTER MIRROR LH. Refer to «REMOVAL [04/2013 - ]»(ref-665850-S19367747912014102400000)