Lexus ES300 (2002 year). Manual — part 392
05-166
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
319
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
OBDII scan tool (excluding Hand-held Tester):
1
CHECK OPERATION OF OCV (See page
NG
REPLACE OCV
OK
2
NG
CHECK AND REPLACE ECM
OK
3
CHECK HARNESS AND CONNECTOR(OCV - ECM)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK FOR INTERMITTENT PROBLEMS
A60859
W
7
1
Battery
FL MAIN
W-R
B-G
W-B
Starter
1L
ECM
IF6
Driver
Side
J/B
ALT
EC
2
8
B-Y
B-W
G-Y
W-R
B-G
B-G
1
B-R
1
S2
7
3 1C
B-R
W-B
B-R
1
1
1
1
1
2
3
5
ST1
ST2
AM1
AM2
IF6
5
IF3 3
1
1
1
2
1
2
2
2
2
AM2
AM1
1A
1E
2E
2A
Ignition SW
1K
1H
8
8
1J
1L
9
6
E9 STA
Engine
Room
R/B
7
9
Engine
Room
R/B
Engine
Room
J/B
S3
7
9
8
E9 NSW
Park/
Neutral
Position
SW
Engine
Room
J/B
1K
7
B-W
G-Y
Engine
Room
J/B
G-Y
G-Y
G-Y
B-Y
B-Y
B-Y
ST
Relay
Engine
Room
J/B
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
05-167
320
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
STARTER SIGNAL CIRCUIT
CIRCUIT DESCRIPTION
When the engine is cranked, the intake air flow is slow, so fuel vaporization is poor. A rich mixture is therefore
necessary in order to achieve good startability. While the engine is being cranked, the battery positive volt-
age is applied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection
volume for the starting injection control and after-start injection control.
WIRING DIAGRAM
051MT-11
A53763
STA
E2
05-168
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
321
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
INSPECTION PROCEDURE
HINT:
This diagnostic chart is based on the premise that the engine is cranked normally. If the engine is not
cranked, proceed to the problem symptoms table on page
Hand-held Tester:
1
READ VALUE OF HAND-HELD TESTER(STARTER SIGNAL)
(a)
Turn the ignition switch ON and push the hand-held tester main switch ON.
(b)
Read the STA signal on the hand-held tester while the starter operates.
Result:
Ignition Switch Position
ON
START
STA Signal
OFF
ON
OK
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN ON PROBLEM SYMPTOMS TABLE
NG
2
CHECK HARNESS AND CONNECTOR(ECM - STARTER RELAY)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE ECM
OBDII scan tool (excluding Hand-held Tester):
1
INSPECT ECM
(a)
Measure the voltage between terminal STA and E2 of the
ECM connector during the engine cranking.
Voltage: 6 V or more
OK
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN ON PROBLEM SYMPTOMS TABLE
NG
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
05-169
322
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
2
CHECK HARNESS AND CONNECTOR(ECM - STARTER RELAY)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE ECM
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст