1996 TOYOTA RAV4 coolant

− DIAGNOSTICSENGINE
DI−49
1996 RAV4 (RM447U)
2 Check for oxygen sensor data.
PREPARATION:
(a) Connect the OBDII scan tool or TOYOTA hand−held tester to the DLC3.
(b) Warm up engine to normal operating temperature.
CHECK:
Read the oxygen sensor output voltage and short−term fuel trim.
RESULT:
PatternOxygen sensor output voltageShort−term fuel trim
1Lean condition (Changes at 0.55 V or less)Changes at about +20 %
2Rich condition (Changes at 0.35 V or more)Changes at about −20 %
3Except 1 and 2
3 Check for oxygen sensor
(See page DI−42).
1, 2
3 Check fuel pressure (See page SF−5).
NG Check and repair fuel pump, pressure regulator,
fuel pipe line and filter (See page SF−1).
OK
4 Check injector injection (See page SF−21).
NG Replace injector.
OK
5 Check manifold absolute pressure sensor and engine coolant temp. sensor
(See page DI−21, DI−29).
NG Repair or replace.
OK

− DIAGNOSTICSENGINE
DI−51
1996 RAV4 (RM447U)
DTC P0300 Random / Multiple Cylinder Misfire
Detected
DTC P0301 Cylinder 1 Misfire Detected
DTC P0302 Cylinder 2 Misfire Detected
DTC P0303 Cylinder 3 Misfire Detected
DTC P0304 Cylinder 4 Misfire Detected
CIRCUIT DESCRIPTION
Misfire: The ECM uses the crankshaft position sensor and camshaft position sensor to monitor changes in
the crankshaft rotation for each cylinder.
The ECM counts the number of times the engine speed change rate indicates that misfire has occurred. And
when the misfire rate equals or exceeds the count indicating that the engine condition has deteriorated, the
MIL lights up.
If the misfire rate is high enough and the driving conditions will cause catalyst overheating, the MIL blinks
when misfiring occurs.
DTC No.DTC Detecting ConditionTrouble Area
P0300Misfiring of random cylinder is detected during any particular
200 or 1,000 revolutionsIgnition system
Injector
Fuel line pressure
EGR
Compression pressure
Valve clearance not to specification
Valve timing
Manifold absolute pressure sensor
Engine coolant temp. sensor
P0301
P0302
P0303
P0304
For any particular 200 revolutions of the engine, misfiring is
detected which can cause catalyst overheating
(This causes MIL to blink)
For any particular 1,000 revolutions of the engine, misfiring is
detected which causes a deterioration in emissions
(2 trip detection logic)
HINT:
When the 2 or more codes for a misfiring cylinder are recorded repeatedly but no Random Misfire code is
recorded, it indicates that the misfires were detected and recorded at different times.
DI3ZO−01

DI−54
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
3 Check injector resistance of misfiring cylinder (See page SF−21).
NG Replace injector.
OK
Check for open and short in harness and con-
nector between injector and ECM (See page
IN−30).
4 Check fuel pressure (See page SF−5).
NG Check and repair fuel pomp, pressure regulator,
fuel pipe line and filter (See page SF−1).
OK
5 Check injector injection (See page SF−21).
NG Replace injector.
OK
6 Check EGR system (See page SF−45).
NG Repair EGR system.
OK
7 Check manifold absolute pressure sensor and engine coolant temp. sensor (See
page DI−21, DI−29).

− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−131
1996 RAV4 (RM447U)
4. CHECK FOR INTERMITTENT PROBLEMS
TOYOTA hand−held tester only:
By putting the vehicle’s ECM in check mode, 1 trip detection logic is possible instead of 2 trip detection logic
and sensitivity to detect open circuits is increased. This makes it easier to detect intermittent problems.
(1) Clear the DTCs (See step 3).
(2) Set the check mode (See step 3).
(3) Do simulation test (See page IN−20).
(4) Check the connector connection and terminal (See page IN−30).
(5) Visual check and contact pressure (See page IN−20).
(6) Handle the connector (See page IN−20).
5. PROBLEM SYMPTOM CONFIRMATION
Taking into consideration the results of the customer problem analysis, try to reproduce the symptoms of the
trouble. If the problem is that the transaxle does not up−shift, down−shift, or the shift point is too high or too
low, conduct the following road test to confirm the automatic shift schedule and simulate the problem symp-
toms.
6. ROAD TEST
NOTICE:
Do the test at normal operating ATF temperature 50 − 80°C (122 − 176°F).
(a) D position test.
Shift into the D position, keep the accelerator pedal constant at the full throttle valve opening position
and check the following points:
(1) Check up− shift operation.
Check that 1 → 2, 2 → 3 and 3 → O/D up−shift takes place, at the shift point shown in the automat-
ic shift schedule (See page SS−32).
HINT:
O/D Gear Up−shift Prohibition Control:
Engine coolant temperature is 50°C (122°F) or less.
If there is a 10km/h (6 mph) difference between the set cruise control speed and vehicle speed.
O/D main switch is pushed ON (During the O/D OFF indicator light lights up.).
O/D Gear Lock−up Prohibition Control:
Brake pedal is depressed.
Engine coolant temperature is 50°C (122°F) or less.
(2) Check for shift shock and slip.
Check for shock and slip at the 1 → 2, 2 → 3 and 3 → O/D up−shifts.
(3) Check for abnormal noise and vibration.
Run at the D position lock−up or O/D gear and check for abnormal noise and vibration.
HINT:
The check for the cause of abnormal noise and vibration must be performed very thoroughly as it could also
be due to loss of balance in the torque converter clutch, etc.
(4) Check kick−down operation.
While running in the D position, 2nd, 3rd and O/D gears, check that the possible kick−down ve-
hicle speed limits for 2 → 1, 3 → 2 and O/D → 3 kick−downs conform to those indicated on the
automatic shift schedule (See page SS−32).
(5) Check abnormal shock and slip at kick−down.
(6) Check the lock−up mechanism.
Drive in the D position, O/D gear, at a steady speed (lock−up ON) of about 75 km/h (47
mph).
Lightly depress the accelerator pedal and check that the RPM does not change abruptly.
If there is a big jump in RPM, there is no lock−up.

− DIAGNOSTICSAUTOMATIC TRANSAXLE (A540H)
DI−177
1996 RAV4 (RM447U)
4. CHECK FOR INTERMITTENT PROBLEMS
TOYOTA hand−held tester only:
By putting the vehicle’s ECM in check mode, 1 trip detection logic is possible instead of 2 trip detection logic
and sensitivity to detect open circuits is increased. This makes it easier to detect intermittent problems.
(1) Clear the DTCs (See step 3).
(2) Set the check mode (See step 3).
(3) Do a simulation test (See page IN−30).
(4) Check the connector connection and terminal (See page IN−30).
(5) Visual check and contact pressure (See page IN−30).
(6) Handle the connector (See page IN−30).
5. PROBLEM SYMPTOM CONFIRMATION
Taking into consideration the results of the customer problem analysis, try to reproduce the symptoms of the
trouble. If the problem is that the transaxle does not up−shift, does down−shift, or the shift point is too high
or too low, conduct the following road test to confirm the automatic shift schedule and simulate the problem
symptoms.
6. ROAD TEST
NOTICE:
Perform the test at normal operating ATF temperature 50 − 80°C (122 − 176°F).
(a) D position test in NORM and PWR pattern ranges.
Shift into the D position and hold the accelerator pedal constant at the full throttle valve opening posi-
tion and check the following:
(1) 1 → 2, 2 → 3 and 3 → O/D up−shift should take place, and shift points should conform to those
shown in the automatic shift schedule (See page SS−34).
HINT:
There is not O/D up−shift and lock−up when the engine coolant temperature is below 60°C (140°F).
There is not lock−up when the vehicle speed is 10 km/h (6 mph) less than the set cruise control speed.
ProblemPossible cause
If there is no 1 → 2 up−shiftShift solenoid valve No. 2 stuck
1−2 shift valve is stuck
If there is no 2 → 3 up−shiftShift solenoid valve No. 1 is stuck
2−3 shift valve is stuck
If there is no 3 → O/D up−shift3−4 shift valve is stuck
If the shift point is defectiveThrottle valve, 1−2 shift valve, 2−3 shift valve, 3−4 shift valve etc., are defective
If the lock−up is defectiveShift solenoid valve SL is stuck
Lock−up relay valve is stuck
(2) In the same way, check the shock and slip at the 1 → 2, 2 → 3 and 3 → O/D up−shifts.
Evaluation:
ProblemPossible cause
If the shock is excessive
Line pressure is too high
Accumulator is defective
Check ball is defective
(3) Run at the D position lock−up or O/D gear and check for abnormal noises and vibration.
HINT:
The check for the cause of any abnormal noise and vibration must be made with extreme care as it could
also be due to loss of balance in the drive shaft, tire, torque converter clutch, etc.
(4) While running the D position, 2nd, 3rd and O/D gears, check to see that the possible kick−down
vehicle speed limits for 2 → 1, 3 → 2 and O/D → 3 kick−downs conform to those indicated on
the automatic shift schedule (See page SS−34).
(5) Check for abnormal shock and slip at kick−down.

EC05K−03
S01587
Cap
Filter
S01588
Vacuum
Gauge
S01261
DLC1
TE1
E1SST
S01589
High Vacuum
at 2,500 rpm
Port R
Disconnect HOT EC−8
− EMISSION CONTROLEXHAUST GAS RECIRCULATION (EGR) SYSTEM
1996 RAV4 (RM447U)
INSPECTION
1. INSPECT AND CLEAN FILTER IN EGR VACUUM MOD-
ULATOR
(a) Remove the cap and filter.
(b) Check the filter for contamination or damage.
(c) Using compressed air, clean the filter.
(d) Reinstall the filter and cap.
HINT:
Install the filter with the coarser surface facing the atmospheric
side (outward).
2. INSTALL VACUUM GAUGE
Using a 3−way connector, connect a vacuum gauge to the hose
between the EGR valve and VSV.
3. INSPECT SEATING OF EGR VALVE
Start the engine and check that the engine starts and runs at
idle.
4. CONNECT TERMINALS TE1 AND E1 OF DLC1
Using SST, connect terminals TE1 and E1 of the DLC1
SST 09843−18020
5. INSPECT VSV OPERATION WITH COLD ENGINE
(a) The engine coolant temperature should be below
55°C (131°F).
(b) Check that the vacuum gauge indicates zero at 2,500
rpm.
6. INSPECT OPERATION OF VSV AND EGR VACUUM
MODULATOR WITH HOT ENGINE
(a) Warm up the engine to above 60°C (140°F).
(b) Check that the vacuum gauge indicates low vacuum at
2,500 rpm.
(c) Disconnect the vacuum hose port R of the EGR vacuum
modulator and connect port R directly to the intake man-
ifold with another hose.
(d) Check that the vacuum gauge indicates high vacuum at
2,500 rpm.

EM1B8−02
S01285
S01557
− ENGINE MECHANICALCYLINDER HEAD
EM−33
1996 RAV4 (RM447U)
REMOVAL
1. REMOVE RH ENGINE UNDER COVER
2. DRAIN ENGINE COOLANT
3. A/T only:
DISCONNECT THROTTLE CABLE FROM THROTTLE
BODY
4. DISCONNECT ACCELERATOR CABLE FROM
THROTTLE BODY
5. REMOVE AIR CLEANER CAP AND CASE
6. REMOVE GENERATOR (See page CH−7)
7. REMOVE DISTRIBUTOR
8. REMOVE FRONT EXHAUST PIPE
(a) Using a 14 mm deep socket wrench, remove the 3 nuts
holding the front exhaust pipe to the front TWC.
(b) Remove the 2 bolts holding the front exhaust pipe to the
TWC w/ pipe.
(c) Remove the front exhaust pipe and 2 gaskets.
9. REMOVE EXHAUST MANIFOLD AND HEAT INSULA-
TOR ASSEMBLY
(a) Disconnect the oxygen sensor (bank 1 sensor 1) connec-
tor.
(b) Disconnect the oxygen sensor (bank 1 sensor 2) connec-
tor.
(c) Remove the 6 bolts and manifold upper heat insulator.
(d) Remove the 2 bolts holding the RH exhaust manifold stay
to the cylinder block.
(e) Remove the 6 nuts, the exhaust manifold and heat insula-
tor assembly.

EM−64
− ENGINE MECHANICALCYLINDER HEAD
1996 RAV4 (RM447U)
39. FILL WITH ENGINE COOLANT
40. START ENGINE AND CHECK FOR LEAKS
41. RECHECK ENGINE COOLANT LEVEL AND OIL LEV-
EL
42. INSTALL RH ENGINE UNDER COVER