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I30693
From Back Side:
Connector ”E”
Connector ”D”
Connector ”C”
Connector ”B”
Connector ”A”
–
HEATER & AIR CONDITIONER
AIR CONDITIONING SYSTEM
55–5
2320
Author:
Date:
2002 CAMRY REPAIR MANUAL (RM881U)
Symbols
(Terminal No.)
Specified condition
Condition
TEST
⇔
SG
(A27
⇔
A30)
Ignition switch: ON
Set temp: MAX. HOT
→
MAX. COLD
Below 1 V
→
Above 4 V
A/C
⇔
GND
(A12
⇔
A32)
Ignition switch: ON
Blower switch: ON (Lo, M1, M2, Hi)
A/C switch:OFF
→
ON
Below 2 V
→
Above 6 V
A/CB
⇔
GND
(A4
⇔
A32)
Ignition switch: ON
Blower switch:OFF
→
ON (Lo, M1, M2, Hi)
0
→
10 – 14 V
ACID
⇔
GND
(A13
⇔
A32)
Ignition switch: ON
Blower switch: ON (Lo, M1, M2, Hi)
A/C switch: OFF
→
ON
Open
→
Below 1.0 V
S5
⇔
GND
(A25
⇔
A32)
Ignition switch: LOCK
→
ON
0
→
5.0 V
SG
⇔
Body ground
(A30
⇔
Body ground)
Always
Continuity
TCOL
⇔
GND
(A7
⇔
A32)
Ignition switch: ON
Set temp.: MAX. HOT
→
MAX. COLD
Below 1.0 V
→
10 – 14 V
THOL
⇔
GND
(A8
⇔
A32)
Ignition switch: ON
Set temp.: MAX. COLD
→
MAX. HOT
Below 1.0 V
→
10 – 14 V
FACE
⇔
GND
(A21
⇔
A32)
Ignition switch: ON
Mode select: Except FACE
→
FACE
Below 1.0 V
→
0 V
DEF
⇔
GND
(A17
⇔
A32)
Ignition switch: ON
Mode select: Except DEF
→
DEF
Below 1.0 V
→
0 V
F/D
⇔
GND
(A18
⇔
A32)
Ignition switch: ON
Mode select: Except F/D
→
F/D
Below 1.0 V
→
0 V
FOOT
⇔
GND
(A19
⇔
A32)
Ignition switch: ON
Mode select: Except FOOT
→
FOOT
Below 1.0 V
→
0 V
B/L
⇔
GND
(A20
⇔
A32)
Ignition switch: ON
Mode select: Except B/L
→
B/L
Below 1.0 V
→
0 V
If circuit is as specified, try replacing the controller with a new one. If the circuit is not as specified, inspect
the circuits connected to other parts.
3.
INSPECT ECM
Symbols
(Terminal No.)
Condition
Specified condition
PRE
⇔
Body ground
(B1
⇔
Body ground)
Start engine
Refrigerant pressure: Normally
→
Less than 0.19 Mpa (2.0 kgf
⋅
cm2, 28 psi) or
more than 1.34 Mpa (32 kgf
⋅
cm22, 2,455 psi)
0
→
Below 1.0 V
A/CS
⇔
Body ground
(B31
⇔
Body ground)
Ignition switch: ON
A/C switch: OFF
→
ON
0
→
Below 1.0 V
THR
⇔
E2
(B32
⇔
E28)
Evaporator temp.: 0
C (32
F)
→
15
C (59
F)
2.0 – 2.4
→
1.4 – 1.8 V
A/CI
⇔
Body ground
(B33
⇔
Body ground)
Ignition switch: ON
Magnetic clutch: OFF
→
ON
0
→
Below 1.0 V