check engine TOYOTA RAV4 2006 Service Workshop Manual

ES–302GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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– Air-fuel ratio feedback control is performed.
(b) Drive Pattern for front A/F sensor and HO2 sensor
(1) Connect the intelligent tester to the DLC3.
(2) Turn the ignition switch ON.
(3) Turn the tester ON.
(4) Clear DTCs (see page ES-39).
(5) Start the engine, and warm it up until the ECT
reaches 75
C (167F) or higher.
(6) Drive the vehicle at between 60 km/h (38 mph)
and 120 km/h (75 mph) for at least 10 minutes.
(7) Change the transmission to 2nd gear.
(8) Accelerate the vehicle to 64 km/h (40 mph) or
more by depressing the accelerator pedal for at
least 10 seconds.
(9) Soon after performing step (8) above, release
the accelerator pedal for at least 4 seconds without
depressing the brake pedal in order to execute fuel-
cut control.
(10) Allow the vehicle to decelerate until the vehicle
speed declines to less than 10 km/h (6 mph).
(11) Repeat steps from (8) through (10) above at
least 3 times in one driving cycle.
(c) Monitor Status
(1) Check the Readiness Monitor status displayed
on the tester.
(2) If the status does not switch to COMPL
(complete), make sure that the preconditions
have been met, and then perform steps from (5)
through (11) in the Drive Pattern above.
5. AIR-FUEL RATIO (A/F) AND HEATED OXYGEN (HO2)
SENSOR HEATER MONITORS (FRONT A/F AND
REAR HO2 SENSOR TYPE)
A121604E06

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–31
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(a) Preconditions
The monitor will not run unless:
– The MIL is OFF.
(b) Drive Pattern
(1) Connect the intelligent tester to the DLC3.
(2) Turn the ignition switch ON.
(3) Turn the tester ON.
(4) Clear DTCs (if set) (see page ES-39).
(5) Start the engine.
(6) Allow the engine to idle for 10 minutes or more.
(7) Drive the vehicle at 40 km/h (25 mph) or more
for at least 2 minutes.
(c) Monitor Status
(1) Check the Readiness Monitor status displayed
on the tester.
If the status does not switch to COMPL
(complete), make sure that the preconditions
have been met, and repeat steps from (5) to (7)
described in the Drive Pattern above.

ES–322GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms are
listed in order of probability in the "Suspected area" column of
the table. Check each symptom by checking the suspected
areas in the order they are listed. Replace parts as
necessary.
Symptom Suspected area See page
Engine does not crank (Does not start)1. BatteryCH-5
2. StarterST-8
3. Starter relayST-16
4. Park/neutral position switchAX-132
5. Immobiliser systemEI-3
No initial combustion (Does not start)1. ECM power source circuitES-402
2. Crankshaft position sensorES-448
3. VVT sensorES-214
4. Ignition systemIG-5
5. Fuel pump control circuitES-414
6. ECMES-470
7. VC output circuitES-408
Engine cranks normally but difficult to start1. Fuel pump control circuitES-414
2. CompressionEM-3
Difficult to start with cold engine1. Ignition systemIG-5
2. Spark plugIG-7
3. Fuel pump control circuitES-414
4. InjectorFU-15
Difficult to start with warm engine1. InjectorFU-15
2. Ignition systemIG-5
3. Spark plugIG-7
4. Fuel pump control circuitES-414
High engine idle speed1. Electronic throttle control systemES-311
2. A/C signal circuit -
3. ECM power source circuitES-402
4. Acoustic Control Induction System (ACIS)ES-423
Low engine idle speed (Poor idling)1. Electronic throttle control systemES-311
2. A/C signal circuit -
3. Fuel pump control circuitES-414
4. Air induction systemIT-5
5. Acoustic Control Induction System (ACIS)ES-423
6. PCV hose -

ES–342GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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TERMINALS OF ECM
1. CHECK ECM
(a) Measure the voltage of the ECM connector.
HINT:
The standard normal voltage between each pair of
ECM terminals is shown in the table below. The
appropriate conditions for checking each pair of
terminals are also indicated. The result of checks
should be compared with the standard normal
voltage for that pair of terminals, displayed in the
Specified Condition column. The illustration above
can be used as a reference to identify the ECM
terminal locations.
A107881E05
Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
BATT (A9-20) - E1 (B30-81) W - BR Battery (for measuring
battery voltage and for
ECM memory)Always 9 to 14 V
+BM (A9-3) - E1 (B30-81) LG - BR Power source of throttle
actuatorAlways 9 to 14 V
IGSW (A9-28) - E1 (B30-81) B - BR Ignition switch Ignition switch ON 9 to 14 V
+B (A9-2) - E1 (B30-81) B - BR Power source of ECM Ignition switch ON 9 to 14 V
+B2 (A9-1) - E1 (B30-81) B - BR Power source of ECM Ignition switch ON 9 to 14 V
OC1+ (B30-58) - OC1- (B30-57) W - B Camshaft timing oil control
valve (OCV)Ignition switch ON Pulse generation (see
waveform 1)
OC2+ (B30-52) - OC2- (B30-51) BR - B Camshaft timing oil control
valve (OCV) (Intake side
(bank 2))Ignition switch ON Pulse generation
(see waveform 1)
OE1+ (B30-56) - OE1- (B30-55) R - LG Camshaft timing oil control
valve (OCV) (Exhaust side
(bank 1))Ignition switch ON Pulse generation
(see waveform 1)
OE2+ (B30-50) - OE2- (B30-49) W - B Camshaft timing oil control
valve (OCV) (Exhaust side
(bank 2))Ignition switch ON Pulse generation
(see waveform 1)
MREL (A9-44) - E1 (B30-81) O - BR EFI relay Ignition switch ON 9 to 14 V
VG (B30-72) - E2G (B30-73) GR - L-G Mass air flow meter Idling, Shift lever position P or N, A/
C switch OFF0.5 to 3.0 V
THA (B30-71) - ETHA (B30-74) P - G-R Intake air temperature
sensorIdling, Intake air temperature 20
C
(68F)0.5 to 3.4 V

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–39
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(g) WAVEFORM 6
Igniter IGT signal (from ECM to igniter) and
Igniter IGF signal (from igniter to ECM)
HINT:
The wavelength becomes shorter as the engine rpm
increases.
(h) WAVEFORM 7
Purge VSV
HINT:
If the waveform is not similar to the illustration,
check the waveform again after idling for 10 minutes
or more.
(i) WAVEFORM 8
Vehicle speed signal
HINT:
The wavelength becomes shorter as the vehicle
speed increases.
(j) WAVEFORM 9
Throttle actuator positive terminal
HINT:
The duty ratio varies depending on the throttle
actuator operation.
(k) WAVEFORM 10
Throttle actuator negative terminal
HINT:
The duty ratio varies depending on the throttle
actuator operation.
G035664E01
Symbol (Terminal No.) Between IGT (1 to 6) and E1
Between IGF1 and E1
Tester Range 2 V/DIV., 20 msec./DIV.
Condition Idling
A093230E01
Symbol (Terminal No.) Between PRG and E1
Tester Range 5 V/DIV., 50 msec./DIV.
Condition Idling
A093224E01
Symbol (Terminal No.) Between SPD and E1
Tester Range 2 V/DIV., 20 msec./DIV.
Condition Driving at 20 km/h (12 mph)
A093274E03
Symbol (Terminal No.) Between M+ and ME01
Tester Range 5 V/DIV., 1 msec./DIV.
Condition Idling with warm engine
A093275E03
Symbol (Terminal No.) Between M- and ME01
Tester Range 5 V/DIV., 1 msec./DIV.
Condition Idling with warm engine

ES–422GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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DIAGNOSIS SYSTEM
1. DESCRIPTION
When troubleshooting OBD II (On-Board Diagnostics)
vehicles, the intelligent tester (complying with SAE
J1987) must be connected to the DLC3 (Data Link
Connector 3) of the vehicle. Various data in the vehicle's
ECM (Engine Control Module) can be then read.
OBD II regulations require that the vehicle's on-board
computer illuminate the MIL (Malfunction Indicator
Lamp) on the instrument panel when the computer
detects a malfunction in:
(a) The emission control system components.
(b) The powertrain control components (which affect
vehicle emissions).
(c) The computer itself.
In addition, if the applicable DTCs (Diagnostic Trouble
Codes) prescribed by SAE J2012 are not recorded on 3
consecutive trips, the MIL turns off automatically but the
DTCs remain recorded in the ECM memory.
To check DTCs, connect the intelligent tester to the
DLC3. The tester displays DTCs, freeze frame data, and
a variety of the engine data. The DTCs and freeze frame
data can be erased with the tester (see page ES-39).
In order to enhance OBD function on vehicles and
develop the Off-Board diagnosis system, CAN
(Controller Area Network) communication is introduced
in this system. It minimizes the gap between technician
skills and vehicle technology. CAN is a network, which
uses a pair of data transmission lines, spanning multiple
computers and sensors. It allows high speed
communication between the systems and simplifies the
wire harness connection.
Since this system is equipped with the CAN
communication, connecting the CAN VIM (Vehicle
Interface Module) to the intelligent tester is necessary to
display any information from the ECM. (Also the
communication between the intelligent tester and the
ECM uses CAN communication signals.) When
confirming the DTCs and any data of the ECM, connect
the CAN VIM between the DLC3 and the intelligent
tester.
2. NORMAL MODE AND CHECK MODE
The diagnosis system operates in normal mode during
normal vehicle use. In normal mode, 2 trip detection
logic is used to ensure accurate detection of
malfunctions. Check mode is also available as an option
for technicians. In check mode, 1 trip detection logic is
used for simulating malfunction symptoms and
increasing the system's ability to detect malfunctions,
including intermittent problems (intelligent tester only)
(see page ES-42).
FI00534E01
B127989E01

ES–442GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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If communication is normal: Inspect the DLC3 on the
original vehicle.
If communication is still not possible: The problem is
probably in the tester itself. Consult the Service
Department listed in the instruction manual.
6. BATTERY VOLTAGE
Standard battery voltage:
11 to 14 V
If the voltage is below 11 V, replace or recharge the
battery before proceeding.
7. MIL (Malfunction Indicator Lamp)
(a) The MIL is illuminated when the ignition switch is
first turned ON (the engine is not running).
(b) The MIL should turn OFF when the engine is
started. If the MIL remains illuminated, the diagnosis
system has detected a malfunction or abnormality in
the system.
HINT:
If the MIL is not illuminated when the ignition switch
is first turned ON, check the MIL circuit (see page
ES-430).
8. ALL READINESS
For the vehicle, using the intelligent tester allows
readiness codes corresponding to all DTCs to be read.
When diagnosis (normal or malfunctioning) has been
complete, readiness codes are set. Select the following
menu items on the intelligent tester: ENHANCED OBD II
/ MONITOR STATUS.

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–45
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DTC CHECK / CLEAR
NOTICE:
When the diagnosis system is changed from normal
mode to check mode or vice versa, all DTCs and freeze
frame data recorded in normal mode are erased. Before
changing modes, always check and make a note of any
DTCs and freeze frame data.
HINT:
• DTCs which are stored in the ECM can be displayed on
the intelligent tester. The intelligent tester can display
current and pending DTCs.
• Some DTCs are not set if the ECM does not detect the
same malfunction again during a second consecutive
driving cycle. However, such malfunctions, detected on
only one occasion, are stored as pending DTCs.
1. CHECK DTC (Using intelligent tester)
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT
CODES or PENDING CODES.
(e) Check the DTC(s) and freeze frame data, and then
write them down.
(f) Check the details of the DTC(s) (see page ES-56).
2. CLEAR DTC (Using intelligent tester)
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CLEAR CODES.
(e) Press the YES button.
3. CLEAR DTC (Without using intelligent tester)
(a) Perform either of the following operations.
(1) Disconnect the cable from the negative (-)
battery terminal for more than 1 minute.
(2) Remove the EFI and ETCS fuses from the
engine room relay block (located inside the
engine compartment) for more than 1 minute.
B127989E01

ES–462GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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FREEZE FRAME DATA
1. DESCRIPTION
Freeze frame data records the engine conditions (fuel
system, calculated load, engine coolant temperature,
fuel trim, engine speed, vehicle speed, etc.) when a
malfunction is detected. When troubleshooting, it can
help determine if the vehicle was running or stopped, the
engine was warmed up or not, the air-fuel ratio was Lean
or Rich, and other data from the time the malfunction
occurred.
HINT:
If it is impossible to duplicate the problem even though a
DTC is detected, confirm the freeze frame data.
The ECM records engine conditions in the form of freeze
frame data every 0.5 seconds. Using the intelligent
tester, 5 separate sets of freeze frame data can be
checked.
– 3 data sets before the DTC was set.
– 1 data set when the DTC was set.
– 1 data set after the DTC was set.
These data sets can be used to simulate the condition
of the vehicle around the time of the occurrence of the
malfunction. The data may assist in identifying the
cause of the malfunction, and in judging whether it
was temporary or not.
2. LIST OF FREEZE FRAME DATA
A103809E11
LABEL
(Intelligent Tester Display)Measurement Item Diagnostic Note
INJECTOR Injection period of No. 1 cylinder -
IGN ADVANCE Ignition advance -
CALC LOAD Calculated load Calculated load by ECM
VEHICLE LOAD Vehicle load -
MAF Mass air flow volumeIf approximately 0.0 g/sec.:
• Mass air flow meter power source circuit
open or short
• VG circuit open or short
If 160.0 g/sec. or more:
• E2G circuit open
ENGINE SPD Engine speed -
VEHICLE SPD Vehicle speed Speed indicated on speedometer
COOLANT TEMP Engine coolant temperatureIf -40
C (-40F), sensor circuit open
If 140
C (284F) or more, sensor circuit
shorted
INTAKE AIR Intake air temperature If -40
C (-40F), sensor circuit open
If 140
C (284F) or more, sensor circuit
shorted
AIR-FUEL RATIO Ratio compared to stoichiometric level -
PURGE DENSITY Learning value of purge density -
EVAP PURGE FLOWRatio of evaporative purge flow to intake air
volume-
EVAP PURGE VSV EVAP purge VSV duty ratio -
KNOCK CRRT VAL Correction learning value of knocking -

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–47
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KNOCK FB VAL Feedback value of knocking -
ACCEL POS #1Absolute Accelerator Pedal Position (APP)
No.1-
ACCEL POS #2 Absolute APP No. 2 -
THROTTLE POS Throttle sensor positioning -
THROTTLE POS Throttle position -
THROTTLE POS #2 Throttle sensor positioning #2 -
THROTTLE MOT Throttle motor -
O2S B1 S2
O2S B2 S2Heated oxygen sensor outputPerforming INJ VOL or A/F CONTROL
function of ACTIVE TEST enables technician
to check output voltage of sensor
AFS B1 S1
AFS B2 S1A/F sensor outputPerforming INJ VOL or A/F CONTROL
function of ACTIVE TEST enables technician
to check output voltage of sensor
TOTAL FT #1
TOTAL FT #2Total fuel trim -
SHORT FT #1
SHORT FT #2Short-term fuel trimShort-term fuel compensation used to
maintain air-fuel ratio at stoichiometric air-fuel
ratio
LONG FT #1
LONG FT #2Long-term fuel trimOverall fuel compensation carried out in long-
term to compensate a continual deviation of
short-term fuel trim from central valve
O2FT B1 S2
O2FT B2 S2Fuel trim at heated oxygen sensor -
AF FT B1 S1
AF FT B2 S1Fuel trim at A/F sensor-
AFS B1 S1
AFS B2 S1A/F sensor current-
CAT TEMP B1S1
CAT TEMP B2S1Estimated catalyst temperature (sensor 1)-
CAT TEMP B1S2
CAT TEMP B2S2Estimated catalyst temperature (sensor 2)-
S O2S B1S2
S O2S B2S2Sub heated oxygen sensor impedance
(sensor 2)-
INI COOL TEMP Engine coolant temperature at engine start -
INI INTAKE TEMP Intake air temperature at engine start -
INJ VOL Injection volume -
STARTER SIG Starter switch (STSW) signal -
PS SW Power steering signal -
PS SIGNAL Power steering signal (history)Signal status usually ON until ignition switch
turned OFF
CTP SW Closed throttle position switch -
A/C SIGNAL A/C signal -
PNP SW (NSW) Park/Neutral Position (PNP) switch signal -
ELECT LOAD SIG Electrical load signal -
STOP LIGHT SW Stop light switch -
BATTERY VOLTAGE Battery voltage -
ATM PRESSURE Atmosphere pressure -
FUEL PMP SP CTL Fuel pump speed control status -
ACIS VSVVSV for Acoustic Control Induction System
(ACIS)-
EVAP (Purge) VSV EVAP Purge VSV -
FUEL PUMP/SPD Fuel pump/speed status -LABEL
(Intelligent Tester Display)Measurement Item Diagnostic Note