Toyota 2002 Camry - Page 858

I30693
From Back Side:
Connector ”E” Connector ”D” Connector ”C” Connector ”B” Connector ”A”
–HEATER & AIR CONDITIONER AIR CONDITIONING SYSTEM
55–5
2320Author: Date:
2002 CAMRY REPAIR MANUAL (RM881U)
Symbols
(Terminal No.)
Specified conditionCondition
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