1996 TOYOTA RAV4 cooling

S01280ECT Switch
CO0BY−01
P05962
Ohmmeter
− COOLINGENGINE COOLANT TEMPERATURE (ECT) SWITCH
CO−25
1996 RAV4 (RM447U)
ENGINE COOLANT
TEMPERATURE (ECT) SWITCH
INSPECTION
1. DRAIN ENGINE COOLANT
2. REMOVE ECT SWITCH
3. INSPECT ECT SWITCH
(a) Using an ohmmeter, check that there is no continuity be-
tween the terminals when the coolant temperature is
above 93°C (199°F).
(b) Using an ohmmeter, check that there is continuity be-
tween the terminals when the coolant temperature is be-
low 83°C (181°F).
If continuity is not as specified, replace the switch.
4. REINSTALL ECT SWITCH
5. REFILL WITH ENGINE COOLANT
6. START ENGINE AND CHECK FOR COOLANT LEAKS

DI3Z8−02
DI−14
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for that code listed
in the table below, for details of each code, turn to the page referred to under the ”See page” for the respec-
tive ”DTC No.” in the DTC chart.
SAE DEFINED
DTC No.
(See Page)Detection ItemTrouble AreaMILMemory
P0105
(DI−21)
Manifold Absolute
Pressure / Barometric
Pressure Circuit
MalfunctionOpen or short in Manifold absolute pressure sensor circuit
Manifold absolute pressure sensor
ECM
 *1
P0106
(DI−24)
Manifold Absolute
Pressure / Barometric
Pressure Circuit
Ranger / Performance
Problem
Manifold absolute pressure sensor *1
P0110
(DI−25)Intake Air Temp. Circuit
MalfunctionOpen or short in take air temp. sensor circuit
Intake air temp. sensor
ECM
 *1
P0115
(DI−29)Engine Coolant Temp. Circuit
MalfunctionOpen or short in engine coolant temp. sensor circuit
Engine coolant temp. sensor
ECM
 *1
P0116
(DI−33)Engine Coolant Temp. Circuit
Range / Performance ProblemEngine coolant temp. sensor
Cooling system *1
P0120
(DI−34)Throttle / Pedal Position
Sensor / Switch ”A” Circuit
MalfunctionOpen or short in throttle position sensor circuit
Throttle position sensor
ECM
 *1
P0121
(DI−38)Throttle / Pedal Position
Sensor / Switch ”A” Circuit
Range / Performance Problem
Throttle position sensor *1
P0125
(DI−39)Insufficient Coolant Temp. for
Closed Loop Fuel ControlOpen or short in oxygen sensor circuit
Oxygen sensor *1
P0130
(DI−42)Oxygen Sensor Circuit Malfunc-
tion
(Bank 1 Sensor 1)Oxygen sensor
Fuel trim malfunction *1
P0133
(DI−45)Oxygen Sensor Circuit Slow
Response
(Bank 1 Sensor 1)
Oxygen sensor *1
P0136
(DI−46)Oxygen Sensor Circuit
Malfunction
(Bank 1 Sensor 2)
Oxygen sensor *1
P0171
(DI−48)System too Lean
(Fuel Trim)
Air Intake (hose loose)
Fuel line pressure
Injector blockage
Oxygen sensor malfunction
Manifold absolute pressure sensor
Engine coolant temp. sensor
 *1
*1: MIL lights up

− DIAGNOSTICSENGINE
DI−33
1996 RAV4 (RM447U)
DTC P0116 Engine Coolant Temp. Circuit Range /
Performance Problem
CIRCUIT DESCRIPTION
Refer to Engine Coolant Temp. Circuit Malfunction on page DI−29.
DTC No.DTC Detecting ConditionTrouble Area
P0116
If THW < −7°C (19.4°F), 20 minutes or more after starting
engine, engine coolant temp. sensor value is 20°C (68°F) or
less
(2 trip detection logic)
Engine coolant temp. sensor
Cooling system
If THW  −7°C (19.4°F), 5 minutes or more after starting
engine, engine coolant temp. sensor value is 20°C (68°F) or
less
(2 trip detection logic)
INSPECTION PROCEDURE
HINT:
If DTC ”P0115” (Engine Coolant Temp. Circuit Malfunction) and ”P0116” (Engine Coolant Temp. Circuit
Range / Performance Problem) are output simultaneously, engine coolant temp. sensor circuit may be open.
Perform troubleshooting of DTC P0115 first.
1 Are there any other codes (besides DTC P0116) being output?
YES Go to relevant DTC chart.
NO
2 Check thermostat (See page CO−11).
NG Replace thermostat.
OK
Replace engine coolant temp. sensor
(See page SF−49).
DI3ZG−01

EM0EK−01
EM−12
− ENGINE MECHANICALIDLE SPEED
1996 RAV4 (RM447U)
IDLE SPEED
INSPECTION
1. INITIAL CONDITIONS
(a) Engine at normal operating temperature
(b) Air cleaner installed
(c) All pipes and hoses of air induction system connected
(d) All vacuum lines properly connected
(e) SFI system wiring connectors fully plugged
(f) All operating accessories switched OFF
(g) Ignition timing check correctly
(h) Transmission in neutral position
(i) Air conditioning switched OFF
2. CONNECT TOYOTA HAND−HELD TESTER OR OBD II SCAN TOOL (See page EM−11)
3. INSPECT IDLE SPEED
(a) Race the engine speed at 2,500 rpm for approx. 90 seconds.
(b) Check the idle speed.
Idle speed (w/ Cooling fan OFF): 750 ± 50 rpm
If the idle speed is not as specified, check the IAC valve and air intake system.
4. DISCONNECT TOYOTA HAND−HELD TESTER OR OBD II SCAN TOOL

S01898
SF0QO−03
S01946
P
E
R
S00037
Ohmmeter
Throttle Position Sensor
VC
VTA
E2
S01901
Disconnect
Plug
− SFITHROTTLE BODY
SF−27
1996 RAV4 (RM447U)
THROTTLE BODY
ON−VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
(a) Check that the throttle linkage moves smoothly.
(b) Check the vacuum at each port.
Start the engine.
Check the vacuum with your finger.
Port nameAt idleOther than idle
PNo vacuumVacuum
ENo vacuumVacuum
RNo vacuumNo vacuum
2. INSPECT THROTTLE POSITION SENSOR
(a) Apply vacuum to the throttle opener.
(b) Disconnect the sensor connector.
(c) Using an ohmmeter, measure the resistance between
each terminal.
Clearance between
lever and stop screwBetween
terminalsResistance
0 mm (0 in.)VTA − E20.2 − 5.7 kΩ
Throttle valve fully
openVTA − E22.0 − 10.2 kΩ
−VC − E22.5 − 5.9 kΩ
(d) Reconnect the sensor connector.
3. INSPECT AND ADJUST THROTTLE OPENER
4. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
5. CHECK IDLE SPEED
Idle speed: 700 ± 50 rpm
6. CHECK AND ADJUST THROTTLE OPENER SETTING
SPEED
(a) Disconnect the vacuum hose from the throttle opener,
and plug the hose end.
(b) Maintain the engine at 2,500 rpm.
(c) Release the throttle valve.
(d) Check that the throttle opener is set.
Throttle opener setting speed:
1,300 − 1,500 rpm (w/ cooling fan OFF)