cable TOYOTA RAV4 1996 Service Owner's Manual

Fuse BlockEngine ECU R/B No. 5 J/B No. 1J/B No. 4 ABS ECUDaytime Running
Light Relay (*1) Door Look Control RelayA/C Amplifier J/B No. 3
4. ECU (ELECTRONIC CONTROL UNIT)
Locations of ECUs
Many ECUs are mounted in this vehicle.
Take the following precautions during body repair to prevent damage to the ECUs.

Before starting electric welding operations, disconnect the negative (-) terminal cable from the battery.
When the negative (-) terminal cable is disconnected from the battery, memory of the clock and audio
systems will be cancelled. So before starting work, make a record of the contents memorized by each
memory system. Then when work is finished, reset the clock and audio systems as before.
When the vehicle has tilt and telescopic steering, power seat and outside rear view mirror, which are all
equipped with memory function, it is not possible to make a record of the memory contents.
So when the operation is finished, it will be necessary to explain this fact to the customer, and request
the customer to adjust the features and reset the memory.

Do not expose the ECUs to ambient temperatures above 80°C (176°F).
NOTICE: If it is possible the ambient temperature may reach 80 °C (176 °F) or more, remove the ECUs
from the vehicle before starting work.

Be careful not to drop the ECUs and not to apply physical shocks to them.
4. COMPONENTS ADJACENT TO THE BODY PANELS
Various types of component parts are mounted directly on or adjacently to the body panels.
Strictly observe the following precautions to prevent damaging these components and the body panels
during handling.

Before repairing the body panels, remove their components or apply protective covers over the comœ
ponents.

Before prying components off using screwdriver or a scraper, etc., attach protective tape to the tool
tip or blade to prevent damaging the components and the body paint.

Before removing components from the outer surface of the body, attach protective tape to the body to
ensure no damage to painted areas.
HINT: Apply touch-up paint to any damaged paint surfaces.

Before drilling or cutting sections, make sure that there are no wires, etc. on the reverse side.
INTRODUCTIONINœ8

GENERAL REPAIR INSTRUCTIONS
Work Precautions
VEHICLE PROTECTION
When welding, protect the
painted surfaces, windows,
seats and carpet with heat-
resistant, fire-proof covers. SAFETY
Never stand in direct line
with the chain when using
a puller on the body or
frame, and be sure to
attach a safety cable.SAFETY
1. Before performing repair work, check
for fuel leaks. If a leak is found, be sure
to close the opening totally.
2. If it is necessary to use a frame in the
area of the fuel tank, first remove the
tank and plug the fuel line.
WRONG
Glass Cover
Safety Cable
Seat Cover
WRONG
HAND TOOLS
Keeping your hand tools
in neat order improve
your work efficiency. SAFETY WORK CLOTHES
In addition to the usual mechanic's wear, cap and safety shoes,
the appropriate gloves, head protector, glasses, ear plugs, face
protector, dust-prevention mask, etc. should be worn as the
situation demands.
Dust-
Prevention
MaskWelder's
Glasses
Ear
Plugs
Face
ProtectorBody
Tools
Stand
Head
Protector Eye
Protector
Welder's
Gloves Safety
Shoes
INTRODUCTIONINœ9

DI3Z7−01
FI0534
S01354
TOYOTA
Hand−Held Tester
− DIAGNOSTICSENGINE
DI−3
1996 RAV4 (RM447U)
PRE−CHECK
1. DIAGNOSIS SYSTEM
(a) Description
When troubleshooting OBDII vehicles, the only dif-
ference from the usual troubleshooting procedure
is that you connect to the vehicle the OBDII scan
tool complying with SAE J1978 or TOYOTA hand−
held tester, and read off various data output from
the vehicle’s ECM.
OBDII regulations require that the vehicle’s on−
board computer lights up the Malfunction Indicator
Light (MIL) on the instrument panel when the com-
puter detects a malfunction in the computer itself on
in drive system components which affect vehicle
emissions. In addition to the MIL lighting up when
a malfunction is detected, the applicable Diagnostic
Trouble Code (DTC) prescribed by SAE J2012 are
recorded in the ECM memory (See page DI−14).
If the malfunction does not recur in 3 trips, the MIL
goes off but the DTC remain recorded in the ECM
memory.
To check the DTC, connect the OBDII scan tool or
TOYOTA hand−held tester to Data Link Connector
3 (DLC3) on the vehicle. The OBDII scan tool or
TOYOTA hand−held tester also enables you to
erase the DTC and check freezed frame data and
various forms of engine data. (For operating instruc-
tions, see the OBDII scan tool’s instruction book.)
DTC include SAE controlled codes and Manufac-
ture controlled codes.
SAE controlled codes must be set as prescribed by
the SAE, while Manufacturer controlled codes can
be set freely by the manufacturer within the pre-
scribed limits (See DTC chart on page DI−14).
The diagnosis system operates in normal mode
during normal vehicle use. It also has a check mode
for technicians to simulate malfunction symptoms
and troubleshoot. Most DTC use 2 trip detection
logic* to prevent erroneous detection and ensure
thorough malfunction detection.

N09214
DLC 3 DI−4
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
By switching the ECM to check mode when trouble-
shooting, the technician can cause the MIL to light
up for a malfunction that is only detected once or
momentarily (TOYOTA hand−held tester only) (See
page DI−3).
*2 trip detection logic:
When a logic malfunction is first detected, the mal-
function is temporarily stored in the ECM memory.
If the same malfunction is detected again during the
second drive test, this second detection causes the
MIL to light up.
The 2 trip repeats the same mode a 2nd time. (How-
ever, the IG switch must be turned OFF between the
1st trip and 2nd trip).
Freeze frame data:
Freeze frame data records the engine condition
when a misfire (DTC P0300 − P0304) or fuel trim
malfunction (DTC P0171, P0172), or other malfunc-
tion (first malfunction only), is detected.
Because freeze frame data records the engine
conditions (fuel system, calculator load, engine
coolant temperature, fuel trim, engine speed, ve-
hicle speed, etc.) when the malfunction is detected,
when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the en-
gine warmed up or not, the air−fuel ratio lean or rich,
etc. at the time of the malfunction.
Priorities for Troubleshooting:
If troubleshooting priorities for multiple diagnostic
codes are given in the applicable diagnostic chart,
these should be followed.
If no instructions are given, troubleshoot DTC according to the
following priorities.
(1) DTC other than fuel trim malfunction (DTC P0171,
P0172), EGR (DTC P0401, P0402), and misfire
(DTC P0300 − P0304).
(2) Fuel trim malfunction (DTC P0171, P0172) and
EGR (DTC P0401, P0402).
(3) Misfire (DTC P0300 − P0304).
(b) Check the DLC3.
The vehicle’s ECM uses V.P.W. (Variable Pulse Width) for
communication to comply with SAE J1850. The terminal
arrangement of DLC3 complies with SAE J1962 and
matches the V.P.W. format.

S02459
− DIAGNOSTICSENGINE
DI−5
1996 RAV4 (RM447U) Terminal No.
Connection / Voltage or ResistanceCondition
2Bus  Line / Pulse generationDuring transmission
4Chassis Ground / ↔ Body Ground 1 Ω or lessAlways
5Signal Ground / ↔ Body Ground 1 Ω or lessAlways
16Battery Positive / ↔ Body Ground 9 ∼ 14VAlways
HINT:
If your display shows ”UNABLE TO CONNECT TO VEHICLE”
when you have connected the cable of the OBDII scan tool or
TOYOTA hand−held tester to DLC3, turned the ignition switch
ON and operated the scan tool, there is a problem on the ve-
hicle side or tool side.
If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool’s instruction manual.
2. INSPECT DIAGNOSIS (Normal Mode)
(a) Check the MIL.
(1) The MIL comes on when the ignition switch is turned
ON and the engine is not running.
HINT:
If the MIL does not light up, troubleshoot the combination meter.
(2) When the engine is started, the MIL should go off.
If the lamp remains on,the diagnosis system has
detected a malfunction or abnormality in the sys-
tem.
(b) Check the DTC.
NOTICE:
TOYOTA hand−held tester only:
When the diagnosis system is switched from normal mode
to check mode, it erases all DTC and freezed frame data re-
corded in normal mode. So before switching modes, al-
ways check the DTC and freezed frame data, and note them
down.
(1) Prepare the OBDII scan tool (complying with SAE
J1978) or TOYOTA hand−held tester.
(2) Connect the OBDII scan tool or TOYOTA hand−
held tester to DLC3 at the lower of the instrument
panel.
(3) Turn the ignition switch ON and turn the OBDII scan
tool or TOYOTA hand−held tester switch ON.
(4) Use the OBDII scan tool or TOYOTA hand−held tes-
ter to check the DTC and freezed frame data, note
them down.
(5) See page DI−14 to confirm the details of the
DTC.

− DIAGNOSTICSENGINE
DI−7
1996 RAV4 (RM447U)
(10) After checking the DTC, inspect the applicable cir-
cuit.
(b) Clear the DTC.
The following actions will erase the DTC and freezed
frame data.
(1) Operating the OBDII scan tool (complying with SAE
J1978) or TOYOTA hand−held tester to erase the
codes.
(See the OBDII scan tool’s instruction book for oper-
ating instructions.)
(2) Disconnecting the battery terminals or EFI fuse.
NOTICE:
If the TOYOTA hand−held tester switches the ECM from
normal mode to check mode or vice−versa, or it the ignition
switch is turned from ON to ACC or OFF during check
mode, the DTC and freezed frame data will be erased.
4. FAIL−SAFE CHART
If any of the following codes is recorded, the ECM enters fail−sate mode.
DTC No.Fail−Safe OperationFail−Safe Deactivation Conditions
P0105Ignition timing fixed at 5° BTDCReturned to normal condition
P0110Intake air temp. is fixed at 68°F (20°C)Returned to normal condition
P0115Engine coolant temp. is fixed at 176°F (80°C)Returned to normal condition
P0120VTA is fixed at 0°
The following condition must be repeated at least
2 times consecutively
When closed throttle position switch is ON:
0.1 V  VTA  0.95 V
P0325Max. timing retardationIgnition switch OFF
P1300Fuel cutIGF signal is detected for 1 ignition
5. CHECK FOR INTERMITTENT PROBLEMS
TOYOTA hand−held tester only:
By putting the vehicle’s ECM in check mode, 1 trip detection logic possible instead of 2 trip detection logic
and sensitivity to detect open circuit is increased. This makes it easier to detect intermittent problems.
(1) Clear the diagnostic trouble codes (See page DI−3)
(2) Set the check mode (See page DI−3)
(3) Perform a simulation test (See page IN−20)
(4) Check the connector and terminal inspection (See page IN−30)
(5) Visual check and contact pressure (See page IN−30)
(6) Handle the connector (See page IN−30)

DI−38
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
DTC P0121 Throttle/Pedal Position Sensor/Switch ”A”
Circuit Range/Performance Problem
CIRCUIT DESCRIPTION
Refer to Throttle / Pedal Position Sensor / Switch ”A” Circuit Malfunction on page DI−34.
DTC No.DTC Detecting ConditionTrouble Area
P0121
After the vehicle speed has been exceeded 30 km/h (19 mph)
even once, the output value of the throttle position sensor is
out of the applicable range while the vehicle speed between 30
km/h (19 mph) and 0 km/h (0 mph)
(2 trip detection logic)
Throttle position sensor
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P0121) being output?
YES Go to relevant DTC chart.
NO
Replace throttle position sensor.
DI3ZI−01

IG0317IG0151P25066A06618
1.1 − 1.3 mm
(0.043 − 0.051 in.)
A00404
”10 (+)
#30 (+)#40 (+) ON
#20 (+)
− DIAGNOSTICSENGINE
DI−53
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
1 Check spark plug and spark of misfiring cylinder.
PREPARATION:
(a) Disconnect the high−tension cord from spark plug.
(b) Remove spark plug.
CHECK:
(a) Check the carbon deposits on electrode.
(b) Check electrode gap.
OK:
(1) No large carbon deposit present.
Not wet with gasoline or oil.
(2) Electrode gap: 1.1 − 1.3 mm (0.043 − 0.051 in.)
PREPARATION:
(a) Install the spark plug to the high − tension cord.
(b) Disconnect injector connector.
(c) Ground spark plug.
CHECK:
Check if spark occurs while engine is being cranked.
NOTICE:
To prevent excess fuel being injected from the injectors
during this test, do not crank the engine for more than 5 −
10 seconds at a time.
OK:
Spark jumps across electrode gap.
NG Replace or check ignition system (See page
IG−1).
OK
2 Check voltage of ECM terminal for injector of failed cylinder.
PREPARATION:
(a) Remove side trim cover (See page SF−61).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between applicable terminal of ECM connec-
tor and body ground.
OK:
Voltage: 9 − 14 V
OK Go to step 4
NG

DI40B−02
Q08848
Q08736
TOYOTA Hand−held Tester
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−127
1996 RAV4 (RM447U)
PRE−CHECK
1. DIAGNOSIS SYSTEM
(a) Description
When troubleshooting OBDII vehicles, the only dif-
ference from the usual troubleshooting procedure
is that you connect the OBDII scan tool complying
with SAE J1978 or TOYOTA hand−held tester to the
vehicle, and read off various data output from the
vehicle’s ECM.
OBD ll regulations require that the vehicle’s on−
board computer lights up the Malfunction Indicator
Lamp (MIL) on the instrument panel when the com-
puter detects a malfunction in the computer itself or
in drive system components which affect the vehicle
emissions. In addition to the MIL lighting up when
a malfunction is detected, the applicable DTCs pre-
scribed by SAE J2012 are recorded in the ECM
memory (See page DI−14).
If the malfunction does not reoccur in 3 trips, the MIL goes off
but the DTCs remain recorded in the ECM memory.
To check the DTCs, connect the OBDII scan tool or
TOYOTA hand−held tester to the DLC3 on the ve-
hicle. The OBDII scan tool or TOYOTA hand−held
tester also enables you to erase the DTCs and
check freezed frame data and various forms of en-
gine data. (For operating instructions, see the OBD
II scan tool’s instruction book.)
DTCs include SAE controlled codes and Manufac-
turer controlled codes.
SAE controlled codes must be set as prescribed by
the SAE, while Manufacturer controlled codes can
be set freely by the manufacturer within the pre-
scribed limits (See page DI−138).

FI3605
013 sec. ON
OFF
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−129
1996 RAV4 (RM447U)
(5) See page DI−138 to confirm the details of the
DTCs.
NOTICE:
When simulating symptoms with an OBD II scan tool (ex-
cluding TOYOTA hand−held tester) to check the DTCs, use
the normal mode. For codes on the DTC chart subject to ”2
trip detection logic”, turn the ignition switch off after the
symptoms have been simulated for the first time. Then re-
peat the simulation process again. When the program has
been simulated twice, the MIL lights up and the DTCs are
recorded in the ECM.
3. Check Mode:
INSPECT DIAGNOSIS
HINT:
TOYOTA hand−held tester only:
Compared to the normal mode, the check mode has high sens-
ing ability to detect malfunctions.
Furthermore, the same diagnostic items which are detected in
the normal mode can also be detected in the check mode.
(a) Check the DTC.
(1) Initial conditions.
Battery positive voltage 11 V or more
Throttle valve fully closed
Transaxle in the PARK position
Air conditioning switched off
(2) Prepare the TOYOTA hand−held tester.
(3) Connect the TOYOTA hand−held tester to the
DLC3.
(4) Turn the ignition switch ON and switch the TOYOTA
hand−held tester ON.
(5) Switch the TOYOTA hand−held tester from the nor-
mal mode to the check mode (Check that the MIL
flashes.).
(6) Start the engine (The MIL goes off after the engine
start.).
(7) Simulate the conditions of the malfunction de-
scribed by the customer.
NOTICE:
Leave the ignition switch ON until you have checked the
DTCs, etc.
(8) After simulating the malfunction conditions, use the
TOYOTA hand−held tester diagnosis selector to
check the DTCs and freezed frame data, etc.
HINT:
Take care not to turn the ignition switch OFF.
Turning the ignition switch off switches the diagnosis system
from check mode to normal mode, so all DTCs, etc. are erased.
(9) After checking the DTC, inspect the applicable cir-
cuit.