1996 TOYOTA RAV4 Engine

DI−16
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U) DTC No.
(See Page)
Detection ItemTrouble AreaMILMemory
P0441
(DI−82)Evaporative Emission Control
System Incorrect Purge Flow
Open or short in VSV circuit for vapor pressure sensor
VSV for vapor pressure sensor
Open or short in vapor pressure sensor circuit
Vapor pressure sensor
Open or short in VSV circuit for EVAP
VSV for EVAP
Vacuum hose cracked, holed, blocked, damaged or
disconnected
Charcoal canister cracked, holed or damaged
 *1
P0446
(DI−82)Evaporative Emission Control
System Vent Control
Malfunction
P0450
(DI−92)Evaporative Emission Control
System Pressure Sensor
MalfunctionOpen or short in vapor pressure sensor circuit
Vapor pressure sensor
ECM
 *1
P0500
(DI−94)Vehicle Speed Sensor
Malfunction
Open or short in vehicle speed sensor circuit
Vehicle speed sensor
Combination meter
ECM
 *1
P0505
(DI−97)Idle Control System Malfunction
IAC valve is stuck or closed
Open or short in IAC valve circuit
Open or short AC1 single circuit
Air intake (hose loose)
 *1
*1: MIL lights up
MANUFACTURER DEFINED
DTC No.
(See Page)Detection ItemTrouble AreaMILMemory
P1300
(DI−100)Ignition Circuit Malfunction
Open or short in IGF or IGT circuit from igniter to ECM
Igniter
ECM
 *1
P1500
(DI−105)Starter Signal Circuit Malfunction
Open or short in starter signal circuit
Open or short in ignition switch or starter relay circuit
ECM
 *1
P1600
(DI−108)ECM BATT MalfunctionOpen in back up power source circuit
ECM *1
P1780
(DI−11 0)Park / Neutral Position Switch
MalfunctionShort in park / neutral position switch circuit
Park / neutral position switch
ECM
 *1
*1: MIL lights up

DI3Z9−02
A15826
− DIAGNOSTICSENGINE
DI−17
1996 RAV4 (RM447U)
PARTS LOCATION

DI3ZA−02
A07400
E4E5E6 DI−18
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
TERMINALS OF ECM
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
BATT (E6−1) − E1 (E4−14)R−W ↔ BRAlways9 ∼ 14
+B (E6−12) − E1 (E4−14)B−R ↔ BRIG switch ON9 ∼ 14
VC (E5−1) − E2 (E5−9)Y ↔ BRIG switch ON4.5 ∼ 5.5
VTA (E5−11) − E2 (E5−9)L−R ↔ BR
IG switch ON
Throttle valve fully closed.0.3 ∼ 0.8
IG switch ON
Throttle valve fully open.3.2 ∼ 4.9
PIM (E5−2) − E2 (E5−9)LG−R ↔ BR
IG switch ON3.3 ∼ 3.9
Apply vacuum 26.7 kpa
(200 mmHg, 7.9 in. Hg)2.5 ∼ 3.1
THA (E5−3) − E2 (E5−9)Y−B ↔ BRIdling, Intake air temp. 20°C (68°F)0.5 ∼ 3.4
THW (E5−4) − E2 (E5−9)W ↔ BRIdling, Engine coolant temp. 80°C (176°F)0.2 ∼ 1.0
STA (E6−11) − E1 (E4−14)B−W (M/T) ↔ BRCranking6.0 or more
STA (E6−11) − E1 (E4−14)B (A/T) ↔ BRCranking6.0 or more
#10 (E4−12) − E01 (E4−13)B−R ↔ BR
IG switch ON9 ∼ 14
IdlingPulse generation
(See page DI−51)
#20 (E4−11) − E01 (E4−13)B−Y ↔ BR
IG switch ON9 ∼ 14
IdlingPulse generation
(See page DI−51)
#30 (E4−25) − E01 (E4−13)B−R ↔ BR
IG switch ON9 ∼ 14
IdlingPulse generation
(See page DI−51)
#40 (E4−24) − E01 (E4−13)B−Y ↔ BR
IG switch ON9 ∼ 14
IdlingPulse generation
(See page DI−51)
IGT (E4−20) − E1 (E4−14)B ↔ BRIdlingPulse generation
(See page DI−100)
IGF (E4−3) − E1 (E4−14)L−Y ↔ BR
IG switch ON
Disconnect igniter connector4.5 ∼ 5.5
IdlingPulse generation
(See page DI−100)
G (E4−5) − NE (E4−14)B ↔ GIdlingPulse generation
(See page DI−59)
NE (E4−4) − NE (E4−17)R ↔ GIdlingPulse generation
(See page DI−59)

− DIAGNOSTICSENGINE
DI−19
1996 RAV4 (RM447U) FC (E6−14) − E1 (E4−14)
G−R ↔ BRIG switch ON9 ∼ 14
EGR (E4−23) − E1 (E4−14)B−W ↔ BRIG switch ON0 ∼ 3
ISCC (E4−9) − E1 (E4−14)B−Y ↔ BRIG switch ON
Disconnect E4 of ECM connector9 ∼ 14
ISCO (E4−10) − E1 (E4−14)B−L ↔ BRIG switch ON
Disconnect E4 of ECM connector9 ∼ 14
OX1 (E5−6) − E1 (E4−14)B ↔ BRMaintain engine speed at 2,500 rpm for 2 mins. after
warning up.Pulse generation
OX2 (E5−5) − E1 (E4−14)B ↔ BRMaintain engine speed at 2,500 rpm for 2 mins. after
warning up.Pulse generation
KNK (E5−10) − E1 (E4−14)B ↔ BRIdlingPulse generation
(See page DI−56)
* NSW (E6−22) − E1 (E4−14)B−W ↔ BR
IG switch ON
Other shift position in ”P” , ”N” position9 ∼ 14
IG switch ON
Shift position in ”P” , ”N” position0 ∼ 3.0
SPD (E6−9) − E1 (E4−14)V−W ↔ BRIG switch ON
Rotate driver wheel slowly.Pulse generation
(See page DI−94)
TE1 (E5−15) − E1 (E4−14)L−W ↔ BRIG switch ON9 ∼ 14
W (E6−5) − E1 (E4−14)G−R ↔ BRIdling9 ∼ 14
IG switch ONBelow 3.0
AC (E6−10) − E1 (E4−14)Y−G ↔ BRIdling, A/C switch ONBelow 2.0
Idling, A/C switch OFF9 ∼ 14
ACT (E6−21) − E1 (E4−14)R−Y ↔ BRIdling, A/C switch ON9 ∼ 14
Idling, A/C switch OFFBelow 2.0
* OD2 (E6−7) − E1 (E4−14)LG ↔ BRIG switch ON, O/D main switch pushed out9 ∼ 14
IG switch ON, O/D main switch pushed in0 ∼ 3
* OD1 (E6−20) − E1 (E4−14)Y−B ↔ BRIG switch ON, Cruise control ECU no request O/D cut9 ∼ 14
IG switch ON, Cruise control ECU request O/D cut0 ∼ 3
EVP (E4−22) − E1 (E4−14)P ↔ BRIG switch ON9 ∼ 14
TPC (E5−8) − E1 (E4−14)R−W ↔ BRIG switch ON9 ∼ 14
PTNK (E5−7) − E2 (E5−9)L−Y ↔ BR
IG switch ON, Disconnect vacuum hose from vapor
pressure sensor2.9 ∼ 3.7
Apply vacuum
(4.0 kPa, 30 mmHg, 1.18 in. Hg)
(less than 66.7 kPa, 500 mmHg, 19.7 in. Hg)
Below 0.5
ELS (E6−17) − E1 (E4−14)B ↔ BRDefogger switch and taillight switch ON7.5 ∼ 14
Defogger switch and taillight switch OFF0 ∼ 1.5
SDL (E6−16) − E1 (E4−14)W ↔ BRDuring transmissionPules generation
*: A/T only

DI3ZB−02
DI−20
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
PROBLEM SYMPTOMS TABLE
When the malfunction code is not confirmed the DTC check and the problem still can not be confirmed in
the basic inspection, then proceed to this step and perform troubleshooting according to the numbered order
given in the table below.
SymptomSuspect AreaSee page
Does not start (Engine does not crank1. Starter and starter relayST Section
Does not start (No combustion)
1. ECM power source circuit
2. Fuel pump control circuit
3. Engine control module (ECM)DI−11 3
DI−11 6
IN−30
Does not start (No complete combustion)1. Fuel pump control circuitDI−11 6
Difficult to start (Engine cranks normally)1. Fuel pump control circuit
2. CompressionDI−11 6
EM−3
Difficult to start (Cold engine)1. Starter signal circuit
2. Fuel pump control circuitDI−105
DI−11 6
Difficult to start (Hot engine)1. Starter signal circuit
2. Fuel pump control circuitDI−105
DI−11 6
Poor idling (High engine idle speed)1. A/C signal circuit
2. ECM power source circuitAC−64
DI−11 3
Poor idling (Low engine idle speed)1. A/C signal circuit
2. Fuel pump control circuitAC−64
DI−11 6
Poor idling (Rough idling)1. Compression
2. Fuel pump control circuitEM−3
DI−11 6
Poor idling (Hunting)1. ECM power source circuit
2. Fuel pump control circuitDI−11 3
DI−11 6
Poor Driveability (Hesitation / Poor acceleration)
1. Fuel pump control circuit
2. A/T faulty
3. A/C cut control circuitDI−11 6
DI−141
DI−122
Poor Driveability (Surging)1. Fuel pump control circuitDI−11 6
Engine stall (Soon after starting)1. Fuel pump control circuitDI−11 6
Engine stall (During A/C operation)1. A/C signal circuit
2. Engine control module (ECM)AC−64
IN−30

DI3ZC−01
P01242
(V)
(3.96)
3.6
2.4
1.2
150 450 750 (840)mmHg
20
60
100(112)
Manifold Absolute PressurekPa
Output Voltage
− DIAGNOSTICSENGINE
DI−21
1996 RAV4 (RM447U)
CIRCUIT INSPECTION
DTC P0105 Manifold Absolute Pressure / Barometric
Pressure Circuit Malfunction
CIRCUIT DESCRIPTION
By a built−in sensor unit, the manifold absolute pressure sensor
detects the intake manifold pressure as a voltage. The ECM
then determines the basic injection duration and basic injection
advance angle based on this voltage. Since the manifold abso-
lute pressure sensor does not use the atmospheric pressure as
a criterion, but senses the absolute pressure inside the intake
manifold (the pressure in proportion to the present absolute
vacuum 0) , it is not influenced by fluctuations in the atmospher-
ic pressure due to high altitude and other factors. This permits
it to control the air−fuel ratio at the proper lever under all condi-
tions.
DTC No.DTC Detecting ConditionTrouble Area
P0105Open or short manifold absolute pressure sensor circuit
Open or short in manifold absolute pressure sensor circuit
Manifold absolute pressure sensor
ECM
If the ECM detects DTC ”P0105” it operates the fail safe function, keeping the ignition timing and injection
volume constant and making it possible to drive the vehicle.
HINT:
After confirming DTC P0105 use the OBDII scan tool or TOYOTA hand−held tester to confirm the manifold
absolute pressure from ”CURRENT DATA”.
Manifold Absolute PressureMalfunction
0 kpaPIM circuit short
130 kpa or more
VC circuit open or short
PIM circuit open
E2 circuit open

P25423
Manifold Absolute Pressure Sensor
3
2
1E51
2
BR LG−R Y
VC
PIM
E25 V ECM
9 E5
E5
E1
A00389
ON
E2
(−)VC
(+)
DI−22
− DIAGNOSTICSENGINE
1996 RAV4 (RM447U)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
If DTC P0105, P0110, P0115, P0120 are output simultaneously, E2 (sensor ground) may be open.
1 Connect OBDII scan tool or TOYOTA hand−held tester, and read value of man-
ifold absolute pressure.
PREPARATION:
(a) Connect the OBDII scan tool or TOYOTA hand−held tester to the DLC3.
(b) Turn ignition switch ON and OBDII scan tool or TOYOTA hand−held tester main switch ON.
CHECK:
Read value of manifold absolute pressure on the OBDII scan tool or TOYOTA hand−held tester.
OK:
Same as atmospheric pressure.
OK Check for intermittent problems
(See page DI−3).
NG
2 Check voltage between terminals VC and E2 of ECM connector.
PREPARATION:
(a) Remove side trim cover (See page SF−61).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals VC and E2 of ECM con-
nector.
OK:
Voltage : 4.5 − 5.5V

A00390
ON
PIM
(+)E2
(−)
− DIAGNOSTICSENGINE
DI−23
1996 RAV4 (RM447U)
NG Check and replace ECM (See page IN−30).
OK
3 Check voltage between terminals PIM and E2 of ECM connector.
PREPARATION:
(a) Remove side trim cover (See page SF−61).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals PIM and E2 of ECM con-
nector.
OK:
Voltage : 3.3 − 3.9 V
OK Check and replace ECM (See page IN−30).
NG
4 Check for open and short in harness and connector between manifold absolute
pressure sensor and ECM.
NG Repair or replace harness or connector.
OK
Replace manifold absolute pressure sensor.