1996 TOYOTA RAV4 air condition

71
E 4 (A), E 5 (B), E 6 (C) ENGINE CONTROL MODULE
BATT -E1 : ALWAYS 9.0-14.0 VOLTS
+B -E1 :9.0-14.0 VOLTS (IGNITION SW AT ON POSITION)
VC -E2 :4-5-5.5 VOLTS (IGNITION SW AT ON POSITION)
VTA -E2 :0.3-0.8 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)
:3.2-4.9 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
PIM -E2 :3.3-3.9 VOLTS (IGNITION SW AT ON POSITION)
#10,#20, #30, #40-E01, E02 : 9.0-14.0 VOLTS (IGNITION SW AT ON POSITION)
THA -E2 :0.5-3.4 VOLTS (IGNITION SW ON AND THE INTAKE AIR TEMP 20
C, 68
F)
THW -E2 :0.2-1.0 VOLTS (IGNITION SW ON AND THE COOLANT TEMP 80
C, 176
F)
STA -E1 :6.0-14.0 VOLTS (ENGINE CRANKING)
IGT -E1 :0.8-1.2 VOLTS (ENGINE CRANKING OR IDLING)
W -E1 :9.0-14.0 VOLTS (NO TROUBLE AND ENGINE RUNNING)
ACT -E1 :4.5-5.5 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
AC1 -E1 :0-3.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
ISCO, ISCC-E1 :9.0-14.0 VOLTS (IGNITION SW AT ON POSITION)
TE1 -E1 :9.0-14.0 VOLTS (IGNITION SW ON AND DATA LINK CONNECTOR 1 TE1-E1 NOT CONNECTED)
:0-3.0 VOLTS (IGNITION SW ON AND DATA LINK CONNECTOR 1 TE1-E1 CONNECTED)
NSW -E1 :0-3.0 VOLTS (IGNITION SW ON AND PARK/NEUTRAL POSITION SW P OR N RANGE)
:9.0-14.0 VOLTS (IGNITION SW ON AND PARK/NEUTRAL POSITION SW EXCEPT POSITION P AND N RANGE)
RESISTANCE OF ENGINE CONTROL MODULE WIRING CONNECTOR
(DISCONNECT WIRING CONNECTOR)
VTA -E2 :3.3-10.0 KW (THROTTLE VALVE FULLY OPEN)
:0.2-0.8 KW (THROTTLE VALVE FULLY CLOSED)
VC -E2 :3.0-7.0 KW
THA -E2 :2.0-3.0 KW (INTAKE AIR TEMP 20
C, 68
F)
THW -E2 :0.2-0.4 KW (COOLANT TEMP 80
C, 176
F)
G+ -G- :0.17-0.21 KW
ISCO, ISCC-+B :19.3-22.3 W
(5) CIRCUIT OPENING RELAY
(5) 3 -(5) 5 : CLOSED WITH THE IGNITION SW ON OR ST POSITION
(6) EFI MAIN RELAY
(6) 3-(6) 5 : CLOSED WITH THE IGNITION SW ON OR ST POSITION
E 2 ENGINE COOLANT TEMP. SENSOR
1-2 :14.6-17.8 KW (-20
C, -4
F)
5.88 KW (0
C, 32
F)
2.21-2.69 KW (20
C, 68
F)
1.14 KW (40
C, 104
F)
0.584 KW (60
C, 140
F)
0.29-0.354 KW (80
C, 176
F)
I 5, I 6, I 7, I 8 INJECTOR
1-2 : APPROX. 13.8 W
T 1 THROTTLE POSITION SENSOR
3-1 :0.2-5.7 KW WITH CLEARANCE BETWEEN LEVER AND THE STOP SCREW 0 MM (0 IN.)
3-1 :2.0-10.2 KW WITH THROTTLE VALVE FULLY OPEN
2-1 : LESS THAN 2.3 KW WITH CLEARANCE BETWEEN THE LEVER AND THE STOP SCREW 0.5 MM (0.02 IN.)
WITH CLEARANCE BETWEEN LEVER AND THE STOP SCREW 0.7 MM (0.028 IN.)
SERVICE HINTS

160
AIR CONDITIONING
IH 1 1
IG IB210
W-BB-L B-L
B-L
B-L
B-L B B B-W
B-W B-W
R-B
BR
OO
W-B
W-B
W-B W-B
W-B
FROM POW ER SOURCE SYSTEM (
SEE PAGE 54)
IBLE
K BLOCK
B-L
I 8
B-L
GAUGE
E BLOCK]
-L R-L
L-R50A H TR5FUS
LIN F 7 3
B BA C
JUN CTIO N
CONNECTORB J10 , J11A
R-L
IH 1 22 1
1324
B-W
BLOW ER RESISTORBLOWER MOTORB 4B 3
821
5
6 HI M2 M1
LO BLO WER S W B 5
OFF
10A
[FUS
4F 8
1B 81E 8
R
M
4C 84C1 4B 44C 7 4B 8
34 15
2 4B 74A2
4B 14B5127. 5A A/C HEATER
RELAY4B 9

162
AIR CONDITIONING
HEATER BLOWER MOTOR OPERATION
CURRENT IS APPLIED AT ALL TIMES THROUGH THE HTR FUSE TO TERMINAL 5 OF THE HEATER RELAY.
WHEN THE IGNITION SW IS TURNED ON, CURRENT FLOWS THROUGH THE GAUGE FUSE TO TERMINAL 1 OF THE HEATER RELAY
"THE COIL "TERMINAL 3 "TERMINAL 5 OF THE BLOWER SW.
*LOW SPEED OPERATION
WHEN THE BLOWER SW IS MOVED TO LO POSITION, THE CURRENT FLOWS TO TERMINAL 5 OF THE BLOWER SW "TERMINAL 6
"GROUND, CAUSING THE HEATER RELAY TO SWITCH ON. THIS CAUSES THE CURRENT TO FLOW FROM THE HTR FUSE "
TERMINAL 5 OF THE HEATER RELAY "TERMINAL 4 "TERMINAL 1 OF THE BLOWER MOTOR "TERMINAL 2 "TERMINAL 1 OF
THE BLOWER RESISTOR "TERMINAL 4 "GROUND, CAUSING THE BLOWER MOTOR TO ROTATE AT LOW SPEED.
*MEDIUM SPEED OPERATION (OPERATION AT M1, M2)
WHEN THE BLOWER SW IS MOVED TO M1 POSITION, THE CURRENT FLOWING TO TERMINAL 5 OF THE BLOWER SW "
TERMINAL 6 "GROUND, TURNS THE HEATER RELAY ON. THIS CAUSES THE CURRENT TO FLOW FROM THE HTR FUSE "
TERMINAL 5 OF THE HEATER RELAY "TERMINAL 4 "TERMINAL 1 OF THE BLOWER MOTOR "TERMINAL 2 "TERMINAL 1 OF
THE BLOWER RESISTOR "TERMINAL 2 "TERMINAL 1 OF THE BLOWER SW "TERMINAL 6 "GROUND. THIS TIME, THE
BLOWER RESISTANCE OF THE BLOWER RESISTOR IS LESS THAN AT LOW SPEED, SO THE BLOWER MOTOR ROTATES AT
MEDIUM LOW SPEED.
WHEN THE BLOWER SW IS MOVED TO M2 POSITION, CURRENT FLOWING THROUGH THE MOTOR FLOWS FROM TERMINAL 1 OF
THE BLOWER RESISTOR "TERMINAL 3 "TERMINAL 2 OF THE BLOWER SW "TERMINAL 6 "GROUND. THIS TIME,
RESISTANCE OF THE BLOWER RESISTOR IS LESS THAN AT M1 POSITION, SO THE BLOWER MOTOR ROTATES AT MEDIUM HIGH
SPEED.
*HIGH SPEED OPERATION
WHEN THE BLOWER SW IS MOVED TO HI POSITION, THE CURRENT FLOWS TO TERMINAL 5 OF THE BLOWER SW "TERMINAL 6
"GROUND AND TURNS THE HEATER RELAY ON.
THIS CAUSES THE CURRENT TO FLOW FROM THE HTR FUSE TO TERMINAL 5 OF THE HEATER RELAY "TERMINAL 4 "
TERMINAL 1 OF THE BLOWER MOTOR "TERMINAL 2 "TERMINAL 8 OF THE BLOWER SW "TERMINAL 6 "GROUND, CAUSING
THE BLOWER MOTOR TO ROTATE AT HIGH SPEED.
A 3 A/C DUAL PRESSURE SW
1-4 : OPEN WITH THE PRESSURE LESS THAN 2.0 KG/CM2 (30 PSI, 206 KPA) OR ABOVE 32 KG/CM2 (384 PSI, 2648 KPA)A12 A/C AMPLIFIER
12-5 : CONTINUITY WITH THE A/C CONTROL SW ON AND THE IGNITION SW AT ON POSITION
13-GROUND : ALWAYS CONTINUITY
05-GROUND : ALWAYS CONTINUITY
02-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW ON
A14 A/C THERMISTOR
1-2 : APPROX. 2341
234 W AT 15
C (59
F)
B 4 BLOWER RESISTOR
1-3 : APPROX. 0.4 W
1-2 : APPROX. 1.1 W
1-4 : APPROX. 2.8 W
B 5 BLOWER SW
5-6 : CONTINUITY WITH THE BLOWER SW AT LO, M1, M2 OR HI POSITION
1-6 : CONTINUITY WITH THE BLOWER SW AT M1 POSITION
2-6 : CONTINUITY WITH THE BLOWER SW AT M2 POSITION
8-6 : CONTINUITY WITH THE BLOWER SW AT HI POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A 228B 430I 229
A 328B 530J 331
A1230D 330J 431
A1330E 631J10A31
A1430F 728J11B31
B 330F 831
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
625R/B NO. 6 (ENGINE COMPARTMENT LEFT)
SYSTEM OUTLINE
SERVICE HINTS

K OVERALL ELECTRICAL WIRING DIAGRAM
1
234
20 RAV4
1 AC C
IG 1
IG 2
ST2 AM1
2
AM2
1D 9
1K 4
21D 7
1E 81F 1
1B 84B 74A2
22 1
M 4B 5 4B 1
2IH1 1IH12 1
5 3 66
66
6 EA1
3 IB210
3IG2
11 IB2 4C 7 4C 1 4C 8 4B 8
4
4 87 10 13 14 9 12 2 5 1 2 8
6
IG 2 3 1
1 2 1
4
5 HI M2 M1 LO64 5
15
6
1 I1 0
IG N ITION S W
F 8
10A
GAUGE
[FU S E
BLOCK]
BBB-WB-WB- W
W W R-L L-R
BR-LR-LR-L O
L-R L- B B-R B-R Y
W-RR-Y Y-GB
Y
G-W
L BR BR W-R
L-B
W-BL-Y
L-B
OW-B W-B
W-B W-B
R-B
BR
W
B-L
R-W B-L
B-L
B 4
BLOWER RESISTOR
Power Source Air Conditioning
R ight kick panel 34 B-Y
7. 5A A/C
B 3
BLOWER MOTORB-L
A 3
A/C DUAL PRESSURE SW
L- Y
F 7
FUSIBLE
LINK BLOCK
BATTERY
50A HTR 100A ALT
B 5
BLO W ER SWA13
A/C CONTROL
SW
2 1
A 2
A/C MAGNETIC CLUTCH
AND LOCK SENSOR
A14
A/C THERMISTOR
IG- E IG+ MGC TE SSR- SSR+ LED+ A/C ACT AC1
A12
A/C AMPLIFIER
To E ngine C ontrol
M odule< 2- 2 F rom Ign iter< 5- 4
B-L MG/C RELAY ON
OFF
HEATER
RELAY
40A
AM1
521
43
2 24
G-W
B- L
To FAN NO. 3
Relay< 19-4 B-L
4IG2
12 IB2
BR F rom E ngine C ontrol
Module<2-2
B-L 4B 94B4
BR
A
A
A
J 3
JUNCTION
CONNECTOR
B- L
B-L
1 2B- L
Y D 3
D EFR OSTER
MODE SW
W-B
CA
BB J10 A , J11 B
JU NC TION
CONNECTOR
AAAAAA
BBBCCC JUNCTION CONNECTOR
B J11 G R A YA J10 G R A Y
OFF

− MANUAL TRANSAXLEDIFFERENTIAL LOCKING SYSTEM (4WD)
MX−75
1996 RAV4 (RM447U)
3. INSPECT DIFFERENTIAL LOCK CONTROL SOLE-
NOID
Inspect the differential lock control solenoid.
(1) Disconnect the connector from the solenoid No.1
and No.2.
(2) Check continuity to each port when battery positive
voltage is applied and not applied to the connector
terminals of the solenoid No.1 and No.2.
Solenoid No.1
ConditionPort
Battery positive voltageE1 − Air
No voltageG − E1
Solenoid No.2
ConditionPort
Battery positive voltageF − E2
No voltageE2 − Air
4. INSPECT TRANSFER VACUUM ACTUATOR
(a) Vacuum Tank:
Inspect the transfer vacuum tank.
(1) Disconnect the solenoid hose No.0, No.2 and No.3
from the solenoid.
(2) Fill in the No.3 hose with a plug.
(3) Check that the indicator needle remains steady
when a vacuum of 500 mmHg (19.685 in.Hg) is ap-
plied to the hose No.0.
Standard:
Indicator falls 45 mmHg (1.772 in.Hg) or less during 15
seconds.
(b) Diaphragm (Lock Side):
Inspect the transfer vacuum tank.
(1) Disconnect the solenoid hose No.1 and No.2 from
the solenoid.
(2) Check that the indicator needle remains steady
when a vacuum of 500 mmHg (19.685 in.Hg) is ap-
plied to the hose No.1.
Standard:
Indicator falls 45 mmHg (1.772 in.Hg) or less during 15
seconds.

SF0QT−02
S01261
SST DLC1
E1 TE1
S01904
RSC
RSO+B
Ohmmeter
IAC Valve SF−34
− SFIIDLE AIR CONTROL (IAC) VALVE
1996 RAV4 (RM447U)
IDLE AIR CONTROL (IAC) VALVE
ON−VEHICLE INSPECTION
1. INSPECT IAC VALVE OPERATION
(a) Initial conditions:
Engine at normal operating temperature
Idle speed check correctly
Transmission in neutral position
(b) Using SST, connect terminals TE1 and E1 of the DLC1.
SST 09843−18020
(c) Maintain engine speed in the range between 900 − 1,300
rpm for 5 seconds. Check that it returns to idle speed.
If the engine speed operation is not as specified, check the IAC
valve, wiring and ECM.
(d) Remove the SST.
SST 09843−18020
2. INSPECT IAC VALVE RESISTANCE
NOTICE:
”Cold” and ”Hot” in these sentences express the tempera-
ture of the coils themselves. ”Cold” is from −10°C (14°F) to
50°C (122°F) and ”Hot” is from 50°C (122°F) to 100°C
(212°F).
(a) Disconnect the IAC valve connector.
(b) Using an ohmmeter, measure the resistance between ter-
minal +B and other terminals (RSC, RSO).
Resistance:
Cold: 17.0 − 24.5 Ω
Hot: 21.5 − 28.5 Ω
If resistance is not as specified, replace the IAC valve.
(c) Reconnect the IAC valve connector.

R10958
SR0FE−01
SR−8
− STEERINGAIR CONTROL VALVE
1996 RAV4 (RM447U)
AIR CONTROL VALVE
INSPECTION
INSPECT AIR CONTROL VALVE
(a) Turn the air conditioner switch OFF.
(b) Start the engine and run it at idle.
(c) Full turn the steering wheel.
(d) Check that the engine rpm decreases when the vacuum
hose of the air control valve is pinched.
(e) Check that the engine rpm increases when the hose is re-
leased.