Lighting System (Interior) (Diagnostics & Circuit Tests) (Plug-In): Overview Toyota Prius Plug-in

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 Light Rear Interior Light When a registered key leaves all of the actuation areas around the doors, the lights that operate turn off. Door Lock/Unlock-linked When any door is unlocked, the lights that operate turn on. Power Switch Illumination Front Interior Light Rear Interior Light Footwell Light When all doors are locked, the lights that operate turn off. Door Open/Close-linked When any door is opened, the lights that operate turn on. Power Switch Illumination Front Interior Light Rear Interior Light Footwell Light 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 Light Rear Interior Light When the power switch is turned from off to on (ACC or IG), the lights that operate turn off. When the power switch is turned from off to on (IG), the lights that operate turn on. Footwell Light Shift Position-linked When the power switch is on (IG) and the shift lever is moved out of P, the lights that operate dim. Footwell Light 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 Light Rear Interior Light When approximately 15 seconds elapse after any of the following conditions is met, the lights that operate turn off: The door unlock-linked function is active. Any door is opened and then all doors are closed when the power switch is off. Footwell Light Battery Saving When no changes occur in the condition of the doors for 20 minutes and a key is not in the actuation area, these lights turn off. Power Switch Illumination Front Interior Light Rear Interior Light When no changes occur in the condition of the doors for 20 minutes, the footwell lights turn off. Footwell Light

OPERATION CHECK

1. INSPECT INTERIOR LIGHT CONTROL OPERATION NOTE: When troubleshooting a function, first make sure that the function is set to the default setting. HINT: The interior light control illuminates the lights below. Power Switch Illumination Front Interior Lights Rear Interior Light The operation and operation conditions of this control are described below. Operation 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, all doors are closed and locked. The power switch is turned from on (ACC) 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 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 closed and locked. Battery saver When no changes occur in the condition of the doors for 20 minutes and a key is not in the actuation area, these lights 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: When troubleshooting a function, first make sure that the function is set to the default setting. HINT: The footwell light control illuminates the lights below. Footwell light LH Footwell light RH The operation and operation conditions of this control are described below. Operation Operation Condition Fade in and illuminate constantly When any of the following conditions is met, the footwell light LH and footwell light RH fade in. Any door is opened when all door 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. Dim When the power switch is on (READY) and with park (P) selected, the shift lever is moved to select another shift state, the lights that operate dim. Battery saver When no changes occur in the condition of the doors for 20 minutes, the footwell lights turn 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 36

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

Scheme 37

The main body ECU (multiplex network body ECU) detects the condition of the front door courtesy light switch using this circuit.

Scheme 38

Scheme 39

Scheme 40

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 FR Door Courtesy SW Front door courtesy light switch RH signal/ON or OFF ON: Front door RH open OFF: Front door RH closed - FL Door Courtesy SW Front door courtesy light switch LH signal/ON or OFF ON: Front door LH open OFF: Front door LH 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 B --> See step 2 A --> See step 6
2. INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LH OR RH) Remove the front door courtesy light switch assembly. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/interiorillumination-lights/#lighting-system-interior-service-information-plug-in) . Inspect the front door courtesy light switch assembly. Refer to «INSPECTION»(/toyota/prius-plug-in/2012-2014/remont/interiorillumination-lights/#lighting-system-interior-service-information-plug-in) . OK Front door courtesy light switch assembly is normal. NG --> See step 5 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY) for Front LH Disconnect the 2D instrument panel junction block assembly connector. Disconnect the R6 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 2D-35 - R6-1 Always Below 1 ohms 2D-35 - Body ground Always 10 kohms or higher for Front RH Disconnect the 2D instrument panel junction block assembly connector. Disconnect the S5 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 2D-36 - S5-1 Always Below 1 ohms 2D-36 - 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. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2D-35 - MB-2 (FLCY) Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) for Front RH Remove the instrument panel junction block assembly. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2D-36 - MB-4 (FRCY) Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 8 OK --> See step 7
5. REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/interiorillumination-lights/#lighting-system-interior-service-information-plug-in)
6. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-553300-S00889000902013051700000)
7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in)
8. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in)

The main body ECU (multiplex network body ECU) detects the condition of the rear door courtesy light switch using this circuit.

Scheme 41

The main body ECU (multiplex network body ECU) detects the condition of the back door lock assembly using this circuit.

Scheme 42

The main body ECU (multiplex network body ECU) controls the operation of the following lights

1. Map light assembly
2. No. 1 room light

Scheme 43

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

Scheme 44

The illuminated entry system controls the power switch illumination.

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

Scheme 45

Scheme 46

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 locked and rear door RH unlocked ON: Rear door LH unlocked and rear door RH locked ON: Rear door LH and rear door RH unlocked OFF: Rear door LH and rear door RH locked - RR-Door Lock Pos SW Rear door unlock detection switch RH signal/ON or OFF ON: Rear door LH locked and rear door RH unlocked ON: Rear door LH unlocked and rear door RH locked ON: Rear door LH and rear door RH unlocked OFF: Rear door LH and rear door RH locked - OK Normal conditions listed above are displayed. 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 and rear door unlock detection switch RH does not operate D B --> See step 2 C --> See step 4 D --> See step 6 A --> See step 11
2. INSPECT FRONT DOOR LOCK ASSEMBLY LH Remove the front door lock assembly LH. Refer to «REMOVAL»(ref-553516-S22013981722013051700000). Inspect the front door lock assembly LH. Refer to «INSPECTION»(ref-553516-S16644192022013051700000). 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 (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) Disconnect the O8 front door lock assembly LH connector. Disconnect the L7 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 O8-8 (LSSR) - L7-7 (LSFL) Always Below 1 ohms O8-8 (LSSR) - Body ground Always 10 kohms or higher O8-7 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 16
4. INSPECT FRONT DOOR LOCK ASSEMBLY RH Remove the front door lock assembly RH. Refer to «REMOVAL»(ref-553516-S22013981722013051700000). Inspect the front door lock assembly RH. Refer to «INSPECTION»(ref-553516-S16644192022013051700000). OK Front door lock assembly RH is normal. NG --> See step 13 OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) Disconnect the N8 front door lock assembly RH connector. Disconnect the L7 main body ECU (multiplex network body ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection (Symbols) Condition Specified Condition N8-7 (LSSR) - L7-18 (LSFR) Always Below 1 ohms N8-7 (LSSR) - Body ground Always 10 kohms or higher N8-8 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 16
6. INSPECT REAR DOOR LOCK WITH MOTOR ASSEMBLY LH Remove the rear door lock with motor assembly LH. Refer to «REMOVAL»(ref-553516-S39212060212013051700000). Inspect the rear door lock with motor assembly LH. Refer to «INSPECTION»(ref-553516-S26074370762013051700000). OK Rear door lock with motor assembly LH is normal. NG --> See step 14 OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK WITH MOTOR ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND) Disconnect the Q1 rear door lock with motor 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 Q1-6 (LSSR) - 2D-25 Always Below 1 ohms Q1-6 (LSSR) - Body ground Always 10 kohms or higher Q1-9 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
8. INSPECT REAR DOOR LOCK WITH MOTOR ASSEMBLY RH Remove the rear door lock with motor assembly RH. Refer to «REMOVAL»(ref-553516-S39212060212013051700000). Inspect the rear door lock with motor assembly RH. Refer to «INSPECTION»(ref-553516-S26074370762013051700000). OK Rear door lock with motor assembly RH is normal. NG --> See step 15 OK: Go to next step
9. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK WITH MOTOR ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND) Disconnect the P1 rear door lock with motor assembly RH connector. Disconnect the 2B 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 P1-6 (LSSR) - 2B-29 Always Below 1 ohms P1-6 (LSSR) - Body ground Always 10 kohms or higher P1-9 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
10. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in) . TEXT IN ILLUSTRATION *a Component without harness connected (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-29 - MB-5 (LSR) Always Below 1 ohms 2D-25 - MB-5 (LSR) Always Below 1 ohms NG --> See step 17 OK --> See step 16
11. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-553300-S00889000902013051700000)
12. REPLACE FRONT DOOR LOCK ASSEMBLY LH. Refer to «REMOVAL»(ref-553516-S22013981722013051700000)
13. REPLACE FRONT DOOR LOCK ASSEMBLY RH. Refer to «REMOVAL»(ref-553516-S22013981722013051700000)
14. REPLACE REAR DOOR LOCK WITH MOTOR ASSEMBLY LH. Refer to «REMOVAL»(ref-553516-S39212060212013051700000)
15. REPLACE REAR DOOR LOCK WITH MOTOR ASSEMBLY RH. Refer to «REMOVAL»(ref-553516-S39212060212013051700000)
16. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in)
17. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-plug-in/2012-2014/remont/body-electrical/#power-distribution-service-information-plug-in)

See also:
• REMOVAL
• INSPECTION
• REMOVAL