w/ Smart Entry and Start System:
Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Service Bulletin.
Inspect the fuses for circuits related to this system before performing the following procedure.
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| All interior light control functions do not operate under any condition. | Map light assembly | 202304,999999,_58,_083095,_0400587,RM1000000029RU3,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Actuation area-linked control function does not operate when registered key is brought into any exterior detection area (w/ Smart Entry and Start System). | CAN communication system (for SFTM Made, HV Model) | 202409,999999,_57,_083091,_0694853,RM100000002NT0M,
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| CAN communication system (for SFTM Made, Gasoline Model) | 202409,999999,_57,_083091,_0694854,RM100000002NUBH,
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| CAN communication system (for GTMC Made, HV Model) | 202409,999999,_57,_083091,_0694855,RM100000002NTBR,
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| CAN communication system (for GTMC Made, Gasoline Model) | 202409,999999,_57,_083091,_0694856,RM100000002NTA4,
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| Smart entry and start system (for Entry Function, HV Model) | 202409,999999,_58,_083094,_0402997,RM100000002NSU7,
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| Smart entry and start system (for Entry Function, Gasoline Model) | 202409,999999,_58,_083094,_0402998,RM100000002NSUY,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Door lock/unlock-linked control function does not operate when doors are locked/unlocked. | Door unlock detection switch circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSQS,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Door open/close-linked control function does not operate when doors are opened/closed. | Door courtesy switch circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSNO,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Push start switch illumination does not illuminate (w/ Smart Entry and Start System). | Push start switch illumination circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSQQ,
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| Certification ECU (smart key ECU assembly) | Refer to Service Bulletin | |
| Push start switch illumination does not blink (w/ Smart Entry and Start System). | Certification ECU (smart key ECU assembly) | Refer to Service Bulletin |
| Push start switch-linked control function does not operate when push start switch is operated (w/ Smart Entry and Start System). | IG signal circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSNM,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Ignition switch-linked control function does not operate when ignition switch is operated (w/o Smart Entry and Start System). | IG signal circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSNM,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Shift position-linked control function does not operate when shift lever to P | Continuously variable transaxle system (for K121) | 202405,999999,_52,_138176,_0584691,RM100000002MH15,
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| Continuously variable transaxle system (for K121F) | 202405,999999,_52,_138817,_0596468,RM100000002MH1A,
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| Hybrid control system | 202409,999999,_51,_083048,_0709511,RM100000002NGYI,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Symptom | Suspected Area | Link |
|---|---|---|
| Map light LH or RH does not illuminate. | Map light sub-assembly | 202304,999999,_58,_083095,_0400587,RM1000000029RU3,
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| Harness or connector | - | |
| Dome light does not illuminate. | Map light assembly | 202304,999999,_58,_083095,_0400587,RM1000000029RU3,
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| Harness or connector | - | |
| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Symptom | Suspected Area | Link |
|---|---|---|
| Spot light does not illuminate. | No. 1 room light assembly | 202304,999999,_58,_083095,_0400589,RM1000000029TDK,
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| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| No. 1 luggage compartment light assembly does not illuminate. | No. 1 luggage compartment light assembly | 202304,999999,_58,_083095,_0400591,RM1000000029TDN,
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| Back door courtesy switch circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSNQ,
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| Harness or connector | - | |
| Power distribution box assembly | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Symptom | Suspected Area | Link |
|---|---|---|
| Interior illumination light does not illuminate. | Interior light circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSNS,
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| Front footwell light (for Driver Side) does not illuminate. | No. 1 interior illumination light assembly LH (footwell light) | 201910,999999,_58,_083095,_0400598,RM100000001J8NF,
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| Harness or connector | - | |
| Power distribution box assembly | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Front footwell light (for Front Passenger Side) does not illuminate. | No. 1 interior illumination light assembly RH (footwell light) | 201910,999999,_58,_083095,_0400599,RM100000001J8NJ,
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| Harness or connector | - | |
| Power distribution box assembly | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Cup holder light does not illuminate. | Console box illumination light assembly (cup holder light) | 202004,999999,_58,_083095,_0418878,RM100000001MNGH,
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| Harness or connector | - | |
| Tray light (for Driver Side) does not illuminate (w/ Tray Light). | No. 1 interior illumination light assembly (driver side tray light) | 202004,999999,_58,_083095,_0418876,RM100000001MNG8,
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| Harness or connector | - | |
| Tray light (for Front Passenger Side) does not illuminate (w/ Tray Light). | Interior illumination light sub-assembly (front passenger side tray light) | 202004,999999,_58,_083095,_0418877,RM100000001MNGB,
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| Harness or connector | - | |
| Tray light (for Center) does not illuminate (w/ Tray Light). | No. 1 interior illumination light assembly (center tray light) | 202004,999999,_58,_083095,_0418878,RM100000001MNGH,
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| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Transponder key coil does not illuminate. | Transponder key coil | 201910,999999,_58,_083095,_0407553,RM100000001KOS2,
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| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| All vanity lights do not illuminate. | Harness or connector | - |
| Front vanity light LH does not illuminate. | Vanity light assembly LH | 202304,999999,_58,_083095,_0400585,RM1000000029TDI,
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| Harness or connector | - | |
| Visor assembly LH | 202304,999999,_58,_083106,_0400609,RM1000000029RST,
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| Front vanity light RH does not illuminate. | Vanity light assembly RH | 202304,999999,_58,_083095,_0400585,RM1000000029TDI,
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| Harness or connector | - | |
| Visor assembly RH | 202304,999999,_58,_083106,_0400609,RM1000000029RST,
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| Symptom | Suspected Area | Link |
|---|---|---|
| All the interior lights that receive power via the DOME CUT relay do not illuminate. | Interior light auto cut circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSOO,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Symptom | Suspected Area | Link |
|---|---|---|
| Battery saving function does not operate. | IG signal circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSNM,
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| Door courtesy switch circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSNO,
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| Back door courtesy switch circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSNQ,
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| Door unlock detection switch circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSQS,
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| Interior light auto cut circuit | 202409,999999,_58,_083095,_0400584,RM100000002NSOO,
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| Main body ECU (multiplex network body ECU) | 202409,999999,_57,_083090,_0403094,RM100000002NG0W,
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| Symptom | Suspected Area | Link |
|---|---|---|
| No instrument panel illumination lights come on (taillights operate normally). | Instrument panel illumination does not turn on | 202409,999999,_58,_083095,_0400584,RM100000002NSQT,
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