The Lexus CT 200h is a compact premium hybrid hatchback. Built on a modified Lexus IS platform, key components—including the rear suspension and hybrid powertrain—were developed specifically for this model from the ground up. Featuring short overhangs and an integrated rear roof spoiler, the CT 200h offers a sporty stance and achieved strong market adoption throughout its production run.
The vehicle’s electrical power circuits are protected by a network of fuses and relays housed in power distribution blocks located in the engine compartment, passenger compartment, and luggage compartment. This guide provides detailed fuse box diagrams and terminal assignments for the 1st-generation Lexus CT 200h (chassis ZWA10; 2011, 2012, 2013, 2014, 2015, 2016, and 2017 model years).
Engine Compartment
Component Location: 1. Fuse box, 2. Hybrid inverter, 3. Headlight washer relay, 4. Right-hand drive (RHD): Brake control ECU, 5. Left-hand drive (LHD): Brake control ECU, 6. Engine Control Module (ECM).
Fuse box location.
Engine compartment fuse box overview.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Heater | 15 |
| 2 | Cooling fan | 30 |
| 3 | 30 | |
| 4 | Audio system, navigation system | 15 |
| 5 | Security alarm system, navigation system | 10 |
| 6 | Electric water pump / Engine cooling system | 30 |
| 7 | ABS control system | 7.5 |
| 8 | — | — |
| 9 | Headlight washers | 30 |
| 10 | Shift control system, transmission control unit | 30 |
| 11 | Audio amplifier | 30 |
| 12 | Multiport fuel injection system / sequential multiport fuel injection system (EFI/SFI) | 10 |
| 13 | Power control unit fuses: “PCU”, “IGCT NO. 2”, “IGCT NO. 3” | 30 |
| 14 | Inverter with DC-DC converter | 5 |
| 15 | Shift control ECU | 7.5 |
| 16 | Power management system | 7.5 |
| 17 | Smart Entry & Start System | 7.5 |
| 18 | Telematics system | 10 |
| 19 | Air conditioning system | 10 |
| 20 | Turn signals and hazard warning lights | 10 |
| 21 | Audio amplifier | 30 |
| 22 | ABS system | 20 |
| 23 |
|
40 |
| 24 | ABS control system | 30 |
| 25 | 30 | |
| 26 | Headlight high-beam fuses: “H-LP RH HI”, “H-LP LH HI” | 20 |
| 27 | Daytime Running Lights (DRL) | 7.5 |
| 28 | Central door locking system | 25 |
| 29 | — | — |
| 30 | Fuses: “IG2”, “EFI MAIN”, “BATT FAN” | 60 |
| 31 | Electronic Power Steering (EPS) | 60 |
| 32 | Hybrid control system | 10 |
| 33 | Hybrid control system, Power management system, Shift selector | 10 |
| 34 | Engine cooling system | 10 |
| 35 | — | — |
| 36 | Interior and luggage compartment illumination, overhead console, scuff plate and footwell lighting, personal map lights, vanity mirror lights | 10 |
| 37 | Smart Entry & Start System, Occupant Detection System (Passenger Classification), instrument cluster, power mirrors, driver seat memory, air conditioning, Electronic Power Steering (EPS) | 7.5 |
| 38 | Left headlight (high beam) | 10 |
| 39 | Right headlight (high beam) | 10 |
| 40 | Multiport fuel injection system / sequential multiport fuel injection system (EFI/SFI) | 10 |
| 41 | Heated exterior mirrors | 10 |
| 42 | — | — |
| 43 | Sequential multiport fuel injection system, cooling system, fuse: “EFI NO. 2” | 20 |
| 44 | Hybrid battery cooling fan | 10 |
| 45 | Multiport fuel injection system / sequential multiport fuel injection system, hybrid control system, power management system, “MET”, “IGN” fuses | 20 |
| Relays | ||
| R1 | (FAN NO. 2) Cooling fan relay | |
| R2 | Integrated relay | |
| R3 | (FAN NO. 3) Cooling fan relay | |
| R4 | (FAN NO. 1) Cooling fan relay | |
| R5 | (DRL) Daytime running lights relay | |
| R6 | — | |
| R7 | (IGCT) Power control module relay | |
| R8 | (DIM) Headlight dimmer relay | |
| R9 | (P CON MTR) Shift control motor relay | |
| R10 | (ENG W/P) Electric water pump relay | |
|
||
| 1 | Integrated relay; “TAIL” relay; “P/POINT” relay; “ACC” relay; “IG1 NO. 1” relay; “IG1 NO. 2” relay; “IG1 NO. 3” relay; fuses: “HTR”, “RDI”, “CDS”, “S-HORN”, “ENG W/P”, “ABS MAIN NO. 2”, “H-LP CLN”, “FR FOG”, “PWR SEAT FL”, “OBD”, “STOP”, “RR FOG”, “DBL LOCK”, “PWR SEAT FR”, “DOOR NO. 1”, “PSB”, “D FR DOOR”, “P FR DOOR”, “DOOR RL”, “DOOR RR”, “S/ROOF” | 125 |
Passenger Compartment
Component Location: 1. Auxiliary Fuse Box No. 1, 2. Main Fuse Box (No. 2), 3. Stop lamp control unit, 4. Relay box, 5. Heated steering wheel relay, 6. Turn signal & hazard flasher relay, 7. Electronic Power Steering (EPS) ECU, 8. CAN Junction Connector No. 1, 9. CAN Junction Connector No. 2, 10. Seat belt pretensioner ECU, 11. Driver assistance system ECU, 12. Parking assist ECU, 13. Automatic headlight leveling ECU, 14. Parking sensor ECU, 15. Transmission / Shift control ECU, 16. Power Management ECU, 17. Windshield wiper relay, 18. Audio amplifier, 19. Multimedia interface ECU, 20. Navigation system ECU, 21. SRS airbag control module, 22. A/C amplifier unit, 23. Right-hand drive (RHD): Double door lock relay.
| Auxiliary Fuse Box (No. 1 in diagram location) | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | — | — |
| 2 | Cruise control, Dynamic Radar Cruise Control, Engine Control Module (ECM), transmission control unit, hybrid control ECU | 10 |
Main fuse box location (LHD models).
Main fuse box location (RHD models).
Main passenger compartment fuse box overview.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Parking lights, license plate lights, high-beam headlights | 10 |
| 2 | Instrument panel illumination, audio system, parking assist system, windshield wiper de-icer, navigation system, fuel filler door release, glove box light, headlight washers, hazard lights, air conditioning, power mirrors, “P” position switch, shift position indicator, heated seats, heated steering wheel, drive mode selector, Pre-Collision System | 10 |
| 3 | Brake control system, multiport fuel injection system (EFI/SFI), Smart Entry & Start System, SRS airbags, stop lights, tail lights | 10 |
| 4 | Instrument cluster | 7.5 |
| 5 | — | — |
| 6 | Windshield wipers | 30 |
| 7 | Rear window wiper and washer | 20 |
| 8 | Windshield washer | 15 |
| 9 | Air conditioning system | 10 |
| 10 | Automatic headlight leveling system, windshield wiper de-icer | 10 |
| 11 | — | — |
| 12 | Windshield wipers, parking assist system, ABS/brakes, navigation system, Electronic Power Steering (EPS), turn signals, hazard lights, yaw rate & G-sensor, headlight washers, power mirrors, drive mode selector, overhead console module, seat belt pretensioners, heated seats, heated steering wheel, Tire Pressure Monitoring System (TPMS), Dynamic Radar Cruise Control | 10 |
| 13 | ABS, air conditioning, automatic light control, power tailgate, instrument cluster, central door locking, double door locking, engine immobilizer, Smart Entry & Start System, front fog lights, headlights, automatic headlight leveling, headlight washers, Hill-start Assist Control (HAC), ambient illumination, interior lights, warning chime, power seats, power windows, rear fog light, power mirror ECU, moonroof, tail lights, anti-theft system, Traction Control (TRC), Vehicle Stability Control (VSC) | 10 |
| 14 | Moonroof | 30 |
| 15 | Rear left power window | 25 |
| 16 | Rear right power window | 25 |
| 17 | — | — |
| 18 | Driver’s power window, power mirrors | 25 |
| 19 | Front passenger’s power window, power mirrors | 25 |
| 20 | — | — |
| 21 | Stop lights, brake control system, Pre-Collision System | 10 |
| 22 | — | — |
| 23 | Rear fog light | 7.5 |
| 24 | Fuel filler door release | 7.5 |
| 25 | OBD-II Diagnostic connector | 7.5 |
| 26 | Driver’s power seat | 30 |
| Left front power seat | 30 | |
| 27 | Front fog lights | 15 |
| 28 | Double door locking system | 25 |
| 29 | Front passenger’s power seat | 30 |
| 30 | Pre-Crash Safety System seat belt pretensioners | 30 |
| 31 | Heated steering wheel | 10 |
| 32 | Central door locking | 25 |
| 33 | Left front seat heater | 10 |
| 34 | — | — |
| 35 | Right front seat heater | 10 |
| 36 | Audio system, navigation system, overhead console module | 7.5 |
| 37 | 12V Auxiliary Power Outlet, Cigarette Lighter | 15 |
| 38 | Air conditioning system, power mirrors | 10 |
| 39 | 12V Auxiliary Power Outlet / Cigarette Lighter Fuse | 15 |
| Relay Box (No. 4 in diagram location) | |
|---|---|
|
|
| No. | Description |
| 1 | Fuel filler door release relay |
| 2 | Rear fog lamp relay |
Luggage Compartment & Body Electronics
Component Location: 1. Moonroof control ECU, 2. Right power mirror ECU, 3. Central door lock receiver, 4. High-current power fuse block, 5. Junction box, 6. 12V Auxiliary battery voltage sensor, 7. Left power mirror ECU.
| High-Current Power Fuse Block (No. 4 in diagram location) | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Fuses: “DC/DC”, “DRL”, “AMP”, “AMP NO. 1”, “AMP NO. 2”, “H-LP HI MAIN”, “EPS”, “ABS MTR 1”, “ABS MTR 2”, “DC/DC-S”, “P/I 2”, “ECU-B2”, “AM2”, “ECU-B3”, “TURN & HAZ”, “P CON MAIN”, “SHORT PIN”, “ABS MAIN NO. 1”, “P-CON MTR”, “MAYDAY”, “ETCS”, “IGCT”, “P/I 1” | 140 |