Use the table below to help find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these parts.
| Symptom | Suspected Area | See page |
|---|---|---|
| Illuminated entry system does not operate. | Wireless door lock control system (w/ Smart Entry and Start System) | |
| Wireless door lock control system (w/o Smart Entry and Start System) | ||
| DOME No. 1 fuse | - | |
| Front door courtesy switch | ||
| Rear door courtesy switch | ||
| Back door courtesy switch | ||
| Front door lock assembly LH (for LHD) | ||
| Front door lock assembly RH (for RHD) | ||
| Harness or connector | - | |
| Instrument panel junction block (main body ECU) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Either low beam headlight does not come on. | H-LP LH-LO fuse or H-LP RH-LO fuse | - |
| Headlight light control ECU sub-assembly | ||
| Instrument panel relay block (built-in HD-LP No. 2 relay or HD-LP No. 1 relay) | - | |
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - | |
| Either high beam headlight does not come on. | H-LP LH-HI fuse or H-LP RH-HI fuse | - |
| Bulb | - | |
| Instrument panel relay block (built-in DIM No. 2 relay or DIM No. 1 relay) | - | |
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - | |
| Both low beam headlights do not come on. | Headlight dimmer switch | |
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - | |
| Both high beam headlights do not come on. | Headlight dimmer switch | - |
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - | |
| "Flash" does not come on. | Headlight dimmer switch | - |
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Both low beam and high beam headlights do not come on. | HEAD fuse | - |
| HEAD relay | - | |
| DIM relay | - | |
| Instrument panel junction block (main body ECU)* | ||
| Harness or connector | - | |
| Low beam headlights do not come on. | H-LP LH-LO fuse or H-LP RH-LO fuse | - |
| Bulb | - | |
| DIM relay | - | |
| Headlight dimmer switch | ||
| Instrument panel junction block (main body ECU)* | ||
| Harness or connector | - | |
| High beam headlights do not come on. | H-LP LH-HI fuse or H-LP RH-HI fuse | - |
| Bulb | - | |
| DIM relay | - | |
| Headlight dimmer switch | ||
| Instrument panel junction block (main body ECU)* | ||
| Harness or connector | - | |
| "Flash" does not come on. | Headlight dimmer switch | |
| Instrument panel junction block (main body ECU)* | ||
| Harness or connector | - |
*: w/ Key Confine Prevention Function
| Symptom | Suspected Area | See page |
|---|---|---|
| Both taillights do not come on. | TAIL fuse | - |
| PANEL No. 1 fuse | - | |
| Headlight dimmer switch | ||
| Instrument panel junction block (main body ECU) (built-in T-LP relay) | ||
| Harness or connector | - | |
| Either taillight does not come on. | Bulb | - |
| Rear combination light assembly | ||
| Rear combination light assembly (w/ Aero Stabilizing Fin) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Both front fog lights do not come on. | FOG FR fuse | - |
| Headlight dimmer switch | ||
| Instrument panel relay block (built-in FR FOG relay) | ||
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - | |
| Either front fog light does not come on. | Bulb | - |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Rear fog light does not come on. | FOG RR fuse | - |
| FOG RR relay | - | |
| Bulb | - | |
| Rear combination light assembly | ||
| Rear combination light assembly (w/ Aero Stabilizing Fin) | ||
| Headlight dimmer switch | ||
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Both back up lights do not come on. (w/o Rear Fog Light) | Back up light switch (for G55 Manual Transmission) | |
| Back up light switch (for R351 Manual Transmission) | ||
| Park/neutral position switch (for A340E Automatic Transmission) | ||
| Park/neutral position switch (A343E Automatic Transmission) | ||
| Harness or connector | - | |
| Either back up light does not come on. (w/o Rear Fog Light) | Bulb | - |
| Rear combination light assembly | ||
| Rear combination light assembly (w/ Aero Stabilizing Fin) | ||
| Harness or connector | - | |
| Back up light does not come on. (w/ Rear Fog Light) | Bulb | - |
| Back up light switch (for G55 Manual Transmission) | ||
| Back up light switch (for R351 Manual Transmission) | ||
| Park/neutral position switch (for A340E Automatic Transmission) | ||
| Park/neutral position switch (A343E Automatic Transmission) | ||
| Rear combination light assembly | ||
| Rear combination light assembly (w/ Aero Stabilizing Fin) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Both stop lights do not come on. | STOP No. 1 fuse | - |
| Stop light switch | ||
| Harness or connector | - | |
| Either stop light does not come on. | Bulb | - |
| Rear combination light assembly | ||
| Rear combination light assembly (w/ Aero Stabilizing Fin) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Center stop light does not come on (other stop lights are normal). | Center stop light assembly | |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Both turn signal lights do not come on. | Turn signal switch circuit | |
| Harness or connector | - | |
| Combination meter assembly | ||
| Either turn signal light does not come on. | Meter/gauge system |
| Symptom | Suspected Area | See page |
|---|---|---|
| Hazard warning signal light system does not operate (turn signal light system is normal). | TRN&HAZ fuse | - |
| Hazard warning switch circuit | ||
| Combination meter assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Ignition key cylinder light does not come on (personal light or front room light is normal). | Ignition key cylinder light | |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Transponder key light does not come on (personal light or front room light is normal). | Transponder key coil | - |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Engine switch illumination does not illuminate. | Headlight dimmer switch | |
| Engine switch illumination circuit | ||
| Certification ECU (smart key ECU assembly) | - | |
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Personal light does not come on. | DOME No. 1 fuse | - |
| Bulb | - | |
| Personal light assembly | ||
| Front door courtesy switch | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Front room light does not come on. | DOME No. 1 fuse | - |
| Bulb | - | |
| Front room light assembly | ||
| Front door courtesy switch | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Center room light does not come on (personal light or front room light is normal). | Bulb | - |
| Center room light assembly | ||
| Rear door courtesy switch | ||
| Back door courtesy switch | ||
| Room light switch | - | |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Rear room light does not come on (personal light or front room light is normal). | Bulb | - |
| Rear room light assembly | ||
| Rear door courtesy switch | ||
| Back door courtesy switch | ||
| Room light switch | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Step light does not come on (personal light or front room light is normal). | Bulb | - |
| Step light assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Automatic light control system does not operate. | Automatic light control sensor | |
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Light auto turn off system does not operate (other lighting systems are normal). | Instrument panel junction block (main body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Manual headlight beam level control system does not operate. | Headlight leveling switch | |
| Headlight leveling motor | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Automatic headlight beam level control system does not operate. | CAN communication system | |
| Headlight leveling ECU power source circuit | ||
| Headlight signal circuit | ||
| Headlight beam level control actuator circuit | ||
| Headlight leveling ECU assembly (for LHD) | ||
| Headlight leveling ECU assembly (for RHD) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Battery saving function (basic function) does not operate. (w/ Smart Entry and Start System) | Front door courtesy switch | |
| Harness or connector | - | |
| Instrument panel junction block (main body ECU) | ||
| Certification ECU (smart key ECU assembly) | - | |
| Battery saving function (interior light auto cut function) does not operate. (w/ Key Confine Prevention Function) | Instrument panel relay block (built-in DOME CUT relay) | - |
| Instrument panel junction block (main body ECU) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Daytime running light system does not operate. | Bulb | - |
| DRL fuse | - | |
| Instrument panel relay block (built-in DRL relay) | - | |
| CAN communication system | ||
| Headlight dimmer switch | ||
| Parking brake switch assembly | ||
| Harness or connector | - | |
| Combination meter assembly |