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Lighting (Interior) (Diagnostics): Overview Lexus HS I

Interior/illumination Lights 27 illustrations ~4765 words

Scheme 3

Scheme 3: ILLUSTRATION
Scheme 3: ILLUSTRATION

Scheme 4

Scheme 4: ILLUSTRATION
Scheme 4: ILLUSTRATION

Scheme 5

Scheme 5: ILLUSTRATION
Scheme 5: ILLUSTRATION

Scheme 6

Scheme 6: SYSTEM DIAGRAM
Scheme 6: SYSTEM DIAGRAM
  1. ILLUMINATED ENTRY SYSTEM

SYSTEM DESCRIPTION

  1. ILLUMINATED ENTRY SYSTEM The illuminated entry system has the following control functions: Control Outline Lights that Operate Actuation Area-linked When a registered key enters any actuation area around the doors, the lights that operate turn on. Power Switch Illumination Front Interior Lights Rear Interior Light Footwell Lights Scuff Plate Lights When a registered key leaves all of actuation areas around the doors, the lights that operate turn off. Power Switch Illumination Front Interior Lights Rear Interior Light Footwell Lights Scuff Plate Lights Door Lock/Unlock-linked When any door is unlocked, the lights that operate turn on. Power Switch Illumination Front Interior Lights Rear Interior Light Footwell Lights Scuff Plate Lights When all doors are locked, the lights that operate turn off. Power Switch Illumination Front Interior Lights Rear Interior Light Footwell Lights Scuff Plate Lights Door Open/Close-linked When any door is opened, the lights that operate turn on. Power Switch Illumination Front Interior Lights Rear Interior Light Footwell Lights Scuff Plate Lights Door Courtesy Lights When all doors are closed, the lights that operate turn off. Power Switch-linked When the power switch is turned from on (ACC or IG) to off, the lights that operate turn on. Power Switch Illumination Front Interior Lights Rear Interior Light Scuff Plate Lights When the power switch is turned from off to on (ACC or IG) the lights that operate turn off. Power Switch Illumination Front Interior Lights Rear Interior Light Scuff Plate Lights When the power switch is turned from off to on (IG) the lights that operate turn on. Footwell Lights Delay When approximately 15 seconds elapse after any of the following conditions is met, the lights that operate turn off: An actuation area-linked function is used. The door unlock-linked function is active. Any door is opened and then all doors are closed when the power switch is off. Power Switch Illumination Front Interior Lights Rear Interior Light Scuff Plate Lights Footwell Lights Battery Saving When no changes occur in the condition of the doors for 20 minutes and a key is not in the actuation area, the lights that operate turn off. Power Switch Illumination Front Interior Lights Rear Interior Light Scuff Plate Lights Footwell Lights

OPERATION CHECK

  1. INSPECT INTERIOR LIGHT CONTROL OPERATION NOTE: Perform this inspection with the customize parameters at the initial settings. HINT: The interior light control illuminates the lights below. Power Switch Illumination Front Interior Lights Rear Interior Light Scuff Plate Lights The operation and conditions of this control are described below. Operation Condition Fade in and illuminate constantly Any door is opened when all doors are closed. Illuminate for 15 seconds, and then fade out When any of the following conditions is met, the lights illuminate for 15 seconds, and then fade out: The key enters any actuation area around the doors when the power switch is off and all doors are closed*1. Any door is unlocked when the power switch is off with all doors closed and locked. The power switch is turned from on (IG) to off when all doors are closed. All doors are closed after any door is opened and the power switch is off. Fade out immediately When any of the following conditions is met, the lights fade out immediately: The power switch is turned from off to on (ACC) when all doors are closed. All doors are locked when the power switch is off, all doors are closed and any door is unlocked. All doors are locked again when all doors are already closed and locked. Battery saving When no changes occur in the condition of the doors for 20 minutes and a key is not in the actuation area, the lights that operate turn off. HINT: *1: When the lights are on, if the key leaves all of actuation areas around the doors, after approximately 3 seconds, the lights fade out.
  2. INSPECT FOOTWELL LIGHT CONTROL OPERATION NOTE: Perform this inspection with the customize parameters at the initial settings. HINT: The footwell light control illuminates the lights below. Footwell light LH Footwell light RH The operation and conditions of this control are described below. Operation Condition Fade in and illuminate constantly When either of the following conditions is met, the footwell light LH and footwell light RH fade in: Any door is opened when all doors are closed. The power switch is turned from off to on (IG). Illuminate for 15 seconds, and then fade out When any of the following conditions is met, the footwell light LH and foot light RH illuminate for 15 seconds and then fade out: Any door is unlocked when the power switch is off, all doors are closed and all doors are locked. The power switch is turned from on (IG) to off when all doors are closed. All doors are closed when any door is opened and the power switch is off. Fade out immediately All doors are locked when the power switch is off, all doors are closed and any door is unlocked.
  3. INSPECT CENTER CONSOLE SPOT LIGHT CONTROL OPERATION NOTE: Perform this inspection with the customize parameters at the initial settings. HINT: The center console spot light control illuminates the light below. Center console spot light The operation and conditions of this control are described below. Operation Condition Fade in When either of the following conditions is met, the center console spot light fades in. The power switch is on (ACC). The power switch is on (IG). Fade out The power switch is off.

DESCRIPTION

This circuit detects the power switch on (IG) or off condition, and sends it to the main body ECU (multiplex network body ECU).

Scheme 7

Scheme 7: WIRING DIAGRAM
Scheme 7: WIRING DIAGRAM

This circuit detects the power switch on (ACC) or off condition, and sends it to the main body ECU (multiplex network body ECU).

Scheme 8

Scheme 8: WIRING DIAGRAM
Scheme 8: WIRING DIAGRAM

The main body ECU (multiplex network body ECU) detects the condition of each door courtesy light switch.

Scheme 9

Scheme 9: WIRING DIAGRAM
Scheme 9: WIRING DIAGRAM

Scheme 10

Scheme 10: PROCEDURE
Scheme 10: PROCEDURE

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note RR Door Courtesy SW Rear door courtesy light switch RH signal/ON or OFF ON: Rear door RH open OFF: Rear door RH closed - RL Door Courtesy SW Rear door courtesy light switch LH signal/ON or OFF ON: Rear door LH open OFF: Rear door LH closed - FR Door Courtesy Front door RH condition signal/ON or OFF ON: Front door RH closed OFF: Front door RH open - FL Door Courtesy Front door LH condition signal/ON or OFF ON: Front door LH closed OFF: Front door LH open - Luggage Courtesy SW Luggage compartment door courtesy light switch signal/ON or OFF ON: Luggage compartment door open OFF: Luggage compartment door closed - OK Normal conditions listed above are displayed. Result Result Proceed to OK A Front door courtesy light switch LH or RH does not operate B Rear door courtesy light switch LH or RH does not operate C Luggage compartment door courtesy light switch does not operate D D --> See step 7 C --> See step 5 B --> See step 2 A --> See step 12
  2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH) Remove the front door courtesy light switch assembly. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 - Switch body Pushed 10 kohms or higher 1 - Switch body Not pushed Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Front Door Courtesy Light Switch Assembly) *2 Switch Body NG --> See step 9 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - SWITCH) for Front LH Disconnect the 2B instrument panel junction block assembly connector. Disconnect the L10 front door courtesy light switch assembly LH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-13 - L10-1 Always Below 1 ohms 2B-13 - Body ground Always 10 kohms or higher for Front RH Disconnect the 2B instrument panel junction block assembly connector. Disconnect the M10 front door courtesy light switch assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-31 - M10-1 Always Below 1 ohms 2B-31 - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for Front LH Remove the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-13 - A-2 (FLCY) Always Below 1 ohms 2B-13 - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument Panel Junction Block Assembly) for Front RH Remove the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-31 - A-4 (FRCY) Always Below 1 ohms 2B-31 - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument Panel Junction Block Assembly) NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK --> See step 13
  5. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH) Remove the rear door courtesy light switch assembly. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 - Switch body Pushed 10 kohms or higher 1 - Switch body Not pushed Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Rear Door Courtesy Light Switch Assembly) *2 Switch Body NG --> See step 10 OK: Go to next step
  6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - REAR COURTESY LIGHT SWITCH) for Rear LH Disconnect the F8 main body ECU (multiplex network body ECU) connector. Disconnect the L12 rear door courtesy light switch assembly LH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F8-3 (LCTY) - L12-1 Always Below 1 ohms F8-3 (LCTY) - Body ground Always 10 kohms or higher for Rear RH Disconnect the F9 main body ECU (multiplex network body ECU) connector. Disconnect the M12 rear door courtesy light switch assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F9-6 (RCTY) - M12-1 Always Below 1 ohms F9-6 (RCTY) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
  7. INSPECT LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY Remove the luggage compartment door lock assembly. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 2 (E) - 3 (D+) Locked 10 kohms or higher Unlocked Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Luggage Compartment Door Lock Assembly) *2 Lock *3 Unlock NG --> See step 11 OK: Go to next step
  8. CHECK HARNESS AND CONNECTOR (LUGGAGE COMPARTMENT DOOR LOCK - MAIN BODY ECU) Disconnect the F9 main body ECU (multiplex network body ECU) connector. Disconnect the L34 luggage compartment door lock assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F9-19 (LGCY) - L34-3 (D+) Always Below 1 ohms F9-19 (LGCY) - Body ground Always 10 kohms or higher L34-2 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
  9. REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information)
  10. REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information)
  11. REPLACE LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information)
  12. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398302-S25787969952011051600000)
  13. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/body-electrical/#power-distribution-service-information)

The main body ECU (multiplex network body ECU) controls the front interior lights, rear interior light and scuff plate lights.

Scheme 14

Scheme 14: WIRING DIAGRAM
Scheme 14: WIRING DIAGRAM

Scheme 15

Scheme 15: PROCEDURE
Scheme 15: PROCEDURE

Scheme 16

Scheme 16
Scheme 16
  1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Active Test. Check that the lights operate. MAIN BODY Tester Display Test Part Control Range Diagnostic Note Illuminated Entry System Front interior lights, rear interior light and scuff plate lights ON/OFF Interior light on/off switch off (not pushed), personal light switch off (not pushed) and all doors closed OK Each light fades in. NG --> See step 2 OK --> See step 5
  2. CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Disconnect the 2B instrument panel junction block assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 2B-27 - Body ground Power switch off 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Instrument Panel Junction Block Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-27 - A-1 (ILE) Always Below 1 ohms A-1 (ILE) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument Panel Junction Block Assembly) *2 Instrument Panel Junction Block Assembly NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK --> See step 4
  4. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/body-electrical/#power-distribution-service-information)
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398302-S25787969952011051600000)

The main body ECU (multiplex network body ECU) detects the condition of the interior light door switch and interior light on/off switch.

Scheme 17

Scheme 17: WIRING DIAGRAM
Scheme 17: WIRING DIAGRAM

Scheme 18

Scheme 18: PROCEDURE
Scheme 18: PROCEDURE

Scheme 19

Scheme 19
Scheme 19

Scheme 20

Scheme 20
Scheme 20
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Dome Light DOOR SW Interior light door switch signal/ON or OFF ON: Interior light door switch not pushed OFF: Interior light door switch pushed - Dome Light SW Interior light on/off switch signal/ON or OFF ON: Interior light on/off switch pushed OFF: Interior light on/off switch not pushed - OK Normal conditions listed above are displayed. Result Result Proceed to Interior light door switch does not operate A Interior light on/off switch does not operate B Both interior light door switch and on/off switch do not operate C OK D C --> See step 6 B --> See step 4 A --> See step 2 D --> See step 7
  2. INSPECT MAP LIGHT ASSEMBLY Remove the map light assembly. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information) . Measure the resistance according to the value(s) in the table. Standard Resistance Tester Connection Condition Specified Condition 7 (DOOR) - 15 (GND) Interior light door switch off (pushed) 10 kohms or higher Interior light door switch on (not pushed) Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Map Light Assembly) NG --> See step 8 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU) Disconnect the P10 map light assembly connector. Disconnect the F7 main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table. Standard Resistance Tester Connection Condition Specified Condition P10-7 (DOOR) - F7-25 (DMDR) Always Below 1 ohms P10-7 (DOOR) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
  4. INSPECT MAP LIGHT ASSEMBLY Remove the map light assembly. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information) . Measure the resistance according to the value(s) in the table. Standard Resistance Tester Connection Condition Specified Condition 8 (CILL) - 15 (GND) Interior light on/off switch off (not pushed) 10 kohms or higher Interior light on/off switch on (pushed) Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Map Light Assembly) NG --> See step 8 OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU) Disconnect the P10 map light assembly connector. Disconnect the F7 main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table. Standard Resistance Tester Connection Condition Specified Condition P10-8 (CILL) - F7-26 (DMON) Always Below 1 ohms P10-8 (CILL) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 9
  6. INSPECT MAP LIGHT ASSEMBLY Remove the map light assembly. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information) . Measure the resistance according to the value(s) in the table. Standard Resistance Tester Connection Condition Specified Condition 7 (DOOR) - 15 (GND) Interior light door switch off (pushed) 10 kohms or higher Interior light door switch on (not pushed) Below 1 ohms 8 (CILL) - 15 (GND) Interior light on/off switch off (not pushed) 10 kohms or higher Interior light on/off switch on (pushed) Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Map Light Assembly) NG --> See step 8 OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MAP LIGHT ASSEMBLY - BODY GROUND)
  7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398302-S25787969952011051600000)
  8. REPLACE MAP LIGHT ASSEMBLY. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information)
  9. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/body-electrical/#power-distribution-service-information)

The main body ECU (multiplex network ECU) controls the footwell lights.

Scheme 21

Scheme 21: WIRING DIAGRAM
Scheme 21: WIRING DIAGRAM

Scheme 22

Scheme 22: PROCEDURE
Scheme 22: PROCEDURE

Scheme 23

Scheme 23
Scheme 23
  1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Active Test. Check that the footwell lights come on. MAIN BODY Tester Display Test Part Control Range Diagnostic Note Step Light Operation Footwell lights ON/OFF Power switch off OK Footwell lights come on. NG --> See step 2 OK --> See step 5
  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BATTERY) Disconnect the 2B instrument panel junction block assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 2B-17 - Body ground Power switch off 11 to 14 V 2B-18 - Body ground Power switch off 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Instrument Panel Junction Block Assembly) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-17 - A-26 (FSPT) Always Below 1 ohms 2B-18 - A-26 (FSPT) Always Below 1 ohms A-26 (FSPT) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument Panel Junction Block Assembly) NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK --> See step 4
  4. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/body-electrical/#power-distribution-service-information)
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398302-S25787969952011051600000)

The main body ECU (multiplex network body ECU) controls the center console spot light.

Scheme 24

Scheme 24: WIRING DIAGRAM
Scheme 24: WIRING DIAGRAM

Scheme 25

Scheme 25: PROCEDURE
Scheme 25: PROCEDURE
  1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Active Test. Check that the center console spot light comes on. MAIN BODY Tester Display Test Part Control Range Diagnostic Note Center Console Spot LGT Center console spot light ON/OFF Power switch off OK Center console spot light comes on. NG --> See step 2 OK --> See step 5
  2. INSPECT MAP LIGHT ASSEMBLY Remove the map light assembly. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information) . Connect a positive (+) lead from the battery to terminal 11 (+B1) and a negative (-) lead to terminal 24 (SHFT). Check that the center console spot light comes on. OK Center console spot light comes on. TEXT IN ILLUSTRATION *1 Component without harness connected (Map Light Assembly) NG --> See step 4 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - MAIN BODY ECU AND BODY GROUND) Disconnect the P10 map light assembly connector. Disconnect the F8 main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P10-24 (SHFT) - F8-5 (CSPT) Always Below 1 ohms P10-24 (SHFT) - Body ground Always 10 kohms or higher Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition P10-11 (+B1) - Body ground Power switch off 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  4. REPLACE MAP LIGHT ASSEMBLY. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/interiorillumination-lights/#lighting-interior-service-information)
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398302-S25787969952011051600000)
  6. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/body-electrical/#power-distribution-service-information)

The illuminated entry system controls the power switch illumination.

Scheme 26

Scheme 26: WIRING DIAGRAM
Scheme 26: WIRING DIAGRAM

Scheme 27

Scheme 27: PROCEDURE
Scheme 27: PROCEDURE
  1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Access / Active Test. Check that the illumination operates. SMART ACCESS Tester Display Test Part Control Range Diagnostic Note Power/Engine SW Light Power switch illumination ON/OFF All doors closed OK Power switch illumination comes on. NG --> See step 2 OK --> See step 5
  2. INSPECT POWER SWITCH Remove the power switch. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/starter/#power-switch-service-information) . Connect a positive (+) lead from the battery to terminal 11 (SWIL) and a negative (-) lead to terminal 5 (GND). Check that the power switch illumination comes on. OK Power switch illumination comes on. TEXT IN ILLUSTRATION *1 Component without harness connected (Power Switch) NG --> See step 4 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (POWER SWITCH - CERTIFICATION ECU AND BODY GROUND) Disconnect the F50 certification ECU (smart key ECU assembly) connector. Disconnect the F2 power switch connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F2-11 (SWIL) - F50-11 (SWIL) Always Below 1 ohms F2-11 (SWIL) - Body ground Always 10 kohms or higher F2-5 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  4. REPLACE POWER SWITCH. Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/starter/#power-switch-service-information)
  5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398302-S25787969952011051600000)
  6. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-398251-S14180786362011051600000)

The main body ECU (multiplex network body ECU) detects the condition of each door unlock detection switch.

Scheme 28

Scheme 28: WIRING DIAGRAM
Scheme 28: WIRING DIAGRAM

Scheme 29

Scheme 29: PROCEDURE
Scheme 29: PROCEDURE
  1. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note FL Door Lock Pos Front door unlock detection switch LH signal/ON or OFF ON: Front door LH unlocked OFF: Front door LH locked - FR Door Lock Pos Front door unlock detection switch RH signal/ON or OFF ON: Front door RH unlocked OFF: Front door RH locked - RL-Door Lock Pos SW Rear door unlock detection switch LH signal/ON or OFF ON: Rear door LH unlocked OFF: Rear door LH locked - RR-Door Lock Pos SW Rear door unlock detection switch RH signal/ON or OFF ON: Rear door RH unlocked OFF: Rear door RH locked - Result Result Proceed to OK A Front door unlock detection switch LH does not operate B Front door unlock detection switch RH does not operate C Rear door unlock detection switch LH does not operate D Rear door unlock detection switch RH does not operate E E --> See step 9 D --> See step 6 C --> See step 4 B --> See step 2 A --> See step 11
  2. INSPECT FRONT DOOR LOCK ASSEMBLY LH Inspect the front door lock assembly LH. Refer to «INSPECTION»(ref-398328-S03200343152011051600000) . OK Front door lock assembly LH is normal. NG --> See step 12 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY LH - MAIN BODY ECU AND BODY GROUND) Disconnect the I9 front door lock assembly LH connector. Disconnect the F9 main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition I9-8 (LSSR) - F9-7 (LSFL) Always Below 1 ohms I9-8 (LSSR) - Body ground Always 10 kohms or higher I9-7 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
  4. INSPECT FRONT DOOR LOCK ASSEMBLY RH Inspect the front door lock assembly RH. Refer to «INSPECTION»(ref-398328-S03200343152011051600000) . OK Front door lock assembly RH is normal. NG --> See step 14 OK: Go to next step
  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY RH - MAIN BODY ECU AND BODY GROUND) Disconnect the H9 front door lock assembly RH connector. Disconnect the F9 main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H9-7 (LSSR) - F9-18 (LSFR) Always Below 1 ohms H9-7 (LSSR) - Body ground Always 10 kohms or higher H9-8 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
  6. INSPECT REAR DOOR LOCK ASSEMBLY LH Inspect the rear door lock assembly LH. Refer to «INSPECTION»(ref-398328-S39964111632011051600000) . OK Rear door lock assembly LH is normal. NG --> See step 15 OK: Go to next step
  7. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK ASSEMBLY LH - JUNCTION BLOCK AND BODY GROUND) Disconnect the K5 rear door lock assembly LH connector. Disconnect the 2D instrument panel junction block assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition K5-6 (LSSR) - 2D-25 Always Below 1 ohms K5-6 (LSSR) - Body ground Always 10 kohms or higher K5-9 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  8. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2D-25 - A-5 (LSR) Always Below 1 ohms 2D-25 - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument Panel Junction Block Assembly) NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK --> See step 13
  9. INSPECT REAR DOOR LOCK ASSEMBLY RH Inspect the rear door lock assembly RH. Refer to «INSPECTION»(ref-398328-S39964111632011051600000) . OK Rear door lock assembly RH is normal. NG --> See step 16 OK: Go to next step
  10. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK ASSEMBLY RH - MAIN BODY ECU AND BODY GROUND) Disconnect the J5 rear door lock assembly RH connector. Disconnect the F7 main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition J5-6 (LSSR) - F7-2 (LSWR) Always Below 1 ohms J5-6 (LSSR) - Body ground Always 10 kohms or higher J5-9 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
  11. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398302-S25787969952011051600000)
  12. REPLACE FRONT DOOR LOCK ASSEMBLY LH. Refer to «REMOVAL»(ref-398328-S41608986992011051600000)
  13. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(/lexus/hs/i-2009-2012/remont/body-electrical/#power-distribution-service-information)
  14. REPLACE FRONT DOOR LOCK ASSEMBLY RH. Refer to «REMOVAL»(ref-398328-S41608986992011051600000)
  15. REPLACE REAR DOOR LOCK ASSEMBLY LH. Refer to «REMOVAL»(ref-398328-S29590846292011051600000)
  16. REPLACE REAR DOOR LOCK ASSEMBLY RH. Refer to «REMOVAL»(ref-398328-S29590846292011051600000)

See also:
• INSPECTION
• REMOVAL
• REMOVAL

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