Lexus ES300 (2002 year). Manual - part 338

0585V-01

C80654

C91969

E10

E9

E8

E7

E6

-

DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

05-403

556

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

TERMINALS OF ECM

Symbols (Terminal No.)

Wiring Color

Condition

STD Voltage (V)

L (E7 8)

E1 (E8 1)

L B

BR

IG switch ON

Shift lever L position

10 - 14

L (E7-8) 

⇔

 E1 (E8-1)

L-B 

⇔

 BR

IG switch ON

Shift lever other than L position

Below 1

2 (E7 9)

E1 (E8 1)

Y

BR

IG switch ON

Shift lever 2 and L position

10 - 14

2 (E7-9) 

⇔

 E1 (E8-1)

Y 

⇔

 BR

IG switch ON

Shift lever other than 2 and L position

Below 1

D (E7 10)

E1 (E8 1)

W L

BR

IG switch ON

Shift lever D and 4 position

10 - 14

D (E7-10) 

⇔

 E1 (E8-1)

W-L 

⇔

 BR

IG switch ON

Shift lever other than D and 4 position

Below 1

R (E7 11)

E1 (E8 1)

R B

BR

IG switch ON

Shift lever R position

10 - 14

R (E7-11) 

⇔

 E1 (E8-1)

R-B 

⇔

 BR

IG switch ON

Shift lever other than R position

Below 1

SPD (E7-17) 

⇔

 E1 (E8-1)

V-W 

⇔

 BR

Vehicle speed 20 km/h (12 mph)

Pulse generation 8

reference

3 (E7 20)

E1 (E8 1)

L W

BR

IG switch ON

Shift lever 3 position

10 - 14

3 (E7-20) 

⇔

 E1 (E8-1)

L-W 

⇔

 BR

IG switch ON

Shift lever other than 3 position

Below 1

4 (E7 23)

E1 (E8 1)

Y B

BR

IG switch ON

Shift lever 4 position

10 - 14

4 (E7-23) 

⇔

 E1 (E8-1)

Y-B 

⇔

 BR

IG switch ON

Shift lever other than 4 position

Below 1

NSW (E9 8)

E1 (E8 1)

G Y

BR

IG ON and shift lever P or N position

Below 1

NSW (E9-8) 

⇔

 E1 (E8-1)

G-Y 

⇔

 BR

IG ON and shift lever other than P or N position

10 - 14

DSL (E9-11) 

⇔

E1 (E8-1)

Y 

⇔

 BR

Vehicle speed 65 km/h (40 mph), lock-up (ON 

⇔

 OFF)

Pulse generation 2

reference

IG switch ON

Below 1

SR (E9-12) 

⇔

 E1 (E8-1)

GR 

⇔

 BR

3rd, 4th or 5th gear

10 - 14

SR (E9 12) 

⇔

 E1 (E8 1)

GR 

⇔

 BR

1st or 2nd gear

Below 1

IG switch ON

Below 1

S4 (E9-13) 

⇔

 E1 (E8-1)

L 

⇔

 BR

5th gear

10 - 14

S4 (E9 13) 

⇔

 E1 (E8 1)

L 

⇔

 BR

Except 5th gear

Below 1

SL3+ (E9-15) 

⇔

 SL3- (E9-14)

G-B 

⇔

 G-R

Engine idle speed

Pulse generation 3

reference

SL2+ (E9-17) 

⇔

 SL2- (E9-16)

L-Y 

⇔

 L-R

Engine idle speed

Pulse generation 4

reference

SL1+ (E9-19) 

⇔

 SL1- (E9-18)

R-B 

⇔

 B-W

Engine idle speed

Pulse generation 5

reference

NC+ (E9-26) 

⇔

 NC- (E9-34)

R 

⇔

 G

Vehicle speed 30 km/h (19 mph): (3rd gear)
Engine speed 1,400 rpm

Pulse generation 6

reference

NT+ (E9-27) 

⇔

 NT- (E9-35)

L 

⇔

 LG

Vehicle speed 20 km/h (12 mph)

Pulse generation 7

reference

C84983

C42677

C53420

C42918

C53416

C42918

C53416

05-404

-

DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

557

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

SLT+ (E10-17) 

⇔

 SLT-

(E10-16)

Y-R 

⇔

 Y-B

Engine idle speed

Pulse generation 1

reference

THO (E10-30) 

⇔

 E2 (E10-28)

G 

⇔

 BR

ATF temperature: 115 

C (239 

F) or more

Below 1.5

Pulse generation 1

Reference:

Irem

Condition

Terminal

SLT+ - SLT-

Tool setting

5V/DIV, 1ms/DIV

Vehicle condition

Engine idle speed

Pulse generation 2

Reference:

Irem

Condition

Terminal

DSL - E1

Tool setting

10V/DIV, 100ms/DIV

Vehicle condition

Vehicle speed 65 km/h (40 mph), lock-up (ON 

⇔

 OFF)

Pulse generation 3

Reference:

Irem

Condition

Terminal

SL3+ - SL3-

Tool setting

5V/DIV, 1ms/DIV

Vehicle condition

Engine idle speed

Pulse generation 4

Reference:

Irem

Condition

Terminal

SL2+ - SL2-

Tool setting

5V/DIV, 1ms/DIV

Vehicle condition

Engine idle speed

C42919

C53417

C93866

C42920

C53419

A05135

C53421

-

DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

05-405

558

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

Pulse generation 5

Reference:

Irem

Condition

Terminal

SL1+ - SL1-

Tool setting

5V/DIV, 1ms/DIV

Vehicle condition

Engine idle speed

Pulse generation 6

Reference:

Irem

Condition

Terminal

NC+ - NC-

Tool setting

1V/DIV, 1ms/DIV

Vehicle condition

Vehicle speed 30 km/h (19 mph): (3rd gear)
Engine speed 1,400 rpm

Pulse generation 7

Reference:

Irem

Condition

Terminal

NT+ - NT-

Tool setting

5V/DIV, 0.5ms/DIV

Vehicle condition

Vehicle speed 20 km/h (12 mph)

Pulse generation 8

Reference:

Irem

Condition

Terminal

SPD - E1

Tool setting

5V/DIV, 20ms/DIV

Vehicle condition

Vehicle speed 20 km/h (12 mph)

0527M-03

05-406

-

DIAGNOSTICS

ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT]

559

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

PROBLEM SYMPTOMS TABLE

HINT:
If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check
the circuits for each symptom in the order given in the charts on the following pages and proceed to the page
given for troubleshooting.
The Matrix Chart is divided into 3 chapters.



If the instruction ”Proceed to next circuit inspection shown on matrix chart” is given in the flow chart
of each circuit, proceed to the circuit with the next highest number in the table to continue the check.



If the trouble still occurs even though there  are no abnormalities in any of the other circuits, check and
replace the ECM.

1.

Chapter 1: Electronic Circuit Matrix Chart

Symptom

Suspect Area

See page

No down-shift
(A particular gear, from 1st to 4th gear, is not up-shifted)

1. Shift solenoid valve (SL1, SL2, SL3, SR) circuit
2. ECM

05-420

01-31

No down-shift (5th 

→

 4th)

1. Transmission control switch circuit
2. Shift solenoid valve (S4) circuit
3. ECM

05-450

05-420

01-31

No up-shift
(A particular gear, from 1st to 4th gear, is not up-shifted)

1. Shift solenoid valve (SL1, SL2) circuit
2. ECM

05-420

01-31

No up-shift (4th 

→

 5th)

1. Transmission control switch circuit
2. Shift solenoid valve (S4) circuit
3. ECM

05-450

05-420

01-31

No lock-up

1. Shift solenoid valve (DSL) circuit
2. ECM

05-433

01-31

No lock-up off

1. Shift solenoid valve (DSL) circuit
2. ECM

05-433

01-31

Shift point too high or too low

1. Throttle position sensor circuit
2. Shift solenoid valve (SLT) circuit
3. ECM

05-18

05-443

01-31

Up-shift to 5th from 4th while shift lever is 4 position

1. Transmission control switch circuit
2. ECM

05-450

01-31

Up-shift to 5th from 4th while engine is cold

1. Engine coolant temp. sensor circuit
2. ECM

05-18

01-31

Up-shift to 4th from 3rd while shift lever is 3 position

1. Park/neutral position switch circuit
2. ECM

05-450

01-31

Up-shift to 3rd from 2nd while shift lever is 2 position

1. Park/neutral position switch circuit
2. ECM

05-450

01-31

Up-shift to 2nd from 1st while shift lever is L position

1. Transmission control switch circuit
2. ECM

05-450

01-31

Harsh engagement (N 

→

 D)

1. Shift solenoid valve (SL1) circuit
2. ECM

05-420

01-31

Harsh engagement (Lock-up)

1. Shift solenoid valve (SL2) circuit
2. ECM

05-420

01-31

Harsh engagement (Any driving position)

1. Shift solenoid valve (SLT) circuit
2. ECM

05-443

01-31

Poor acceleration

1. Shift solenoid valve (SLT) circuit
2. ECM

05-443

01-31

No kick-down

ECM

01-31

Engine stalls when starting off or stopping

1. Shift solenoid valve (DSL) circuit
2. ECM

05-433

01-31