Lexus ES300 (2002 year). Service 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
No down-shift (5th
→
4th)
1. Transmission control switch circuit
2. Shift solenoid valve (S4) circuit
3. ECM
No up-shift
(A particular gear, from 1st to 4th gear, is not up-shifted)
1. Shift solenoid valve (SL1, SL2) circuit
2. ECM
No up-shift (4th
→
5th)
1. Transmission control switch circuit
2. Shift solenoid valve (S4) circuit
3. ECM
No lock-up
1. Shift solenoid valve (DSL) circuit
2. ECM
No lock-up off
1. Shift solenoid valve (DSL) circuit
2. ECM
Shift point too high or too low
1. Throttle position sensor circuit
2. Shift solenoid valve (SLT) circuit
3. ECM
Up-shift to 5th from 4th while shift lever is 4 position
1. Transmission control switch circuit
2. ECM
Up-shift to 5th from 4th while engine is cold
1. Engine coolant temp. sensor circuit
2. ECM
Up-shift to 4th from 3rd while shift lever is 3 position
1. Park/neutral position switch circuit
2. ECM
Up-shift to 3rd from 2nd while shift lever is 2 position
1. Park/neutral position switch circuit
2. ECM
Up-shift to 2nd from 1st while shift lever is L position
1. Transmission control switch circuit
2. ECM
Harsh engagement (N
→
D)
1. Shift solenoid valve (SL1) circuit
2. ECM
Harsh engagement (Lock-up)
1. Shift solenoid valve (SL2) circuit
2. ECM
Harsh engagement (Any driving position)
1. Shift solenoid valve (SLT) circuit
2. ECM
Poor acceleration
1. Shift solenoid valve (SLT) circuit
2. ECM
No kick-down
ECM
Engine stalls when starting off or stopping
1. Shift solenoid valve (DSL) circuit
2. ECM
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