TOYOTA RAV4 1996 Service Repair Manual

− DIAGNOSTICSENGINE
DI−121
1996 RAV4 (RM447U)
4 Check voltage between terminal FC of ECM and body ground (See page DI−11 6,
step 4).
NG Check for open in harness and connector be-
tween EFI main relay (Marking: EFI) and circuit
opening relay, circuit opening relay and ECM.
OK
5 Check fuel pump (See page SF−5).
NG Repair or replace fuel pump.
OK
6 Check for open in harness and connector between circuit opening relay and fuel
pump, fuel pump and body ground (See page IN−30).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN−30).

S02412
A/C Amplifier
B+
R−Y
E621
ACTECM
E1 7 DI−122
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
A/C Cut Control Circuit
CIRCUIT DESCRIPTION
This circuit cuts air conditioning operation during vehicle acceleration in order to increase acceleration per-
formance. During acceleration with the vehicle speed at 25 km/h (16 mph) or less, engine speed at 1,200
rpm or less and throttle valve opening angle at 60° or more, the A/C magnet switch is turned OFF for several
seconds.
WIRING DIAGRAM
DI408−01

− DIAGNOSTICSENGINE
DI−123
1996 RAV4 (RM447U)
INSPECTION PROCEDURE
TOYOTA hand−held tester:
1 Connect the TOYOTA hand−held tester and check operation of air conditioning
cut control.
PREPARATION:
(a) Connect the TOYOTA hand−held tester to the DLC3.
(b) Turn ignition switch ON and TOYOTA hand−held tester main switch ON.
(c) Starter the engine and air conditioning switch ON.
HINT:
A/C magnet clutch is turned ON.
(d) Select the ACTIVE TEST mode on the TOYOTA hand−held tester.
CHECK:
Check operation of A/C magnet clutch cut when air conditioning cut control is operated by the TOYOTA
hand−held tester.
OK:
A/C magnet clutch is turned OFF.
OK Proceed to next circuit inspection shown on
matrix chart (See page DI−20).
NG
2 Check for open and short in harness and connector between ECM and A/C am-
plifier (See page IN−30).
NG Repair or replace harness or connector.
OK

P23738
ACT
(+)
DI−124
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
3 Check voltage between terminal ACT of ECM and body ground.
PREPARATION:
(a) Remove side trim cover (See page SF−61).
(b) Start the engine.
CHECK:
Measure voltage between terminal ACT of ECM connector and
body ground when A/C switch is turned to ON and OFF.
OK:
A/C switch conditionVoltage
ON9 − 14 V
OFFBelow 2.0 V
NG Check and replace A/C amplifier.
OK
Check and replace ECM (See page IN−30).
OBDII scan tool (excluding TOYOTA hand−held tester)
1 Check voltage between terminal ACT of ECM and body ground (See same page,
step 3).
OK Check and replace ECM (See page IN−30).
NG
2 Check for open and short in harness connector between ECM and A/C amplifier
(See page IN−30).
NG Repair or replace harness or connector.
OK
Check and replace A/C amplifier.

DI409−02
Vehicle Brought to Workshop
P.DI−126
Connect the OBD ll Scan Tool or TOYOTA Hand−Held Tester to DLC3
If your display shows ”UNABLE TO CONNECT TO VEHICLE” when you have
connected the scan tool/TOYOTA hand−held tester, inspect DLC3 P. DI−127
Check DTC and Freeze Frame Data (Pre−check)
Record or Print DTC and Freeze Frame Data P. DI−127
Clear DTC and Freeze Frame Data P. DI−127 Customer Problem Analysis
Visual Inspection
DTC CheckSymptom Simulation Setting the Check Mode Diagnosis P. DI−127
Problem Symptom Confirmation
P. IN−20 Symptom does
not occur
OK Codethe page number indicated in the bottom portion. See the
indicated pages for detailed explanations.
Preliminary Checkare titles of pages in the manual, with Item inside
Mechanical System Tests DTC Chart
Chapter 1
(Electronic)Manual Shifting Test
Matrix Chart of Symptoms Problems − P. DI−140
(On−vehicle)
 Pattern Select Signal Check  O/D Signal Check
InspectionCircuit(Off−vehicle) Chapter 2 Chapter 3
END Repair
Confirmation Test
Identification of ProblemParts Inspection P. DI−127
P. DI−127P. DI−127
P. DI−127
P. DI−127
P. DI−145 − DI−168 P. DI−141 1
2
P. DI−141P. DI−141 3
4
5
6
78
9
1011
12
13
14
16
18 15
17
Symptom occurs
OKNG
OKNG
NG
OK
OK OK
NG
NGNG
Step 2, 3, 4, 6, 9, 15, 18:
Diagnostic steps permitting the use of the TOYOTA
hand−held tester or TOYOTA brake−out−box.
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
DI−125
1996 RAV4 (RM447U)
AUTOMATIC TRANSAXLE (A241E)
HOW TO PROCEED WITH TROUBLESHOOTING
Trobleshoot in accordance with the procedure on the follwoing pages.

Brought InInspector ’s
System Check Sheet
Name
Customer ’s NameTransaxle Control
Registration No.
Frame No.
Date VehicleRegistration Year:
Date Problem
Frequency
Problem Occurs Occurred/ /
Odometer Reading
SymptomsIntermittent ( times a day)
Vehicle does not move Any positionContinuous
Particular position) / /km
mile
/ /
Shift point too high or too low No up−shift 1st → 2nd
Lock−up malfunction
Harsh engagement No down−shift
(
3rd → O/D) (
N → D (
2nd → 1st) 2nd → 3rd
3rd → 2nd O/D → 3rd
Slip or shudder
No kick−down
Malfunction code (Code )Any drive position) Lock−up
Others
1st Time
2nd Time(
Indicator LampRemains ON Check ItemMalfunction
Normal
DTC Check
Normal
NormalMalfunction code (Code )
DI40A−01
DI−126
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
1996 RAV4 (RM447U)
CUSTOMER PROBLEM ANALYSIS CHECK

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).

Q08848
DI−128
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
1996 RAV4 (RM447U)
The diagnosis system operates in normal mode
during normal vehicle use, and also has a check
mode for technicians to simulate malfunction symp-
toms and perform troubleshooting. Most DTCs use
2 trip detection logic (*) to prevent erroneous detec-
tion. By switching the ECM to check mode when
troubleshooting, the technician can cause the MIL
to light up for a malfunction that is only detected
once or momentarily (TOYOTA hand−held tester)
(See page DI−127).
*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 test
drive, this second detection causes the MIL to light up.
2. Normal Mode:
INSPECT DIAGNOSIS
(a) Check the MIL.
(1) The MIL lights up 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
(See page BE−2).
(2) When the engine starts, the MIL should go off. If the
lamp remains on, the diagnosis system has de-
tected a malfunction or abnormality in the system.
(b) Check the DTC.
NOTICE:
TOYOTA hand−held tester only:
When the diagnostic system is switched from the normal
mode to the check mode, it erases all DTCs and freezed
frame data recorded in the normal mode. So before switch-
ing modes, always check the DTCs and freezed frame data,
and note them down.
(1) Prepare the OBD II scan tool (complying with SAE
J1978) or TOYOTA hand−held tester.
(2) Connect the OBD II scan tool or TOYOTA hand−
held tester to the DLC3.
(3) Turn the ignition switch ON and turn the OBD II scan
tool or TOYOTA hand−held tester switch ON.
(4) Use the OBD II scan tool or TOYOTA hand−held
tester to check the DTCs and freezed frame data.
Note them down (For operating instructions, see
the OBDII scan tool’s instruction book.).

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.

Q08495
DTC3 DI−130
− DIAGNOSTICSAUTOMATIC TRANSAXLE (A241E)
1996 RAV4 (RM447U)
(b) Clear the DTC.
The following actions will erase the DTCs and
freezed frame data.
Operating the OBDII scan tool (complying with SAE
J1978) or TOYOTA hand−held tester to erase the
codes (See the TOYOTA hand−held tester or OBD
II scan tool’s instruction book for operating instruc-
tions.).
NOTICE:
If the TOYOTA hand−held tester switches the ECM from the
normal mode to the check mode or vice−versa, or if the
ignition switch is turned from ON to ACC or OFF during the
check mode, the DTCs and freezed frame data will be
erased.
(c) Inspect 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.
Terminal No.Connection/Voltage or ResistanceCondition
2Bus  Line/Pulse generationDuring communication
4Chassis Ground − Body/1 Ω or lessAlways
5Signal Ground − Body/1 Ω or lessAlways
16Battery Positive − Body/9 − 14 V or 1 Ω or lessAlways
HINT:
If your display shows ”UNABLE TO CONNECT TO VEHICLE”
when you have connected the cable of the OBD II scan tool or
TOYOTA hand−held tester to the DLC3, turned the ignition
switch ON and operated the scan tool, there is a problem on the
vehicle side or tool side.
If communication is normal when the tool is connected to
another vehicle, inspect the 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.