Lexus ES300 (2002 year). Manual - part 322
056DI-01
I31436
A16
A14
A15
-
DIAGNOSTICS
AIR CONDITIONING SYSTEM
05-465
618
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
TERMINALS OF ECU
HEATER CONTROL HOUSING SUB-ASSY (A/C Amplifier)
Symbols (Terminals No.)
Wiring Color
Condition
STD Voltage (V)
A/CS
⇔
GND
(A14-2
⇔
A15-21)
P-L
⇔
W-B
Ignition switch: ON
A/C switch: OFF
→
ON
Below 1.0 V
→
10 - 14 V
TW
⇔
GND
(A14-4
⇔
A15-21)
Y-G
⇔
W-B
Ignition switch: ON
Pulse generation
AC1
⇔
GND
(A14-6
⇔
A15-21)
Y-B
⇔
W-B
Ignition switch: ON
Magnetic clutch: OFF
→
ON
3.7 - 4.5 V
→
1.3 - 2.6 V
A/CI
⇔
GND
(A14-7
⇔
A15-21)
B
⇔
W-B
Ignition switch: ON
Magnetic clutch: OFF
→
ON
10 - 14 V
→
Below 1.0 V
LP
⇔
GND
(A14-10
⇔
A15-21)
V
⇔
W-B
During set preparation
3 - 5 V
PBEW
⇔
GND
(A14-16
⇔
A15-21)
L-Y
⇔
W-B
Seat belt warning light blinks
Below 1.0 V
→
10 - 14 V
SPD
⇔
GND
(A15-1
⇔
A15-21)
V-W
⇔
W-B
Start engine and turn wheel
Pulse generation
BLW
⇔
GND
(A15-2
⇔
A15-21)
L-O
⇔
W-B
Ignition switch: ON
Blower switch: ON
Pulse generation
HR
⇔
GND
(A15-3
⇔
A15-21)
L-W
⇔
W-B
Ignition switch: ON
Blower switch: OFF
→
ON
10 - 14 V
→
Below 1.0 V
PSW
⇔
GND
(A15-4
⇔
A15-21)
L-B
⇔
W-B
Start engine
Refrigerant pressure: Normally
→
Less than 196 kpa (2.0
kgf/cm
2
, 28 psi) or more than 3,140 kpa (32.0 kgf/cm
2
, 455
psi)
Below 1.0 V
→
0
RDEF
⇔
GND
(A15-5
⇔
A15-21)
Y-G
⇔
W-B
Rear defogger switch: ON
→
OFF
Below 1.0 V
→
10 - 14 V
TAM
⇔
SG-6
(A15-8
⇔
A15-39)
G-R
⇔
W-B
Ignition switch: ON
Ambient temp.: 25
C (77
F)
→
40
C (104
F)
1.35 - 1.75 V
→
0.85 - 1.25 V
TPI
⇔
SG-2
(A15-9
⇔
A15-35)
L-R
⇔
LG-B
Ignition switch: ON
R/F switch: FRESH
→
RECIRCULATION
1.0 V
→
4.0 V
S5-1
⇔
GND
(A15-10
⇔
A15-21)
V
⇔
W-B
Ignition switch: LOCK
→
ON
0
→
5.0 V
B
⇔
GND
(A15-11
⇔
A15-21)
W-R
⇔
W-B
Always
10 - 14 V
IG+
⇔
GND
(A15-12
⇔
A15-21)
L-B
⇔
W-B
Ignition switch: LOCK
→
ON
0
→
10 - 14 V
AMDH
⇔
GND
(A15-13
⇔
A15-21)
B-W
⇔
W-B
Ignition switch: ON
Set temp.: MAX. COOL
→
MAX. HOT (*1)
Below 1.0 V
→
10 - 14 V
AMDC
⇔
GND
(A15-14
⇔
A15-21)
LG-R
⇔
W-B
Ignition switch: ON
Set temp.: MAX. HOT
→
MAX. COOL (*1)
Below 1.0 V
→
10 - 14 V
AMPH
⇔
GND
(A15-15
⇔
A15-21)
LG
⇔
W-B
Ignition switch: ON
Set temp.: MAX. COOL
→
MAX. HOT (*1)
Below 1.0 V
→
10 - 14 V
AMPC
⇔
GND
(A15-16
⇔
A15-21)
L-W
⇔
W-B
Ignition switch: ON
Set temp.: MAX. HOT
→
MAX. COOL (*1)
Below 1.0 V
→
10 - 14 V