576
LEXUS IS 350 / 250 (EM0140U)
I GROUND POINT
EFI NO. 2 Relay
Front Controller
EFI MAIN Relay
(–S)
IG2 Relay
(–ST)
ST CUT Relay
(E)
A/F Relay
(E)
A3
(SW)
A4
(E)
A1
(SOL–)
E8
(EC)
A5
2B
3
2F
1
2A
7
2
2
2
(FSW–)
A23
(E1)
A27
(E)
A16
(GND3)
A35
A13
(GND)
(GND2)
A14
FAN NO. 2 Relay
(E)
(E)
A19
A18
(E)
(GND1)
A14
J78
(GND1)
AE1
36
2
1
3
4
7
5 4 12 1
2
3
A2 A3
2
W–B
W–B
W–B
W–B
(∗2)
(∗1)
(∗1)
A1
JA2
17
W–B W–B
W–B
W–B
W–B
(∗1) (∗1)
(∗2)
2
3
4
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
6
W–B
W–B
W–B
W–B
(∗3)
Junction
Connector
A20
Junction
Connector
A15
(∗4)
∗ 1 : w/ Vehicle Dynamics Integrated Management
∗ 2 : w/o Vehicle Dynamics Integrated Management
∗ 3 : w/ Adaptive Front–Lighting
∗ 4 : w/ Headlight Cleaner
∗ 5 : 2GR–FSE
∗ 6 : 4GR–FSE
∗ 7 : w/ HID
Skid Control ECU
with Actuator
Wireless Door Lock
Buzzer
Windshield Wiper
Motor
Skid Control ECU
Headlamp Cleaner
Control Relay
Skid Control ECU
with Actuator
Windshield Washer
Motor
Brake Actuator
Water Level
Warning SW
Skid Control ECU
A/C Compressor
Engine Control
Module
Brake Fluid Level
Warning SW
Headlamp Swivel
ECU
Brake Pedal Road
Sensing SW
Junction
Connector
A9
LEXUS IS 350 / 250 (EM0140U)
577
I
(GND)
A34
(E)
B8
(E)
B12
(E)
(E)
(E)
(E)
(E)
B11
A4 A5
W–B
W–B
W–B
(∗5)
(∗6)
B1
(E)
(E)
B13
B2
(E)
(E)
(E)
(E)
(E)
(E)
B4
B1 B2
W–B W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B W–B W–B
W–B W–B W–B W–B
H1 I1
(
Shielded
)
(
Shielded
)
BR
BR
Ab1
3
(∗5)
W–B
(PGND)
A31
B
b1
(GND)
(∗7)
(∗5)
(∗7)
(
Shielded
)
C1
Smog Ventilation
Sensor
Headlamp Assembly
(LH)
Engine Hood
Courtesy SW
Blower Motor
Cooling Fan Motor
(No. 1)
Headlamp Assembly
(RH)
Fog Lamp
(Front LH)
Fog Lamp
(Front RH)
Power Steering
ECU
Blower Motor
578
LEXUS IS 350 / 250 (EM0140U)
I GROUND POINT
(E03)
(ME01)
(E02)
(E01)
(E04)
(E1)
E3, E4, E5, E6
(MGND)
Q49
B9
(SGND)
(GND)
E32
E33
(GND)
(GND)
E35
E22
(GND)
E23
(GND)
(GND)
E24
B
3
B
4
B
7
(Shielded)
(Shielded)
(Shielded)
A
4
A
6
A
5
A
1
(Shielded)
(Shielded)
A
2
A
3
A
7
B
6
B
1
B
11
BA2
12
JA3
55
17
AQ1
A
9
B
10
B
12
E1
AE1 1
E2
BR
BR
BR BR
BR
BR
BR
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
BR
W–B
W–B W–B
BR
W–B
(∗8) (∗8)
(GND)
Z2
Z1
(GND)
W–B
ZE1
1
ZE2
1
W–B
W–B
(∗6)
(∗6)
W–B
W–B
(∗6)
(∗6)
(∗5)
(∗5)
(GND)
E43
W–B BR
B
5
(Shielded)
B
8
(Shielded)
B
9
E8
(SSR–)
BR
BR (Shielded)
2
B
A
12
8
A (E05)
Junction Connector
A10(A), E1(B)
AE1
26
W–B BR
29
AE1
Ignition Coil
(No. 5)
Engine Control Module
Ignition Coil
(No. 1)
Ignition Coil
(No. 3)
Ignition Coil
(No. 6)
Ignition Coil
(No. 4)
Ignition Coil
(No. 2)
Millimeter Wave
Radar Sensor
Canister Pump
Assembly
Ignition Coil
(No. 4)
Ignition Coil
(No. 6)
Engine Oil
Level Sensor
A/C Compressor
LEXUS IS 350 / 250 (EM0140U)
579
I
J24
(ECC)
J43
(E)
J21
(SG)
(GND)
(SGND)
J17
77
38
48
67
57
58
J66
(GND)
J3
BR
W–B
BR
W–B
BR
BR BR
BR
(GND2)
P27
(GND)
(GND)
P31
(E)
u1
(E)
P13
(E)
P33
N8
(E)
(GND)
N1
(SEL1)
(–)
L12
(GND)
L10
(E)
L8
(E)
L9
(GND)
L13
(GND)
n2
Electrical Key
Oscillator
(Front Door RH)
NP1
5
LP1
17
P2
P3
P1
1
PT1
(A/T)
(∗8)
Junction
Connector
J70
W–B
W–B
W–B
Y
W–B
W–B
W–B
W–B
W–B
W–B W–B
W–B W–B
W–B
W–B
W–B
W–B
BR
W–B W–B
W–B
W–B
W–B
1
8
4
7
9
(∗9)
W–B W–B
Junction Connector
P26
∗ 5 : 2GR–FSE
∗ 9 : w/ Seat Position Memory
∗10 : w/o Seat Position Memory
(∗8)
∗ 6 : 4GR–FSE
∗ 8 : w/ Dynamic Radar Cruise Control
W–B
(–)
L14
(∗9)
(∗10)
8
Ln1
W–B
(Shielded) W–B
Spiral Cable
Transmission Control
SW
Data Link
Connector 3
Radio Receiver
Assembly
Distance Control
ECU
Door Control Receiver
Seat Heater (RH)
Stereo Component
Amplifier
Power Outlet
Socket
Certification ECU
Door Lock Assembly
(Rear RH)
Power Window SW
(Rear RH)
Outer Rear
View Mirror (RH)
Outer Mirror
Control ECU (RH)
Door Lock Assembly
(Front RH)
Door Lock
Control SW
Power Window SW
(Front RH)
Outer Rear
View Mirror (RH)
Pu1
1
Rear Window Defogger
(E)
P19
W–B
W–B
(∗11) (∗12) (∗12)
∗11 : w/ Power Seat
∗12 : w/o Power Seat
(∗11)
580
LEXUS IS 350 / 250 (EM0140U)
I GROUND POINT
(GND)
T6
(E)
T8
(GND)
(E)
T3
(GND)
T13
(GND)
T12
(E)
T2
4
5
9
12
10 11
9
8
11
W–B
W–B
W–B
W–B
W–B W–B
W–B
W–B
(∗11)
(∗11)
(∗11)
Junction Connector
T11
(GND)
U13
(GND)
U12
W–B
W–B
W–B
W–B
W–B
10
8
11
(∗11)
(∗11)
(∗11)
(∗11)
Junction
Connector
U11
∗10 : w/o Seat Position Memory
∗ 9 : w/ Seat Position Memory
(E)
U3
9
(∗9)
W–B
(E)
T15
(∗10)
∗11 : w/ Power Seat
∗12 : w/o Power Seat
∗13 : w/ LEXUS Parking Assist (Clearance Sonar)
∗14 : w/ Rear Sunshade
Position Control ECU
and SW (Front RH Seat)
Power Seat SW
(Front RH Seat
Lumbar Support
Control)
Seat Heater (RH)
Seat Climate
Control Blower
(Front RH
Seat Cushion)
Seat Climate
Control Blower
(Front RH
Seat Back)
Front Seat
Inner Belt (RH)
Seat Climate
Control Blower
(Front LH
Seat Back)
Seat Climate
Control Blower
(Front LH Seat
Cushion)
Seat Heater (LH)
Power Seat SW
(Front RH Seat)
(∗11)
(∗11)
(∗11)
(∗11)
(∗11)
10
W–B
(∗11)
Junction Connector
T14
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2012 Lexus IS350 Service & Repair Manual
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Description
If you are in need of a repair manual for your 2012 Lexus IS350, look no further. Our accessible repair manual is the perfect solution for both professional mechanics and DIY enthusiasts. In the past, traditional paper repair manuals were the only option, but now you can access the same comprehensive information in a more affordable and convenient digital format.
Whether you are tackling brake repairs, suspension component replacements, engine troubleshooting, or standard maintenance tasks, this repair manual has you covered. It provides detailed service information for the brakes, engine, suspension, steering, drivetrain, electrical systems, heating, air conditioning, and more.
By utilizing this repair manual , you can save a significant amount of money on vehicle maintenance and repairs. Mechanics often charge high fees for their services, but with this manual, you can confidently work on your own vehicle. The is designed for easy use and is compatible with Windows, Mac computers, smartphones, and tablets.
