Lexus RX300 (MCU15). Service manual — part 196

DI–16

–

DIAGNOSTICS

ENGINE

LEXUS RX300 (RM785E)

P1133

*2

(DI–90)

A/F Sensor Circuit Response

Malfunction (Bank 1 Sensor 1)

S Open or short in A/F sensor circuit

S A/F sensor

S Air induction system

S Fuel pressure

S Injector

S Engine ECM

f

f

P1135

(DI–94)

A/F Sensor Heater Circuit Mal-

function (Bank 1 Sensor 1)

S Open or short in heater circuit of A/F sensor

S A/F sensor heater

S Engine ECM

f

f

P1150

*2

(DI–85)

A/F Sensor Circuit Range/Perfor-

mance Malfunction (Bank 2 Sen-

sor 1)

S Same as DTC No. P1130

f

f

P1153

*2

(DI–90)

A/F Sensor Circuit Response

Malfunction (Bank 2 Sensor 1)

S Same as DTC No. P1133

f

f

P1155

(DI–94)

A/F Sensor Heater Circuit Mal-

function (Bank 2 Sensor 1)

S Same as DTC No. P1135

f

f

P1300

(DI–96)

Igniter Circuit Malfunction

(No.1)

S Open or short in IGF and IGT1 circuit from ignition coil with

igniter to Engine ECU

S No.1 ignition coil with igniter

S Engine ECU

f

f

P1305

(DI–96)

Igniter Circuit Malfunction

(No.2)

S Open or short in IGF or IGT2 circuit from No.2 ignition coil with

igniter to engine ECU

S No.2 ignition coil with igniter

S Engine ECU

f

f

P1310

(DI–96)

Igniter Circuit Malfunction

(No.3)

S Open or short in IGF and IGT3 circuit from ignition coil with

igniter to Engine ECU

S No.3 ignition coil with igniter

S Engine ECU

f

f

P1315

(DI–96)

Igniter Circuit Malfunction

(No.4)

S Open or short in IGF or IGT4 circuit from No.4 ignition coil with

igniter to engine ECU

S No.4 ignition coil with igniter

S Engine ECU

f

f

P1320/14

(DI–96)

Igniter Circuit Malfunction (No.5)

S Ignition system

S Open or short in IGF or IGT5 circuit from igniter to engine ECU

S Igniter

S Engine ECU

f

f

P1325/14

(DI–96)

Igniter Circuit Malfunction (No.6)

S Ignition system

S Open or short in IGF or IGT6 circuit from igniter to engine ECU

S Igniter

S Engine ECU

f

f

P1335/13

(DI–101)

Crankshaft Position Sensor Cir-

cuit Malfunction (During engine

running)

S Open or short in crankshaft position sensor circuit

S Crankshaft position sensor

S Crankshaft timing pulley

S Engine ECU

–

f

P1346

(DI–102)

VVT Sensor Circuit

Range/Performance Problem

(Bank 1)

S Mechanical system (Jumping teeth of timing belt, belt

stretched)

S Engine ECU

f

f

P1349

(DI–103)

VVT System Malfunction

(Bank 1)

S Valve timing

S OCV

S VVT controller assembly

S Engine ECU

f

f

P1350

(DI–109)

VVT Sensor/Camshaft position

Sensor Circuit Malfunction (Bank

2)

S Open or short in VVT sensor (camshaft position Sensor) circuit

S VVT sensor (camshaft position Sensor)

S Engine ECU

f

f

–

DIAGNOSTICS

ENGINE

DI–17

LEXUS RX300 (RM785E)

P1351

(DI–102)

VVT Sensor/Camshaft position

Sensor Circuit Range/Perfor-

mance Problem (Bank 2)

S Same as DTC No. P1346

f

f

P1354

(DI–103)

VVT System Malfunction (Bank

2)

S Same as DTC No. P1349

f

f

P1520

(DI–111)

Stop Light Switch Signal Mal-

function

S Short in stop light switch signal circuit

S Stop light switch

S Engine ECU

f

f

P1600

(DI–113)

Engine ECU BATT Malfunction

S Open in back up power source circuit

S Engine ECU

f

f

P1645

(DI–115)

Body ECU Malfunction

S Body ECU

S A/C ECU

S Communication bus

–

f

P1651

(DI–116)

VSV for ACIS Circuit Malfunction

(European spec.)

S Open or short in VSV circuit for ACIS

S VSV for ACIS

S Engine ECU

f

f

P1656

(DI–120)

OCV Circuit Malfunction (Bank

1)

S Open or short in OCV circuit

OCV

P1663

(DI–120)

OCV Circuit Malfunction (Bank

2)

S OCV

S Engine ECM

f

f

P1666

(DI–116)

VSV for AICS circuit Malfunction

S Open or short in VSV circuit

S VSV

S Engine ECM

f

f

P1780

(DI–123)

Park/Neutral Position Switch

Malfunction

S Short in park/neutral position switch circuit

S Park/neutral position switch

S Engine ECM

f

f

*

1

: – Check engine warning light does not light up. f Check engine warning light lights up.

*

2

: Europe only

DI68L–13

A14469

Crankshaft
Position
Sensor

Injector

Engine ECU

Throttle Position Sensor

Combination Meter
(Speedometer)

DLC3

Oxygen Sensor
(Bank 1 Sensor 2)

VSV for EVAP

IAC Valve

Ignition Coil
with igniter

Water Tempurature
Sensor

A/F Sensor
(Bank 1 Sensor 1)

Knock
Sensor 1

Fuel Pump

Charcoal
Canister

Park/Neutral Position
Switch

A/F Sensor
(Bank 2 Sensor 1)

VVT Senser
(Bank 2)

OCV (Bank 1)

OCV (Bank 2)

VSV for
No.2 ACIS

VSV for
No.1 ACIS

Knock
Sensor 2

VVT Senser
(Bank 2)

DI–18

–

DIAGNOSTICS

ENGINE

LEXUS RX300 (RM785E)

PARTS LOCATION

DI7O6–02

A02016

31 30 29

28 27

17

19

20

21

22

23

24

25

26

11

12

13

14

1

2

3

4

5

6

7

8

9

10

15

16

18

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

18

8

20

21

22

23

24

17

19

1

2

3

4

5

6

7

9

10

11

12

13

14

15

16

17

1

2

3

4

5

6

7

8

9

10

12 11

13

14

15

16

17

18

19

20

21

23

22

24

26 25

27

28

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

E7

E6

E5

E9

E8

–

DIAGNOSTICS

ENGINE

DI–19

LEXUS RX300 (RM785E)

TERMINALS OF ECU

Symbols (Terminal No.)

Wiring Color

Condition

STD Voltage (V)

BATT (E9–1) – E1 (E7–17)

B–Y ↔ BR

Always

9 – 14

+B (E9–16) – E1 (E7–17)

B–R ↔ BR

IG switch ON

9 – 14

VC (E7–2) – E2 (E7–18)

Y–B ↔ BR

IG switch ON

4.5 – 5.5

VTA1 (E7 23)

E2 (E7 18)

L W ↔ BR

IG switch ON, Throttle valve fully closed

0.3 – 1.0

VTA1 (E7–23) – E2 (E7– 18)

L–W ↔ BR

IG switch ON, Throttle valve fully open

2.7 – 5.2

VG (E7–10) – E2G (E7–19)

Y–R ↔ G–B

Idling, A/C switch OFF

1.1 – 1.5

THA (E7–22) – E2 (E7–18)

L–B ↔ BR

Idling, Intake air temp. 20

°C (68°F)

0.5 – 3.4

THW (E7–14) – E2 (E7–18)

G–W ↔ BR

Idling, Engine coolant temp. 80

°C (176°F)

0.2 – 1.0

STA (E9–7) – E1 (E7–17)

B ↔ BR

Cranking

6.0 or more

IG switch ON

9 – 14

#10 (E7–5) – E01 (E8–21)

W ↔ W–B

Idling

Pulse generation

(See page DI–57)

IG switch ON

9 – 14

#20 (E7–6) – E01 (E8–21)

Y ↔ W–B

Idling

Pulse generation

(See page DI–57)

IG switch ON

9 – 14

#30 (E8–1) – E01 (E8–21)

B ↔ W–B

Idling

Pulse generation

(See page DI–57)

IG switch ON

9 – 14

#40 (E8–2) – E01 (E8–21)

L ↔ W–B

Idling

Pulse generation

(See page DI–57)

IG switch ON

9 – 14

#50 (E8–3) – E01 (E8–21)

R ↔ W–B

Idling

Pulse generation

(See page DI–57)

IG switch ON

9 – 14

#60 (E8–4) – E01 (E8–21)

G ↔ W–B

Idling

Pulse generation

(See page DI–57)

OC1+(E8–6) – OC1– (E8–5)

Y–B ↔ G–W

IG switch ON

Pulse generation

OC2+(E8–29) – OC2–(E8–18)

G–R ↔ G–Y

IG switch ON

Pulse generation

(See page DI–127)

IGT1 (E8–11) – E1 (E7–17)

B–Y ↔ BR

IGT2 (E8–12) – E1 (E7–17)

L–R ↔ BR

IGT3 (E8–13) – E1 (E7–17)

Y–G ↔ BR

IGT4 (E8–14) – E1 (E7–17)

L–Y ↔ BR

Idling

Pulse generation

(See page DI 96)

IGT5 (E8–15) – E1 (E7–17)

Y ↔ BR

g

(See page DI–96)

IGT6 (E8–16) – E1 (E7–17)

G–B ↔ BR

VV2 (E8–22) – E1 (E7–17)

L ↔ BR