Lexus ES300 (1997 year). Manual — part 361
W03887
Instrument Panel J/B
Absorber Control ECU
Switch
Junction
Connector
Ignition
Battery
FL BLOCK
J3
A24
1
2
+B
1
GND
2
FL MAIN
A24
1B
II
Junction
Connector
J15
1K
F11
F6
F11
AM1
W–B
B–R
W–B
B–R
ECU–IG
A
B–R
B–Y
W
1
2
1K
1J
1
2
1
2
Instrument Panel J/B
B–R
B–R
1
B–G
B–G
A
A
A
2
1
2
4
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
DI–221
373
1997 LEXUS ES300 (RM511U)
Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the absorber control ECU, hence the absorber control actuator.
WIRING DIAGRAM
INSPECTION PROCEDURE
1
Check battery positive voltage.
OK:
Voltage: 10 – 14 V
NG
Charge or replace battery.
OK
DI0AP–01
W03878
AB0119
F00258
+B
(+)
(–)
ON
W03879
(+)
GND
(–)
DI–222
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
374
1997 LEXUS ES300 (RM511U)
2
Check voltage between terminal +B of absorber control ECU connector and body
ground.
PREPARATION:
(a)
Remove the No.1 lower panel (See page
).
(b)
Turn the ignition switch ON.
CHECK:
Measure voltage between terminal +B of absorber control ECU
and body ground.
OK:
Voltage: 10 – 14 V
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page
NG
3
Check continuity between terminal GND of absorber control ECU connector and
body ground.
CHECK:
Measure continuity between terminal GND of absorber control
ECU connector and body ground.
OK:
Continuity
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page
NG
N20675
ECU–IG
Instrument Panel J/B
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
DI–223
375
1997 LEXUS ES300 (RM511U)
4
Check ECU–IG fuse.
PREPARATION:
Remove ECU–IG fuse from instrument panel J/B.
CHECK:
Check continuity of ECU–IG fuse.
OK:
Continuity
NG
Check for short in all the harness and compo-
nents connected to ECU–IG fuse (See attached
wiring diagram).
OK
Check for open in harness and connector between absorber control ECU and battery
(See page
).
W03894
Absorber Control ECU
Junction
P
TEM
BR
Connector
J24
IK3
E1
A24
BR
BR
Junction
Connector
BR
B
C
A
A
TEM
J9
J8
DLC2
4
6
15
3
ED
F00288
E1
ON
TEM
DLC2
DI–224
–
DIAGNOSTICS
ELECTRIC MODULATED SUSPENSION
376
1997 LEXUS ES300 (RM511U)
TEM Terminal Circuit
CIRCUIT DESCRIPTION
By connecting LED to the between terminals TEM and E1 of DLC2, a TEM output check can be performed
(See page
WIRING DIAGRAM
INSPECTION PROCEDURE
1
Check voltage between terminals TEM and E1 of DLC2.
CHECK:
Measure the voltage between terminals TEM and E1 of DLC2
for 2 sec. after the ignition switch is ON.
OK:
Voltage: 10 – 14 V
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page
NG
DI0AQ–01
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