1996 TOYOTA RAV4 valve clearance

− DIAGNOSTICSENGINE
DI−15
1996 RAV4 (RM447U) DTC No.
(See Page)
Detection ItemTrouble AreaMILMemory
P0172
(DI−48)System too Rich
(Fuel Trim)
Fuel line pressure
Injector blockage, leak
Oxygen sensor malfunction
Manifold absolute pressure sensor
Engine coolant temp. sensor
 *1
P0300
(DI−51)Random / Multiple
Cylinder Misfire DetectedIgnition system
Injector
Fuel line pressure
EGR
Compression pressure
Valve clearance not to specification
Valve timing
Manifold absolute pressure sensor
Engine coolant temp. sensor
 *2P0301
P0302
P0303
P0304
(DI−51)Misfire Detected
− Cylinder 1
− Cylinder 2
− Cylinder 3
− Cylinder 4
P0325
(DI−56)Knock Sensor 1 Circuit
MalfunctionOpen or short in knock sensor 1 circuit
Knock sensor 1 (looseness)
ECM
 *1
P0335
(DI−59)Crankshaft Position Sensor
”A” Circuit Malfunction
Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Starter
ECM
 *1
P0336
(DI−62)Camshaft Position Sensor
Circuit Range / PerformanceDistributor
ECM malfunction (for back up) *1
P0340
(DI−63)Camshaft Position Sensor
Circuit Malfunction
Open or short in camshaft position sensor circuit
Camshaft position sensor
Starter
ECM
 *1
P0401
(DI−65)Exhaust Gas Recirculation
Flow Insufficient Detected
EGR valve stuck close
Open or short in VSV circuit for EGR
Vacuum or EGR hose disconnected
Manifold absolute pressure sensor
EGR VSV open or close malfunction
ECM
 *1
P0402
(DI−71)Exhaust Gas Recirculation
Flow Excessive Detected
EGR valve stuck open
Vacuum or EGR hose is connected to wrong post
Manifold absolute pressure sensor
ECM
 *1
P0420
(DI−73)Catalyst System Efficiency
Below ThresholdThree−way catalytic converter
Open or short in oxygen sensor circuit
Oxygen sensor
 *1
P0440
(DI−76)Evaporative Emission Control
System Malfunction
Vapor pressure sensor
Fuel tank cap incorrectly installed
Fuel tank cap cracked or damaged
Vacuum hose cracked, holed, blocked, damaged or
disconnected
Hose or tube cracked, holed, damaged or loose
Fuel tank cracked, holed, or damaged
Charcoal canister cracked, holed or damaged
 *1
*1: MIL lights up
*
2: MIL lights up or blinking

− 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

− DIAGNOSTICSENGINE
DI−55
1996 RAV4 (RM447U)
NG Repair or replace.
OK
Check the compression pressure (See page EM−3), valve clearance (See page EM−5) and valve
timing (See page EM−19).

EM−2
− ENGINE MECHANICALCO/HC
1996 RAV4 (RM447U)
6. TROUBLESHOOTING
If the CO/HC concentration does not comply with regulations,
troubleshoot in the order given below.
(a) Check the oxygen sensor operation (See page DI−42).
(b) See the table below for possible causes, then inspect and
correct the applicable causes if necessary.
HCCOProblemsCauses
HighNormalRough idle4. Faulty ignitions:
Incorrect timing
Fouled, shorted or improperly gapped plugs
Open or or crossed high−tension cords
Cracked distributor cap
5. Incorrect valve clearance
6. Leaky EGR valve
7. Leaky intake and exhaust valves
8. Leaky cylinder
HighLowRough idle
(Fluctuating HC reading)1. Vacuum leaks:
PCV hose
EGR valve
Intake manifold
Throttle body
IAC valve
Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)1. Restricted air filter
2. Faulty SFI system:
Faulty pressure regulator
Clogged fuel return line
Defective ECT sensor
Defective IAT sensor
Faulty ECM
Faulty injector
Faulty throttle position sensor
MAP sensor

EM0EI−02
S01653
21
S01367
− ENGINE MECHANICALVALVE CLEARANCE
EM−5
1996 RAV4 (RM447U)
VALVE CLEARANCE
INSPECTION
HINT:
Inspect and adjust the valve clearance when the engine is cold.
1. DISCONNECT PS RESERVOIR
2. REMOVE CYLINDER HEAD COVER
(a) Disconnect the accelerator cable from the throttle body.
(b) Disconnect the accelerator cable from the clamp on the
intake manifold.
(c) Disconnect the accelerator cable from the clamp on the
generator bracket.
(d) Disconnect the A/T throttle control cable from the throttle
body.
(e) Disconnect the PCV hose from the air cleaner hose.
(f) Disconnect the PCV hose from the intake manifold.
(g) Disconnect the high−tension cords from the spark plugs.
(h) Remove the 2 bolts, and disconnect the accelerator cable
bracket from the intake manifold.
(i) Disconnect the engine wire protector from the 2 mounting
bolts of the No. 2 timing belt cover in the sequence shown.
(j) Remove the 4 nuts, grommets, cylinder head cover and
gasket.
HINT:
Arrange the grommets in the correct order, so that they can be
reinstalled into their original positions. This minimizes any pos-
sibility of oil leakage due to reuse of the grommets in different
positions.

P25455
Turn
P03443
1
1
2
2
1
13
3
P03442
2 233 44
44
P13927
Upward
Cam Lobe
Spark Plug SideNotch EM−6
− ENGINE MECHANICALVALVE CLEARANCE
1996 RAV4 (RM447U)
3. SET NO. 1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley and align its groove with timing
mark ”0” of the No. 1 timing belt cover.
(b) Check that the valve lifters on the No.1 cylinder are loose
and valve lifters on the No.4 are tight.
If not, turn the crankshaft 1 revolution (360°) and align the mark
as above.
4. INSPECT VALVE CLEARANCE
(a) Check only the valves indicated.
Using a feeler gauge, measure the clearance be-
tween the valve lifter and camshaft.
Record the out−of−specification valve clearance
measurements. They will be used later to determine
the required replacement adjusting shim.
Valve clearance (Cold):
Intake0.19 − 0.29 mm (0.007 − 0.011 in.)
Exhaust0.28 − 0.38 mm (0.011 − 0.015 in.)
(b) Turn the crankshaft 1 revolution (360°) and align the mark
as above (See procedure in step 3).
(c) Check only the valves indicated as shown. Measure the
valve clearance (See procedure in step (a)).
5. ADJUST VALVE CLEARANCE
(a) Remove the adjusting shim.
Turn the crankshaft so that the cam lobe of the cam-
shaft on the adjusting valve points upward.
Position the notch of the valve lifter facing the spark
plug side.

P13988Spark Plug Side SST (A)
SST (B)
P13926
Magnetic
Finger
EM0494
P13989
SST (A)
SST (B)
− ENGINE MECHANICALVALVE CLEARANCE
EM−7
1996 RAV4 (RM447U)
Using SST (A), press down the valve lifter and place
SST (B) between the camshaft and valve lifter. Re-
move SST (A).
SST 09248−55040 (09248−05410, 09248−05420)
HINT:
Apply SST (B) at slight angle on the side marked with ”9”, at the
position shown in the illustration.
Remove the adjusting shim with a small screwdriver
and magnetic finger.
(b) Determine the replacement adjusting shim size by follow-
ing the Formula or Charts:
Using a micrometer, measure the thickness of the
removed shim.
Calculate the thickness of a new shim so that the
valve clearance comes within specified value.
T ........... Thickness of removed shim
A ........... Measured valve clearance
N ........... Thickness of new shim
Intake: N = T + (A − 0.24 mm (0.009 in.))
Exhaust: N = T + (A − 0.33 mm (0.013 in.))
Select a new shim with a thickness as close as pos-
sible to the calculated value.
HINT:
Shims are available in 17 sizes in increments of 0.05 mm
(0.0020 in.), from 2.50 mm (0.0984 in.) to 3.30 mm (0.1299 in.).
(c) Install a new adjusting shim.
Place a new adjusting shim on the valve lifter.
Using SST (A), press down the valve lifter and re-
move SST (B).
SST 09248−55040 (09248−05410, 09248−05420)
(d) Recheck the valve clearance.

V00867
EXAMPLE: The 2.800 mm (0.1102 in.) shim is installed,
and the measured clearance is 0.450 mm (0.0177 in.).
Replace the 2.800 mm (0.1102 in.) shim with a new No.11
shim.Adjusting Shim Selection Chart (Intake)
Intake valve clearance (Cold):
0.19 − 0.29 mm (0.007 − 0.011 in.)
2.500 (0.0984)
2.550 (0.1004)
2.600 (0.1024)
2.650 (0.1043)
2.700 (0.1063)
2.750 (0.1083)
2.800 (0.1102)
2.850 (0.1122)
2.900 (0.1142)2.950 (0.1161)
3.000 (0.1181)
3.050 (0.1201)
3.100 (0.1220)
3.150 (0.1240)
3.200 (0.1260)
3.250 (0.1280)
3.300 (0.1299) Shim
No.ThicknessShim
No.Thickness
4
5
6
7
8 3 2
1
910
11
12
13
14
15
16
17
HINT: New shims have the thickness in millimeters
imprinted on the face.
Installed shim thickness
Measured clearancemm (in.)
mm (in.)
New shim thickness
mm (in.)
EM−8
− ENGINE MECHANICALVALVE CLEARANCE
1996 RAV4 (RM447U)