Power Mirror Control System (Diagnostics): Diagnosis Lexus IS II facelift

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use the following procedure to troubleshoot the power mirror control system.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
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 in the problem analysis: What Vehicle model, system name When Date, time, occurrence frequency Where Road conditions Under what conditions? Running conditions, driving conditions, weather conditions How did it happen? Problem symptoms NEXT: Go to next step
3. INSPECT 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. NEXT: Go to next step
4. CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM* Use the Techstream to check if the multiplex communication system is functioning normally. Result Result Proceed to MPX DTC is not output A MPX DTC is output B B --> Go to «MULTIPLEX COMMUNICATION SYSTEM»(ref-387486-S21448970252011022400000) . Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-387386-S38489328662011022400000) OK: Go to next step
5. CHECK COMMUNICATION FUNCTION OF «CAN COMMUNICATION SYSTEM»(ref-387391-S03462946972011022400000) Use the Techstream to check if the CAN communication system is functioning normally. Result Result Proceed to CAN DTC is not output A CAN DTC is output B B --> Go to «CAN COMMUNICATION SYSTEM»(ref-387391-S03462946972011022400000) . Refer to «DIAGNOSIS SYSTEM»(ref-387391-S05169532582011022400000) A: Go to next step
6. PROBLEM SYMPTOMS TABLE Refer to «PROBLEM SYMPTOMS TABLE»(ref-387478-S14073026742011022400000) . Result Result Proceed to Fault is not listed in Problem Symptoms Table A Fault is listed in Problem Symptoms Table B B --> Go to step 7 A: Go to next step
7. OVERALL ANALYSIS AND TROUBLESHOOTING* On-vehicle Inspection . Refer to «ON-VEHICLE INSPECTION»(ref-387478-S02098892502011022400000) Data List / Active Test . Refer to «DATA LIST / ACTIVE TEST»(ref-387478-S06319808422011022400000) Terminals of ECU . Refer to «TERMINALS OF ECU»(ref-387478-S06410246482011022400000) NEXT: Go to next step
8. REPAIR OR REPLACE NEXT: Go to next step
9. CONFIRMATION TEST NEXT --> END

PROBLEM SYMPTOMS TABLE

HINT

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

POWER MIRROR CONTROL SYSTEM

Scheme 62

Scheme 63

1. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER SIDE) Disconnect the M10 connector. Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Standard Voltage Tester Connection Wiring Color Terminal Description Condition Specified Condition M10-3 (SIG) - Body ground B - Body ground Ignition power supply Engine switch off --> on (IG) 0 V --> 11 to 14 V M10-4 (CPUB) - Body ground G - Body ground +B power supply Always 11 to 14 V M10-6 (BDR) - Body ground L - Body ground +B power supply Always 11 to 14 V Standard Resistance Tester Connection Wiring Color Terminal Description Condition Specified Condition M10-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the M10 connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Wiring Color Terminal Description Condition Specified Condition h1-1 (DMVR) - Body ground W - Body ground Outer mirror switch signal (Up or Right) Engine switch on (IG), Left/Right adjustment switch L side, Mirror switch OFF--> UP or RIGHT 0 V --> 11 to 14 V h1-5 (DVC) - Body ground SB - Body ground Power source for mirror position sensor Engine switch off --> on (IG) 0 V --> 0 to 5 V h1-6 (VSSR) - Body ground V - Body ground Vertical direction position signal Engine switch on (IG), Left/Right adjustment switch L side, Mirror switch uppermost position --> lowermost position 0 V --> 1 to 3 V h1-9 (DMHR) - Body ground R - Body ground Outer mirror switch signal (Left or Down) Engine switch on (IG), Left/Right adjustment switch L side, Mirror switch OFF--> LEFT or DOWN 0 V --> 11 to 14 V h1-10 (DM+R) - Body ground B - Body ground Outer mirror switch signal (Right or Down) Engine switch on (IG), Left/Right adjustment switch L side, Mirror switch OFF--> RIGHT or DOWN 0 V --> 11 to 14 V h1-13 (HSSR) - Body ground LG - Body ground Horizontal direction position signal Engine switch on (IG), Left/Right adjustment switch L side, Mirror switch innermost position --> outermost position 0 V --> 1 to 3 V
2. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY (PASSENGER SIDE) Disconnect the L10 connector. Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Standard Voltage Tester Connection Wiring Color Terminal Description Condition Specified Condition L10-3 (SIG) - Body ground B - Body ground Ignition power supply Engine switch off --> on (IG) 0 V --> 11 to 14 V L10-4 (CPUB) - Body ground G - Body ground +B power supply Always 11 to 14 V L10-6 (BDR) - Body ground L - Body ground +B power supply Always 11 to 14 V Standard Resistance Tester Connection) Wiring Color Terminal Description Condition Specified Condition L10-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the L10 connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Wiring Color Terminal Description Condition Specified Condition g1-1 (PMVR) - Body ground W - Body ground Outer mirror switch signal (Up or Right) Engine switch on (IG), Left/Right adjustment switch R side, Mirror switch OFF--> UP or RIGHT 0 V --> 11 to 14 V g1-5 (PVC) - Body ground SB - Body ground Power source for mirror position sensor Engine switch off --> on (IG) 0 V --> 0 to 5 V g-6 (VSSR) - Body ground V - Body ground Vertical direction position signal Engine switch on (IG), Left/Right adjustment switch R side, Mirror switch uppermost position --> lowermost position 0 V --> 1 to 3V g1-9 (PMHR) - Body ground R - Body ground Outer mirror switch signal (Left or Down) Engine switch on (IG), Left/Right adjustment switch R side, Mirror switch OFF--> LEFT or DOWN 0 V --> 11 to 14 V g1-10 (PM+R) - Body ground B - Body ground Outer mirror switch signal (Right or Down) Engine switch on (IG), Left/Right adjustment switch R side, Mirror switch OFF--> RIGHT or DOWN 0 V --> 11 to 14 V g1-13 (HSSR) - Body ground LG - Body ground Horizontal direction position signal Engine switch on (IG), Left/Right adjustment switch R side, Mirror switch innermost position --> outermost position 0 V --> 1 to 3 V

Scheme 64

1. DESCRIPTION Data of the system can be read from the Data Link Connector 3 (DLC3) of the vehicle. Therefore, when the system seems to be malfunctioning, use Techstream to check for a malfunction and repair it.
2. CHECK DLC3 The vehicle's ECM uses ISO 9141-2 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format. Standard Tester Connection Condition Specified Condition 7 (Bus + line) - 5 (Signal ground) During communication Pulse generation 4 (Chassis ground) - Body ground Constant Below 1 ohms 5 (Signal ground) - Body ground Constant Below 1 ohms 16 (B+) - Body ground Constant 9 to 14 V HINT: If the screen displays a communication error message after you have connected the cable of Techstream to the DLC3, turned the engine switch on (IG) and used Techstream, the problem may be on the vehicle side or tester side. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle. If communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself, so consult the Service Department listed in the tester's instruction manual.

DATA LIST / ACTIVE TEST

1. USING TECHSTREAM Connect the Techstream to the DLC3. Monitor the ECU data by following the prompts on the tester screen. HINT: The Techstream has a "Snapshot" function which records the monitored data. Refer to the Techstream operator's manual for further details.
2. DATA LIST HINT: Using the Data List displayed on the Techstream, the value of the switch, sensor, actuator, etc. can be read without part removal. Reading the Data List as the first step of troubleshooting is one way to shorten labor time. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Read the Data List according to the display on the Techstream. Mirror L / Mirror R Tester Display Measurement Item/Range Normal Condition Diagnostic Note Mir Position Sensor (V) Vertical mirror position/MIN: 0, MAX 4.98 V Within range from 0 to 4.98 V - Mir Position Sensor (H) Horizontal mirror position/MIN: 0, MAX 4.98 V Within range from 0 to 4.98 V - Mirror Memory No. 1 Mirror position memorized in memory switch M1/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized - Mirror Memory No. 2 Mirror position memorized in memory switch M2/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized - Mirror Memory No. 3 Mirror position memorized in memory switch M3/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized - Driver Seat / Passenger Seat Tester Display Measurement Item/Range Normal Condition Diagnostic Note KSW Switch Key unlock warning switch signal/ON or OFF ON: Key is in door key cylinder OFF: Key is not in door key cylinder - Ignition switch Engine switch status/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off - SET Switch Seat memory set switch signal/ON or OFF ON: Memory set switch is ON OFF: Memory set switch is OFF - M1 Switch Seat memory switch M1 signal/ON or OFF ON: Seat memory switch M1 is ON OFF: Seat memory switch M1 is OFF - M2 Switch Seat memory switch M2 signal/ON or OFF ON: Seat memory switch M2 is ON OFF: Seat memory switch M2 is OFF - M3 Switch Seat memory switch M3 signal/ON or OFF ON: Seat memory switch M3 is ON OFF: Seat memory switch M3 is OFF - P Switch Park/Neutral position switch signal/ON or OFF ON: Shift in P position OFF: Shift in any position except neutral - Power Voltage Power supply for position control ECU & switch/MIN: 0 V, MAX: 19.89 V Within range from 11 to 14 V - Memory No1 Driving position memorized in seat memory switch M1/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized - Memory No2 Driving position memorized in seat memory switch M2/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized - Memory No3 Driving position memorized in seat memory switch M3/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized - Body Tester Display Measurement Item/Range Normal Condition Diagnostic Note Mirror Selection SW (R) Mirror selection switch signal for RH mirror/ON or OFF ON: Switch is in Right position OFF: Switch is in neutral or Left position - Mirror Selection SW (L) Mirror selection switch signal for LH mirror/ON or OFF ON: Switch is in Left position OFF: Switch is in neutral or Right position - Mirror Position SW (R) Mirror position switch signal (Right)/ON or OFF ON: Switch R is ON OFF: Any switch except R is ON or all switches are OFF - Mirror Position SW (L) Mirror position switch signal (Left)/ON or OFF ON: Switch L is ON OFF: Any switch except L is ON or all switches are OFF - Mirror Position SW (Up) Mirror position switch signal (Up)/ON or OFF ON: Switch UP is ON OFF: Any switch except UP is ON or all switches are OFF - Mirror Position SW (Dwn) Mirror position switch signal (Down)/ON or OFF ON: Switch DOWN is ON OFF: Any switch except DOWN is ON or all switches are OFF
3. ACTIVE TEST HINT: Performing the Active Test using the Techstream allows the relay, VSV, actuator, etc. to be operated without part removal. Performing the Active Test as the first step of troubleshooting is one way to shorten labor time. It is possible to display the Data List during the Active Test. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Perform the Active Test according to the display on the Techstream. Mirror L / Mirror R Tester Display Test Part Control Range Diagnostic Note Mirr Up/Down Mirror vertical operation Up / Down - Mirr Right/Left Mirror horizontal operation Right / Left - Air Conditioner Tester Display Test Part Control Range Diagnostic Note Mirr Heater Mirror heater operation OFF/ON

ON-VEHICLE INSPECTION

1. CHECK POWER MIRROR SWITCH OPERATION Remote control The mirror adjust switch can control the adjustment axis of the mirror surface. Reverse-linked This function tilts the mirror surface downward to improve the visibility when driving in reverse, provided that all the conditions given below have been met. Engine switch is on (IG). Shift lever is moved to "R".
2. CHECK MEMORY SWITCH OPERATION Memory Memorizes the positions when all conditions below have been met and the M1, M2 or M3 button is pushed while the SET switch is pushed or M1, M2 or M3 switch is pressed within 3 seconds after the SET switch is released. Engine switch is on (IG). When the memory setting is completed, the buzzer will sound for 0.5 seconds. Recall If the button M1, M2 or M3 is pressed when all conditions below have been met, it recalls the positions. Engine switch is on (IG). Shift position is "P" (A/T models). Vehicle speed is 3 km (1.9 mph) or less (M/T models). Parking brake lever is pulled (M/T models). If the button M1, M2 or M3 is pressed when all conditions below have been met and within 30 seconds, it recalls the positions. Engine switch is on (IG). Driver door is opened.

INSPECTION PROCEDURE

Note. The power mirror control system is a part of the multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See MULTIPLEX COMMUNICATION SYSTEM . Refer to HOW TO PROCEED WITH TROUBLESHOOTING ). The mirror heater operation is liked with the defogger system or wiper and washer system. Confirm that these systems are operating normally before starting the inspection.

Scheme 65

Scheme 66

Scheme 67

Scheme 68

1. CHECK MULTIPLEX COMMUNICATION SYSTEM NG --> See step 12 OK: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Enter the following menus: Body Electrical / Air Conditioner / Active Test. Perform an Active Test according to the display on the tester. Tester Display Test Part Control Range Diagnostic Note Mirror Heater Mirror heater operation OFF / ON - OK Mirrors become warm. NG --> See step 5 OK: Go to next step
3. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Replace the air conditioning amplifier assembly . Refer to «REMOVAL»(ref-387355-S39716416222011022400000) NEXT: Go to next step
4. CONFIRM MIRROR HEATER OPERATION Turn the engine switch on (IG). Check mirror heater operation. Result Result Proceed to Mirrors become warm A Mirrors do not operate linked with automatic wiper B Mirrors do not operate linked with windshield wiper switch assembly C C --> See step 14 B --> See step 13 A --> END (AIR CONDITIONING AMPLIFIER ASSEMBLY WAS DEFECTIVE)
5. PERFORM ACTIVE TEST USING TECHSTREAM Select the Active Test, use the Techstream to issue a control command, and then check heater mirror relay operation. Check that operation sound of the heater mirror relay can be heard. OK Operation sound of the heater mirror relay can be heard. NG --> See step 9 OK: Go to next step
6. INSPECT HEATER MIRROR RELAY Remove the heater mirror relay. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 ohms 3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kohms or higher NG --> REPLACE HEATER MIRROR RELAY OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (HEATER MIRROR RELAY - BATTERY) Measure the voltage according to the table below. Standard Voltage Tester Connection Condition Specified Condition Relay block terminal 5 - Body ground Always 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATER MIRROR RELAY - BATTERY) OK: Go to next step
8. CHECK HARNESS AND CONNECTOR (HEATER MIRROR RELAY - OUTER REAR VIEW MIRROR) Disconnect the L14 and M15 connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Outer Rear View Mirror Assembly LH Outer Rear View Mirror Assembly RH Tester Connection Condition Specified Condition Relay block terminal 3 - M15-3 (+) Always Below 1 ohms Relay block terminal 3 - Body ground Always 10 kohms or higher M15-9 (-) - Body ground Always Below 1 ohms Tester Connection Condition Specified Condition Relay block terminal 3 - L14-3 (+) Always Below 1 ohms Relay block terminal 3 - Body ground Always 10 kohms or higher L14-9 (-) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATER MIRROR RELAY - OUTER REAR VIEW MIRROR ASSEMBLY) OK --> See step 15
9. INSPECT HEATER MIRROR RELAY Remove the heater mirror relay. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 ohms 3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kohms or higher NG --> REPLACE HEATER MIRROR RELAY OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (HEATER MIRROR RELAY - BATTERY) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition Relay block terminal 1 - Body ground Engine switch on (IG) 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATER MIRROR RELAY - BATTERY) OK: Go to next step
11. CHECK HARNESS AND CONNECTOR (HEATER MIRROR RELAY - A/C AMPLIFIER ASSEMBLY) Disconnect the J58 connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Relay block terminal 2 - J58-2 (MHTR) Always Below 1 ohms Relay block terminal 2 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (HEATER MIRROR RELAY - A/C AMPLIFIER ASSEMBLY) OK --> See step 16
12. GO TO «MULTIPLEX COMMUNICATION SYSTEM»(ref-387486-S21448970252011022400000) . Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-387386-S38489328662011022400000)
13. REPLACE RAIN SENSOR. Refer to «REMOVAL»(ref-387356-S17194416322011022400000)
14. REPAIR WINDSHIELD WIPER SWITCH ASSEMBLY. Refer to «REMOVAL»(ref-387356-S30377463142011022400000)
15. REPLACE OUTER REAR VIEW MIRROR ASSEMBLY. Refer to «REMOVAL»(ref-387455-S03039540952011022400000)
16. REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to «REMOVAL»(ref-387355-S39716416222011022400000)