4 CT 200h (Cont.

next page)

M OVERALL ELECTRICAL WIRING DIAGRAM

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )

1 2 3 4
(IG) (BAT)

10A 40A G
GAUGE P/I 2 A

SB
2 B
31 2C 1

SB
G
R
B

14 1G 7 1H 9 1G 18 1G 1 1G
LEXUS CT 200h (EM1720E)

IG1 BATT HL4 HNSW HLPR

Integration Relay

GND1 GND2 BCK1 NAV HL4A HL4B BKUP HRNH HRNL HLPL

22 1G 3 1H 3 1G 4 1G 10 1G 11 1G 13 1G 5 1G 6 1G 2 1G
R

32 AH2
W–B

W–B

(∗5)

(∗6)

(∗7)

(∗2)

(∗1)

(∗2)

(∗1)
LG
P

V
L

High Pitched Horn Assembly

Low Pitched Horn Assembly

R

41 HP1
Switch Assembly< 30–2>
Mirror Assembly< 33–4>

ECU Assembly< 14–2>

Control ECU< 9–24>

Power Management

Headlight Assembly LH
2 3 2 3
Headlight Leveling

1 1
LO LO LO LO
Headlight Cleaner
Inner Rear View
G

Assembly RH
Low

Low

Headlight
A1

A3
Low Low
LED (LED) LED (LED)
Driver Driver

A11

A40
10 VP1 E E
Module Module
1 1

Assembly RH
Assembly LH
R

Headlight

Headlight
A47

A48
E IN2 E IN1
W–B

6 2 6 2
R

2 2

W–B

W–B

W–B

W–B
(∗2)

(∗1)

(∗1)

(∗2)

(∗1)

(∗1)
B/U B/U

B
∗
Back–Up

Back–Up

1 : LED Headlight
Assembly RH

Assembly LH

∗ 2 : Halogen Headlight
Rear Light

Rear Light

∗ 5 : w/ Parking Assist (Rear View Monitor)

8 AH2
E E ∗ 6 : w/ Headlight Cleaner
7 AH1
V2

V9

∗ 7 : w/ Headlight Beam Level Control (Automatic)

3 3

B
W–B

W–B

W–B

BR
C
(∗1)

B
W–B

D
(∗1)

A3 V1 A3 A2
 4 CT 200h (Cont' d) (Cont. next page)

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )

5 6 7 8
H16(A), H17(B), H18(C)
(IG) (ACC) Main Body ECU

10A 10A
G ECU–IG1 ECU–
A NO. 1 ACC

SB ACC IG HRLY HORN RLEW LLEW GND2 DIM DRL

B 8 B 21 B 3 B 15 A
29 32 15 28 22
(BAT) (BAT)

20A 22 2C
32 2C 24 2C 33 2A 7. 5A
H–LP HI DRL
MAIN

W–B
(∗1)

(∗1)
SB
G

Y
2 2
LEXUS CT 200h (EM1720E)

1 1

R
B
W G

Sub–Assembly
H30(A), z4(F)

Connector
86 1 1 1 1 56 AH2

Spiral Cable

Junction
9 A

H119

Y
HO
3 2 3 1
36
1 F
DIM DRL
Relay Relay

L
Horn Switch
5 1 5 2

Steering Pad Switch

W–B

Y
1 1 1 1

Assembly
z4(F)
∗ 1 : LED Headlight
∗ 2 : Halogen Headlight

G
Junction Connector
1 1

Connector
1 1 5

Junction
38

A55
H117
10A 10A
H–LP LH HI H–LP RH HI 4
18

G
B
2 2

1 1

Headlight Assembly RH
Headlight Assembly LH
4 A (∗1) 4 A (∗1)

SB

V
1 B (∗2) 1 B (∗2)
6 A (∗1) 6 A (∗1)

A38(B), A48(A)
B B

A9(B), A47(A)
Headlight Assembly RH
Headlight Assembly LH
3 B (∗2) 3 B (∗2)

DRL

DRL
W–B HI HI

A39(A), A41(B)
A8(A), A10(B)
E E

High

High
5 A (∗1) 5 A (∗1)
4 B (∗2) 4 B (∗2)
E E
5 A (∗1) 5 A (∗1)
5 B (∗2) 5 B (∗2)

W–B

W–B
B
C W–B

W–B
(∗1)

BR
D

W–B
(∗1)

H4 A3 A2

M
 4 CT 200h (Cont' d) (Cont. next page)

M OVERALL ELECTRICAL WIRING DIAGRAM

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )
∗ 3 : w/ LEXUS Navigation System

9 10 11 12
H16(A), H17(B), H18(C)
Main Body ECU

MIRB MIRS MIRE RET AMR FFOG RFOG HF HU PKB HEAD A

13 B 14 B 15 B 28 B 27 B 27 A 1 A 8 A 5 A 12 29 A 28 A

20 2C 16 2A

BR
LG

V
2 8

(∗3)
LG

LG
W

W
R

R
P

L
LEXUS CT 200h (EM1720E)

MR MF

Retractable Outer Mirror Switch

MR MAT E

Switch Assembly
1
Unfold

Parking Brake

Display< 36–17>
AUTO

Navigation
Display &
A24

Module
Fold

H137
E
3

8 3 6 4 2 17 11 20 19
M+ MSW E BFG B HF HU H A

W–B
LFG BFG B HF HL HU E T H A EL

Fog Light
Off Flash Off

Dimmer

Light Control
Switch
Switch
Front Low Tail

Switch
Down

Right
Left
Up

Rear High Head

Right

Right
Left

Left

AUTO

LFG EL
Mirror Adjust Switch L R Select Switch 3 H26 12
Headlight Dimmer Switch Assembly
H136
Outer Mirror

G
Switch Assembly L

Connector
97

Junction
L 98

H119
87 36

W–B

W–B

Connector
38

Junction
H117
18

W–B
H4
 4 CT 200h (Cont' d) (Cont. next page)

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )

13 14 15 16
H16(A), H17(B), H18(C)
Main Body ECU

TAIL ACAN BTX BRX HZSW HAZ FFGO RFGO CLTB CLTE CLTS TRLY GSW BZR
30 A 22 B 4 A 16 A 17 B 3 A 13 27 20 A 22 A 21 A 14 24 21
(BAT)
(BAT)
26 2B 47 2A 23 2C

W
R

R
Y

B
L 125A
DC/DC 7. 5A
RR FOG

2 11 HI1 17 HI1 16 HI1

R
LEXUS CT 200h (EM1720E)

LG
1 1D

System< 13–3>
LG 55 2A

and Taillight
W
V

Illumination
Switch Assembly< 11–2>
< 13–1> < 13–2>
Taillight System
Illumination and

Hazard Warning Signal

W
7 3

Assembly< 17–5>
BTX BRX 8 2C 1 2E 6 3 5

LG

Airbag Sensor

Wireless Door Lock Buzzer

CLTB CLTE CLTS
1
LG

4 4

H90 1 5

RR FOG Relay
Option Connector I1
15A Automatic Light
FR FOG TAIL
Control Sensor

A33
Relay
2 AC1 2
2 3

4 4
LG

G
10A
FR FOG TAIL
Relay

66 HP1
LG

LG

Connector
39

Junction

B
Front Fog Light

Front Fog Light

H118
Assembly RH
Assembly LH

2 2
38
13 VP1
7 2B
C1

C2

1 1

BR

B
W–B

W–B

W–B
B

B
4 4

Fog Light

Fog Light

Assembly RH
Assembly LH
Rear Light

Rear Light
Rear

Rear
W–B

V9

V2
3 3

1 AC1

W–B

W–B
W–B

W–B

W–B
A3 V1 A2 A1

M
 4 CT 200h (Cont' d) (Cont. next page)

M OVERALL ELECTRICAL WIRING DIAGRAM

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )
∗ 9 : w/ Intrusion Sensor

17 18 19 20
H16(A), H17(B), H18(C)
Main Body ECU

SSCL L2 UL3 ALTB ACTG BECU GND1 TR+ ACT+ ACT–

18 B 11 A 24 A 31 7 30 11 6 9 8
(BAT) (BAT) (BAT) A

25A 25A
G

V
L

7. 5A
ECU–B DOOR DOOR
NO. 2 NO. 1 D/L BK/DR D/L DR
SOURCE Relay Relay UNLOCK
Relay Relay
2 2
LEXUS CT 200h (EM1720E)

1 1
B

D
R
B

9 2C 18 2C 37 2A 48 2A 6 2B 9 2D 9 2B 1 2B

V
E

V
G
F

Connector
91

Junction
H119

W–B
(∗9)

R
Y

B
81

56 HQ1 1 JH2 2 JH2

B
SB
Y
L 4 1
4 2

Front Door with Motor

L UL

Lock Assembly RH
ACT+ + M
24 HQ1 23 HQ1

Courtesy

Back Door Lock Assembly

M
Unlock Detection

W
E LSSR

J3
L

Junction Connector
8 7
4 5

W–B
CONT +B

LG
84

Q17
ACT– E

H118
3 1
GND 15 JH1
85
2 Q24
Theft Warning

W–B

W–B

W–B
(∗9)
Siren

Y
B

Connector

Connector
6 10 8

Junction

Junction
Connector

3
Junction

Q18

H92
LG
G
Q18

1 7
SB
1 H
Y(∗9)
I
W–B

W–B

W–B

W–B
W–B
J

Q2 H2 Q2 H1
 4 CT 200h (Cont' d) (Cont. next page)

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D ) ∗ 8 : w/o Entry Function

∗ 9 : w/ Intrusion Sensor

21 22 23 24
H16(A), H17(B), H18(C)
Main Body ECU

ACTD LSWL LSWR LSFL LSFR BCTY BDSU +BI L1 SLF+ HCTY
10 5 2 B 7 A 18 A 19 A 23 A 10 A 9 A 12 A 20
A

38 2C

D DR
UNLOCK
Relay

(∗8)
GR

GR

BR
SB

SB

LG
R

R
L
LEXUS CT 200h (EM1720E)

8 2B 5 2B 12 2D 11 2D 25 2D 10 2B 3 2B
3 KH2 4 JH2 76 HQ1 63 HP1 13 JH1 12 JH1 6 AH1

GR
V

LG
P

P
E
G

BR

LG
37 HP1 27 HP1 31 HP1 21 HQ1 45 HQ1 29 HQ1

L
(∗8)
W
F

GR

GR
LG
B

P
L

19 VP1

LG

LG

SB
5 KH2 6 KH2 2 KH2 10 KH2 4 MP1 5 MP1 3 MP1 4 LQ1 5 LQ1 3 LQ1 2 4 2 1
UL L HWM+ +

LG

Engine Hood Courtesy

G

R
V

P
L

(∗8)
SB

Door Control Switch

Unlock
9 10 4 1 4 A 1 A 6 A 4 A 1 A 6 A

Lock
Motor Lock Assembly LH

L UL L UL L UL LSSR L UL LSSR
Rear Door with Motor

Rear Door with Motor

Lock Assembly RH
M M Lock Assembly LH M
Unlock

Switch
Assembly
Front Door with
Lock

Key

A45
HWM– E
Key

Back Door Opener

UL

Switch Assembly
E
3 4

J7
M1(A)

L1(A)
Unlock Detection Unlock Detection Unlock Detection
E LSSR E E
K3

7 8 9 A 9 A

W–B

W–B

W–B
E

V4
W–B

2
LG

W–B

W–B

15 KH1 15 JH1

19 MP1 19 LQ1
W–B

W–B
Connector

W–B
Junction

W–B

W–B
H94

Connector
8

Junction
W–B
(∗8)
7

H92
LG
G 7

SB

W–B
H
Y(∗9) Y(∗9)
I A
W–B

W–B
W–B
J

H3 P1 Q1 V1 H1 A4 A3

M
 4 CT 200h (Cont' d) (Cont. next page)

M OVERALL ELECTRICAL WIRING DIAGRAM

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )
∗ 9 : w/ Intrusion Sensor

25 26 27 28
H16(A), H17(B), H18(C)
Main Body ECU

BCYL FSPT OSPT CSPT ILE SSW1 ISIF

12 C 26 6 C 2 C 1 23 B 12 B

(BAT)

(∗9)

(∗9)
SB

SB

G
Y

V
18 2B 17 2B 27 2B
10A
DOME

G
R
2
LEXUS CT 200h (EM1720E)

1
33 HQ1
24 TH1 15 TH1 14 TH1 2 TH1 3 TH1 5 TH1
R

(∗9)

(∗9)
SB

W
G

G
V

V
L

L
40 2C 49 2A
T6
No. 2 Room Light Assembly

1 5 6 1 Map Light Assembly 26 10

1 1
ILLB ILLB CTY Door SOFF IOUT
L L
22 2D 21 2B 20 2B 21 2D
Off
Off Intrusion Sensor
On
R

Intrusion
Q16

Sensor
Switch
Illumination Light

Illumination Light
2 On Map Light RH
No. 1 Interior

No. 1 Interior
Assembly RH
Assembly LH
Off
G

H34

H14
B B
2 2
55 HQ1 W
On Map Light LH A
R

W
R

+B1 S+B GND1 RILL GND3

No. 1 Room Light Assembly

21 8 15 2 3
1

Y(∗9)

W–B

W–B
(∗9)
R

L
4 TH1 20 TH1 18 TH1 12 TH1 17 TH1

Door
Off
On
Y(∗9)

W–B

W–B

T5
(∗9)
R

L
3 2

Connector
67

Junction

Connector
12

H119

Junction

W
8 TH1

H94
36 68
W
7 B

W–B

W–B

W–B
(∗9)
W

W
Connector
38

Junction
Y(∗9) H117
A 7 TH1
18
W–B

H4 H3
 LEXUS CT 200h (EM1720E)

B
A

W
W
Skid Control ECU with V

13 2B
Actuator Assembly< 16–3>

1
2
2
1
W

T3 T4

1
2
Visor Assembly LH Vanity Light BR BR

35 2D
Assembly LH

34 HP1
FLCY

W
W
4 CT 200h (Cont' d)

P5
Front Door
29

Courtesy Light Switch

1
2
2
1
W
Assembly LH

T1 T2
Visor Assembly RH Vanity Light
Assembly RH

1
4

BR BR
36 2D

53 HQ1
FRCY

Q3
Front Door
Courtesy Light Switch
Assembly RH

1
R G
3 C

74 HP1
LCTY

P12
Rear Door
Courtesy Light Switch
Assembly LH
1

G G
6 A

3 HQ1
RCTY

Q7
Rear Door
Courtesy Light Switch
Assembly RH
30

Outer
Foot Light

7
8
2

12
64

W–B W–B W–B SB R

H3
15 KH1
1 KH2

(∗4) (∗4) (∗4) (∗4) (∗4)

MLP

H94
Junction
Connector
K6
Outer Rear View Mirror
Assembly LH

(∗4)
W–B
Outer
Foot Light

7
8
2

12
65
85

W–B W–B W–B G R R

4 B

H1
15 JH1
3 JH2

–
MILE
Main Body ECU

(∗4) (∗4) (∗4) (∗4) (∗4) (∗4)

MLP

H92 H119
Junction Junction Connector
H16(A), H17(B), H18(C)

Connector
J6
Outer Rear View Mirror
Assembly RH
Illumination and
2 A

Taillight System< 13–3>

PWS
23

Combination Switch BR
51 2A
IND

Assembly< 4–43> < 6–3>

31
M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )

Cleaner Control L
20 B

Relay< 30–2>
HDLO

(∗6)
9 B
CANP
10 B
CANN
14 A
CANH

Multiplex Communication
System (CAN LHD)< 2–7>
13 A
CANL
32

16

P
∗ 4 : w/o Power Seat

26 2D
LIN2
∗ 6 : w/ Headlight Cleaner

P
27 2A

P
P

B
A
(Cont. next page)

M
 4 CT 200h (Cont' d) (Cont. next page)

M OVERALL ELECTRICAL WIRING DIAGRAM

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )

33 34 35 36
K2
(BAT) Front Power Window Regulator Motor Assembly LH (BAT)

25A 25A
D FR DOOR HALL IC M P FR DOOR

14 2A 13 2A
IC
J2
W

Front Power Window Regulator Motor Assembly RH

B GND LED UP DOWN LIN HALL IC M

LEXUS CT 200h (EM1720E)

4 KH2 2 1 5 10 7 9
W–B

R
B

B
L

L IC

W–B
K5
Multiplex Network
12 11 18 20 Master Switch Assembly 15 16 17
GND B LED UP DOWN LIN2 LIN1
B LIN GND LED AUTO UP DOWN
+B 12V 8 JH2 2 9 1 5 4 10 7

W–B

G
P

B
L

L
Down Switch
Driver Side

Driver Side
Up Switch
12V
12V 4 8 6 7
LED AUTO UP DOWN

Regulator Switch Assembly RH

12 KH2 15 KH1 12V

Control ECU

Front Power Window

Sliding Roof
P

< 22–2>
5V
W–B

W–B

11 KH2 11 JH2
GND
Junction Connector

J5
1

Junction Connector

W–B

W–B
H94

7 Control Circuit 1 4 3 12 JH2 15 JH1

H117
Front Passenger

Control Switch

Control Switch
Rear RH Side
Window Lock

Rear LH Side
Auto Switch

W–B

W–B
Driver Side

Door Lock

2 21
Side Control
Unlock

Junction Connector
Lock
Switch
Switch
W–B

Switch

R
P

H92
7

P R
A A
P P
B B

W–B
H3 H4 H1
 4 CT 200h (Cont' d) (Cont. next page)

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )

37 38 39 40
(BAT) (BAT)

25A 25A
DOOR RL DOOR RR

8 2D 3 2A

M2 L2
R

L
Rear Power Window Regulator Motor Assembly LH Rear Power Window Regulator Motor Assembly RH

HALL IC M HALL IC M
LEXUS CT 200h (EM1720E)

IC IC

B LIN GND LED AUTO UP DOWN B LIN GND LED AUTO UP DOWN
30 HP1 2 9 1 5 4 10 7 39 HQ1 2 9 1 5 4 10 7
W–B

W–B
GR

GR
R

R
P

Y
L

L
R

L
6 MP1 9 MP1 4 8 6 7 6 LQ1 9 LQ1 4 8 6 7
LED AUTO UP DOWN LED AUTO UP DOWN

Regulator Switch Assembly RH

Regulator Switch Assembly LH

P
LG

Rear Power Window

Rear Power Window

32 HP1 57 HQ1

GND GND

M3

L3
1 1

R
P

W–B W–B
W–B

W–B
19 MP1 19 LQ1
W–B

W–B
R
A
P
B

W–B W–B

P1 P2 Q1 Q2

M
 LEXUS CT 200h (EM1720E)

L B 2

38 AH2
(BAT)

(∗8) (∗8)
4 CT 200h (Cont' d)

41

7. 5A
ECU–B2

BE
32 2A
(IG)

(∗8)
IGN
10A

71
91
V V
37 2A
(∗8) (∗8)

H119
2

Junction
1

48 2A
18 2C

Connector
(BAT)

(∗8)
7. 5A
ECU–B

84
95

Y Y
17 C
CUTB

(∗8) (∗8)
87
97

BE BE
16 C
IG

(∗8) (∗8)
42

42
92

L B
1 C
+B

(∗8) (∗8)

5
1
32

L L

+B

EFII
(∗8) (∗8)
Power Management
Control ECU< 9–30>

6
R
3
37
96

(∗8) EFIO B B
29 C
LIN

LIN1

(∗8) (∗8)
8

36
37
36

W–B W–B Power Management B

GND

(∗8) (∗8) Control ECU< 9–27> (∗8)

H119 H22
66

Junction ID Code Box Transmission Control B

Connector ECU Assembly< 9–27> (∗8)
H118
Junction
Connector
H143(C), H144(D)

V
M

(∗8)
Certification ECU Assembly
43
M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )

Security Indicator

38
46
15
16
71
91

W–B W–B BR BR
E
2 C

LP
IND

(∗8) (∗8) (∗8) (∗8)

H72
Combination Switch
Assembly
81

Main Body ECU BR

< 4–31> (∗8)
H118
Junction
Connector
18
37
40
99

W–B W–B W–B

E
15 C

H4

(∗8) (∗8) (∗8)

H117
Junction
Connector
98

W–B
(∗8)
9 C
44

CANH

H118
Junction Multiplex Communication
Connector System (CAN LHD)< 2–2>
10 C
CANL
∗ 8 : w/o Entry Function

(∗8)
W–B
A
(Cont. next page)

M OVERALL ELECTRICAL WIRING DIAGRAM

 4 CT 200h (Cont' d) (Cont. next page)

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )

∗ 8 : w/o Entry Function

45 46 47 48

H143(C), H144(D)
Certification ECU Assembly

SWIL AGND CODE TXCT VC5 CLG5 CG5B CLG6 CG6B CLG7 CG7B RCO RDA RSSI
11 C 36 C 13 C 12 C 28 C 7 C 8 C 24 C 25 C 26 C 27 C 5 D 15 D 16 D

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)
GR

BR
G

G
R

R
P

V
L
62 HP1 73 HP1 14 HQ1 15 HQ1 4 HQ1 12 HQ1 13 HQ1

Control ECU< 9–30>

Power Management
LEXUS CT 200h (EM1720E)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)
GR

GR
BR

LG
G

V
Power Source
System< 1–7>

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)

(∗8)
G

G
R

Y
L
7 2 13 12 11 8 10 9 14
SS1 SS2 INDW INDS SWIL AGND CODE TXCT VC5

Door Control Receiver

No. 1 Indoor Electrical Key
1 3 1 3 1 3 4 5 2

Key Antenna Assembly

Key Antenna Assembly

No. 2 Indoor Electrical

No. 3 Indoor Electrical

CLG3 CLGB CLG4 CLGB CLG6 CLGB +5 DATA RSSI
Transponder Key Coil

SS1 SS2 GND

Antenna Assembly
Free
GND

Q8
Full
Traveling 1

Q12
H74

P8
GND

W–B
(∗8)
H78 5
Power Switch
W–B
(∗8)

W–B
A
(∗8)

Q2

M
 4 CT 200h (Cont' d)

M OVERALL ELECTRICAL WIRING DIAGRAM

M u ltip le x C o m m u n ic a tio n S y s te m (B o d y C o n tro l) (L H D )

49 50 51 52
(BAT) (IG)

7. 5A 7. 5A
ECU–B MET

1 44 2A

B
18 2C
LEXUS CT 200h (EM1720E)

BR
7 2D

V
22 21
B IG2

Buzzer

Front Fog

Rear Fog
Master

Beam

Door
I/F

Driver

Combination Meter Assembly

Multi Information
Display

H19
EP E2 CANH CANL
33 9 32 31
W–B

W–B
Connector

Connector

50 57
Junction

Junction
H118

H119

Multiplex Communication
System (CAN LHD)< 2–3>
40 36
W–B

W–B

Connector

37 38
Junction
H117

18
W–B

H4