Lexus ES300 (2002 year). Service manual — part 398

A53763

AICV

E2

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-189

342

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

2

CHECK CHECK VSV(FOR AICV) (See page

13-2

)

NG

REPLACE INTAKE AIR CONTROL VALVE ASSY
NO.3

OK

3

CHECK HARNESS AND CONNECTOR(COMPUTRE RELAY - ECM)

NG

REPAIR OR REPLACE HARNESS AND
CONNECTOR

OK

CHECK AND REPLACE ECM

OBDII scan tool (excluding Hand-held Tester):

1

CHECK VSV(FOR - AICV) (See page

13-2

)

NG

REPLACE INTAKE AIR CONTROL VALVE ASSY
NO.3

OK

2

INSPECT ECM

(a)

Turn the ignition switch ON.

(b)

Measure the voltage between terminals AICV and E2 of
the ECM E8 and E9 connector.
Voltage: 9 - 14 V

NG

CHECK HARNESS AND CONNECTOR

OK

3

INSPECT VACUUM TANK

NG

REPAIR OR REPLACE

OK

CHECK AND REPLACE ECM

051SE-07

A53766

E10

E9

E8

E7

E6

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-27

180

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

TERMINALS OF ECM

Symbols (Terminal No.)

Wiring Color

Condition

STD Voltage (V)

BATT (E7-2) - E1 (E8-1)

B-Y - BR

Always

9 - 14

+BM (E7-6) - ME01 (E8-4)

L-R - W-B

Always

9 - 14

IGSW (E6-9) - E1(E8-1)

B-O - BR

Always

9 - 14

+B (E6-1) - E1 (E8-1)

B-R - BR

IG switch ON

9 - 14

VC (E10-18) - E2 (E10-28)

Y - BR

IG switch ON

4.5 - 5.5

VTA1 (E10-21) - E2 (E10-28)

LG - BR

IG switch ON, Throttle valve fully closed

0.4 - 1.0

VTA1 (E10-21) - E2 (E10-28)

LG - BR

IG switch ON, Throttle valve fully open

3.2 - 4.8

VTA2 (E10-31) - E2 (E10-28)

B-R - BR

IG switch ON, Accelerator pedal fully closed

2.0 - 2.9

VTA2 (E10-31) - E2 (E10-28)

B-R - BR

IG switch ON, Accelerator pedal fully open

4.6 - 5.0

M+ (E8-3) - E01 (E10-7)
M- (E8-2) - E01 (E10-7)

B - W-B

W - W-B

Idling

Pulse generation

VG (E9-24) - E2G (E9-32)

R - L-W

Idling, A/C switch OFF

1.1 - 1.5

VPA (E6-22) - EPA (E6-28)

L-Y - LG-B

IG switch ON, Accelerator pedal fully closed

0.5 - 1.1

VPA (E6-22) - EPA (E6-28)

L-Y - LG-B

IG switch ON, Accelerator pedal fully open

3.0 - 4.6

VPA2 (E6-23) - EPA2 (E6-29)

W-R - LG

IG switch ON, Accelerator pedal fully closed

0.9 - 2.3

VPA2 (E6-23) - EPA2 (E6-29)

W-R - LG

IG switch ON, Accelerator pedal fully open

3.4 - 5.0

VCPA (E6-26) - EPA (E6-28)

R - LG-B

IG switch ON

4.5 - 5.5

VCP2 (E6-27) - EPA2 (E6-29)

B-R - LG

IG switch ON

4.5 - 5.5

NE+ (E10-27) - NE- (E10-34)

R - G

Idling

Pulse generation

(See page

05-80

)

VV1+ (E8-27)

- NE- (E10-34)

Y - G

Idling

Pulse generation

(See page

05-83

)

VV2+ (E8-26)

- VV2- (E8-31)

L-Y - L-B

Idling

Pulse generation

(See page

05-83

)

OC1+ (E8-16) - OC1- (E8-15)

G-B - G-R

IG switch ON

Pulse generation

(See page

05-164

)

OC2+ (E8-14) - OC2- (E8-13)

L-R - L-W

IG switch ON

Pulse generation

(See page

05-164

)

THA (E10-20) - E2 (E10-28)

L-B - BR

Idling, Intake air temp. 20

°

C (68

°

F)

0.5 - 304

THW (E10-19) - E2 (E10-28)

G-B - BR

Idling, Engine coolant temp. 80

°C (176°F)

0.2 - 1.0

STA (E9-9) - E1 (E8-1)

B-Y - BR

Cranking

6.0 or more

#10 (E10-1) - E01 (E10-7)

L - W-B

IG switch ON

9 - 14

#10 (E10-1) - E01 (E10-7)

L - W-B

Idling

Pulse generation

#20 (E10-2) - E01 (E10-7)

R - W-B

IG switch ON

9 - 14

#20 (E10-2) - E01 (E10-7)

R - W-B

Idling

Pulse generation

#30 (E10-3) - E01 (E10-7)

Y - W-B

IG switch ON

9 - 14

#30 (E10-3) - E01 (E10-7)

Y - W-B

Idling

Pulse generation

#40 (E10-4) - E01 (E10-7)

W - W-B

IG switch ON

9 - 14

#40 (E10-4) - E01 (E10-7)

W - W-B

Idling

Pulse generation

#50 (E10-5) - E01 (E10-7)

R-L - W-B

IG switch ON

9 - 14

#50 (E10-5) - E01 (E10-7)

R-L - W-B

Idling

Pulse generation

05-28

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

181

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

#60 (E9-5) - E01 (E10-7)

G - W-B

IG switch ON

9 - 14

#60 (E9-5) - E01 (E10-7)

G - W-B

Idling

Pulse generation

IGT1 (E10-8) - E1 (E8-1)

R-W - BR

Idling

Pulse generation

(See page

05-143

)

IGT2 (E10-9) - E1 (E8-1)

P - BR

Idling

Pulse generation

(See page

05-143

)

IGT3 (E10-10) - E1 (E8-1)

LG-B - BR

Idling

Pulse generation

(See page

05-143

)

IGT4 (E10-11) - E1 (E8-1)

L-Y - BR

Idling

Pulse generation

(See page

05-143

)

IGT5 (E10-12) - E1 (E8-1)

G-R - BR

Idling

Pulse generation

(See page

05-143

)

IGT6 (E10-13) - E1 (E8-1)

L - BR

Idling

Pulse generation

(See page

05-143

)

IGF (E10-23) - E1 (E8-1)

W-R - BR

IG switch ON

4.5 - 5.5

IGF (E10-23) - E1 (E8-1)

W-R - BR

Idling

Pulse generation

(See page

05-143

)

ACIS (E10-15) - E01 (E10-7)

R-Y - W-B

IG switch ON

9 - 14

ACI1 (E10-14) - E01 (E10-7)

Y-G - W-B

IG switch ON

9 - 14

AICV (E10-25) - E01 (E10-7)

W - W-B

IG switch ON

9 - 14

ACM1 (E10-24) - E01 (E10-7)

B-L - W-B

IG switch ON

9 - 14

FC (E6-10) - E01 (E10-7)

G-R - W-B

IG switch ON

9 - 14

FC (E6-10) - E01 (E10-7)

G-R - W-B

Idling

0 - 3

EVP1 (E8-11) - E01 (E10-7)

LG - W-B

IG switch ON

9 - 14

CCV (E8-12) - E01 (E10-7)

L - W-B

IG switch ON

9 - 14

KNKR (E9-1) - E1 (E8-1)

B - BR

Idling

Pulse generation

(See page

05-77

)

KNKL (E9-2) - E1 (E8-1)

W - BR

Idling

Pulse generation

(See page

05-77

)

NSW (E9-8) - E1 (E8-1)

G-Y - BR

IG switch ON, Other shift position in P, N

9 - 14

NSW (E9-8) - E1 (E8-1)

G-Y - BR

IG switch ON, Shift position in P, N

0 - 3

TACH (E6-5) - E1 (E8-1)

B-O - BR

Idling

Pulse generation

TBP (E6-4) - E01 (E10-7)

V - W-B

IG switch ON, Disconnect vacuum hose from vapor pressure
sensor

9 - 14

PTNK (E6-21) - E2 (E10-28)

P - BR

IG switch ON

2.9 - 3.7

PTNK (E6-21) - E2 (E10-28)

P - BR

IG switch ON, Apply vacuum 4.0 kPa (30 mmHg, 1.18 in.Hg)

0.5 or less

SIL (E6-18) - E1 (E8-1)

W - BR

During transmission

Pulse generation

STP (E7-19) - E1 (E8-1)

G-W - BR

IG switch ON, Brake pedal depressed

7.5 - 14

STP (E7-19) - E1 (E8-1)

G-W - BR

IG switch ON, Brake pedal released

0 - 1.5

AFR+ (E9-22) - E1 (E8-1)

BR - BR

IG switch ON

3.0 - 3.6

AFL+ (E9-23) - E1 (E8-1)

O - BR

IG switch ON

2.7 - 3.3

AFR- (E9-30) - E1 (E8-1)

B-R - BR

IG switch ON

3.0 - 3.6

AFL- (E9-31) - E1 (E8-1)

W - BR

IG switch ON

2.7 - 3.3

OX1B (E9-21) - E1 (E8-1)

W - BR

Maintain engiene speed at 2,500 rpm for 90 sec. after warming
up

Pulse generation

OX2B (E9-29) - E1 (E8-1)

B - BR

Maintain engiene speed at 2,500 rpm for 90 sec. after warming
up

Pulse generation

HAFR (E9-4) - E04 (E9-7)

B-W - W-B

Idling

Below 3.0

HAFL (E9-3) - E05 (E9-6)

B-R - W-B

IG switch ON

9 - 14

KSW (E7-34) - E1 (E8-1)

L - BR

At time of inserting key

Below 1.5

KSW (E7-34) - E1 (E8-1)

L - BR

In condition without key inserted

4 - 5

RXCK (E7-27)

*1

- E1 (E8-1)

R-L - BR

At time of inserting key

Pulse generation

CODE (E7-15)

*1

- E1 (E8-1)

G-W - BR

At time of inserting key

Pulse generation

TXCT (E7-26)

*1

- E1 (E8-1)

L-Y - BR

At time of inserting key

Pulse generation

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-29

182

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

IMLD (E7-16) - E1 (E8-1)

V - BR

In condition without key inserted

Pulse generation

MREL (E6-8) - E1 (E8-1)

B-W - BR

IG switch ON

9 - 14

SPD (E7-17) - E1 (E8-1)

V-W - BR

IG switch ON, Rotate driving sheel slowly

0 - 5

W (E6-12) - E01 (E10-7)

G-R - W-B

IG switch ON

Below 3.0

PS (E8-10) - E1 (E8-1)

R-W - BR

IG switch ON

9 - 14

HT1B (E8-6) - E03 (E8-7)
HT2B (E8-5) - E03 (E8-7)

L - W-B

Y - W-B

Idling

9 - 14

HT1B (E8-6) - E03 (E8-7)
HT2B (E8-5) - E03 (E8-7)

L - W-B

Y - W-B

IG switch ON

Below 3.0

TC (E6-11) - E1 (E8-1)

P-B - BR

IG switch ON

9 - 14

ACMG (E7-3) - E1 (E8-1)

L-W - BR

A/C switch ON (At Idling)

Below 3.0

ACMG (E7-3) - E1 (E8-1)

L-W - BR

A/C switch OFF

9 - 14

A/CS (E7-31) - E1 (E8-1)

P-L - BR

IG switch ON, A/C switch ON

9 - 14

A/CI (E7-33) - E01 (E10-7)

B - W-B

IG switch ON, A/C switch OFF

9 - 14

ENG+ (E6-24)

- ENG- (E6-30)

TRC+ (E6-25)

- TRC- (E6-31)

W-B

G-L

Idling

Pulse generation

*1: w/ Engine Immobiliser System.