ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-105
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
The B counter will be counted up when driving pattern B is satisfied without any malfunction.
The MI will go off when the B counter reaches 3. (*2 in “OBD SYSTEM OPERATION CHART”)
Driving pattern C means the vehicle operation as follows:
The following conditions should be satisfied at the same time:
Engine speed: (Engine speed in the freeze frame data) ±375 rpm
Calculated load value: (Calculated load value in the freeze frame data) x (1±0.1) [%]
Engine coolant temperature (T) condition:
When the freeze frame data shows lower than 70°C (158°F), T should be lower than 70°C (158°F).
When the freeze frame data shows higher than or equal to 70°C (158°F), T should be higher than or equal to
70°C (158°F).
Example:
If the stored freeze frame data is as follows:
Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80°C (176°F)
To be satisfied with driving pattern C, the vehicle should run under the following conditions:
Engine speed: 475 - 1,225 rpm, Calculated load value: 27 - 33%, Engine coolant temperature: more than 70°C
(158°F)
The C counter will be cleared when the malfunction is detected regardless of vehicle conditions above.
The C counter will be counted up when vehicle conditions above is satisfied without the same malfunction.
The DTC will not be displayed after C counter reaches 80.
The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC is
stored in ECM.
Relationship Between MI, DTC, 1st Trip DTC and Driving Patterns Except For “Misfire
EC-106
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Explanation for Driving Patterns Except for “Misfire
*1: When the same malfunction is de-
tected in two consecutive trips, MI will
light up.*2: MI will go off after vehicle is driven 3
times (pattern B) without any mal-
functions.*3: When the same malfunction is de-
tected in two consecutive trips, the
DTC and the freeze frame data will be
stored in ECM.
*4: The DTC and the freeze frame data
will not be displayed any longer after
vehicle is driven 40 times (pattern A)
without the same malfunction.
(The DTC and the freeze frame data
still remain in ECM.)*5: When a malfunction is detected for
the first time, the 1st trip DTC and the
1st trip freeze frame data will be
stored in ECM.*6: 1st trip DTC will be cleared after vehi-
cle is driven once (pattern B) without
the same malfunction.
*7: When the same malfunction is de-
tected in the 2nd trip, the 1st trip
freeze frame data will be cleared.
SEF393SD
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-107
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.
The DTC will not be displayed after the A counter reaches 40.
Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
The B counter will be counted up when driving pattern B is satisfied without any malfunctions.
The MI will go off when the B counter reaches 3 (*2 in OBD SYSTEM OPERATION CHART).
CONSULT-III FunctionINFOID:0000000001161172
FUNCTION
*: The following emission-related diagnostic information is cleared when the ECM memory is erased.
Diagnostic trouble codes
1st trip diagnostic trouble codes
Freeze frame data
1st trip freeze frame data
System readiness test (SRT) codes
Test values
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
AEC574
Diagnostic test mode Function
Work supportThis mode enables a technician to adjust some devices faster and more accurately by following the in-
dications on the CONSULT-III unit.
Self-diagnostic resultsSelf-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.*
Data monitor Input/Output data in the ECM can be read.
Active testDiagnostic Test Mode in which CONSULT-III drives some actuators apart from the ECMs and also shifts
some parameters in a specified range.
DTC & SRT confirmation The status of system monitoring tests and the self-diagnosis status/result can be confirmed.
Function test This mode is used to inform customers when their vehicle condition requires periodic maintenance.
ECU part number ECM part number can be read.
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-109
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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WORK SUPPORT MODE
Work Item
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding items of DTC and 1st trip DTC, refer to EC-361, "DTCIndex".)
Freeze Frame Data and 1st Trip Freeze Frame Data
*: The items are the same as those of 1st trip freeze frame data.WORK ITEM CONDITION USAGE
FUEL PRESSURE RELEASE FUEL PUMP WILL STOP BY TOUCHING “START” DUR-
ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.When releasing fuel pressure from
fuel line
IDLE AIR VOL LEARN THE IDLE AIR VOLUME THAT KEEPS THE ENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.When learning the idle air volume
SELF-LEARNING CONT THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.When clearing mixture ratio self-
learning value
TARGET IDLE RPM ADJ* IDLE CONDITIONWhen setting target idle speed
TARGET IGN TIM ADJ* IDLE CONDITION When adjusting target ignition tim-
ing
Freeze frame data
item*Description
DIAG TROUBLE
CODE
[PXXXX] The engine control component part/control system has a trouble code, it is displayed as PXXXX. (Refer to
EC-361, "
DTCIndex".)
FUEL SYS-B1 “Fuel injection system status” at the moment a malfunction is detected is displayed.
One mode in the following is displayed.
Mode2: Open loop due to detected system malfunction
Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)
Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control
Mode5: Open loop - has not yet satisfied condition to go to closed loop
CAL/LD VALUE [%] The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [°C]
or [°F] The engine coolant temperature at the moment a malfunction is detected is displayed.
L-FUEL TRM-B1 [%] “Long-term fuel trim” at the moment a malfunction is detected is displayed.
The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule than
short-term fuel trim.
S-FUEL TRM-B1 [%] “Short-term fuel trim” at the moment a malfunction is detected is displayed.
The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel sched-
ule.
ENGINE SPEED [rpm] The engine speed at the moment a malfunction is detected is displayed.
VEHICL SPEED
[km/h] or [mph] The vehicle speed at the moment a malfunction is detected is displayed.
ABSOL TH·P/S [%] The throttle valve opening angle at the moment a malfunction is detected is displayed.
B/FUEL SCHDL
[msec] The base fuel schedule at the moment a malfunction is detected is displayed.
INT/A TEMP SE [°C]
or [°F] The intake air temperature at the moment a malfunction is detected is displayed.
INT MANI PRES [kPa] Always a certain value is displayed.
This item is not efficient for C11 models.
EC-110
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
DATA MONITOR MODE
Monitored Item
×: Applicable
Monitored item Unit Description Remarks
ENG SPEED rpm Indicates the engine speed computed from the
signal of the crankshaft position sensor (POS)
and camshaft position sensor (PHASE). Accuracy becomes poor if engine
speed drops below the idle rpm.
If the signal is interrupted while the
engine is running, an abnormal value
may be indicated.
MAS A/F SE-B1 V The signal voltage of the mass air flow sensor is
displayed. When the engine is stopped, a certain
value is indicated.
When engine is running specification
range is indicated in “SPEC”.
B/FUEL SCHDL msec “Base fuel schedule” indicates the fuel injection
pulse width programmed into ECM, prior to any
learned on board correction. When engine is running specification
range is indicated in “SPEC”.
A/F ALPHA-B1 % The mean value of the air-fuel ratio feedback cor-
rection factor per cycle is indicated. When the engine is stopped, a certain
value is indicated.
When engine is running specification
range is indicated in “SPEC”.
This data also includes the data for
the air-fuel ratio learning control.
COOLAN TEMP/S°C or °F The engine coolant temperature (determined by
the signal voltage of the engine coolant tempera-
ture sensor) is displayed. When the engine coolant temperature
sensor is open or short-circuited,
ECM enters fail-safe mode. The en-
gine coolant temperature determined
by the ECM is displayed.
HO2S1 (B1) V The signal of the heated oxygen sensor 1 is dis-
played.
HO2S2 (B1) V The signal voltage of the heated oxygen sensor 2
is displayed.
HO2S1 MNTR(B1) RICH/LEAN Display of heated oxygen sensor 1 signal during
air-fuel ratio feedback control:
RICH: means the mixture became ″rich″, and
control is being affected toward a leaner mixture.
LEAN: means the mixture became ″lean″, and
control is being affected toward a rich mixture. After turning ON the ignition switch,
″RICH″ is displayed until air-fuel mix-
ture ratio feedback control begins.
When the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continuously.
HO2S2 MNTR(B1) RICH/LEAN Display of heated oxygen sensor 2 signal:
RICH: means the amount of oxygen after three
way catalyst is relatively small.
LEAN: means the amount of oxygen after three
way catalyst is relatively large. When the engine is stopped, a certain
value is indicated.
VHCL SPEED SE km/h or mph The vehicle speed computed from the vehicle
speed signal sent from combination meter is dis-
played.
BATTERY VOLT V The power supply voltage of ECM is displayed.
ACCEL SEN 1
V The accelerator pedal position sensor signal volt-
age is displayed. ACCEL SEN 2 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal. ACCEL SEN 2
TP SEN 1-B1
V The throttle position sensor signal voltage is dis-
played. TP SEN 2-B1 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal. TP SEN 2-B1
INT/A TEMP SE°
C or °F The intake air temperature (determined by the
signal voltage of the intake air temperature sen-
sor) is indicated.
START SIGNAL ON/OFF Indicates start signal status [ON/OFF] computed
by the ECM according to the signals of engine
speed and battery voltage. After starting the engine, [OFF] is dis-
played regardless of the starter sig-
nal.
EC-112
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
COOLING FAN HI/LOW/OFF Indicates the condition of the cooling fan (deter-
mined by ECM according to the input signals).
HI: High speed operation
LOW: Low speed operation
OFF: Stop
HO2S1 HTR (B1) ON/OFF Indicates [ON/OFF] condition of heated oxygen
sensor 1 heater determined by ECM according to
the input signals.
HO2S2 HTR (B1) ON/OFF Indicates [ON/OFF] condition of heated oxygen
sensor 2 heater determined by ECM according to
the input signals.
I/P PULLY SPD rpm Indicates the engine speed computed from the
turbine revolution sensor signal.
VEHICLE SPEED km/h or mph Indicates the vehicle speed computed from the
vehicle speed signal sent from TCM is displayed.
IDL A/V LEARN YET/CMPLT Display the condition of Idle Air Volume Learning
YET: Idle air volume learning has not been per-
formed yet.
CMPLT: Idle air volume learning has already
been performed successfully.
TRVL AFTER MIL km or mile Distance traveled while MI is activated.
O2 SEN HTR DTY % Heated oxygen sensor 1 heater control value
computed by ECM according to the input signals.
The current flow to the heater becomes larger as
the value increases.
AC PRESS SEN V The signal voltage from the refrigerant pressure
sensor is displayed.
VHCL SPEED SE km/h or mph The vehicle speed computed from the vehicle
speed signal sent from combination meter is dis-
played.
SET VHCL SPD km/h or mph The preset vehicle speed is displayed.
MAIN SW ON/OFF Indicates [ON/OFF] condition from MAIN switch
signal.
CANCEL SW ON/OFF Indicates [ON/OFF] condition from CANCEL
switch signal.
RESUME/ACC SW ON/OFF Indicates [ON/OFF] condition from RESUME/AC-
CELERATE switch signal.
SET SW ON/OFF Indicates [ON/OFF] condition from SET/COAST
switch signal.
BRAKE SW1 ON/OFF Indicates [ON/OFF] condition from ASCD brake
switch or ASCD clutch switch signal.
BRAKE SW2 ON/OFF Indicates [ON/OFF] condition of stop lamp switch
signal.
VHCL SPD CUT NON/CUT Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD
set speed.
CUT: Vehicle speed decreased to excessively
low compared with the ASCD set speed, and
ASCD operation is cut off.
LO SPEED CUT NON/CUT Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD
set speed.
CUT: Vehicle speed decreased to excessively
low, and ASCD operation is cut off.
AT OD MONITOR ON/OFF Indicates the [ON/OFF] condition of A/T O/D ac-
cording to the input signal from the TCM. Monitored item Unit Description Remarks
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-113
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.
DTC & SRT CONFIRMATION MODE
SRT STATUS Mode
For details, refer to EC-94, "Diagnosis Description".
SRT WORK SUPPORT Mode
AT OD CANCEL ON/OFF Indicates the [ON/OFF] condition of A/T O/D can-
cel to the input signal from the TCM.
CRUISE LAMP ON/OFF Indicates [ON/OFF] condition of CRUISE lamp
determined by the ECM according to the input
signals.
SET LAMP ON/OFF Indicates [ON/OFF] condition of SET lamp deter-
mined by the ECM according to the input signals. Monitored item Unit Description Remarks
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
FUEL INJECTION Engine: Return to the original
trouble condition
Change the amount of fuel injec-
tion using CONSULT-III.If trouble symptom disappears, see
CHECK ITEM. Harness and connectors
Fuel injector
Heated oxygen sensor 1
IGNITION TIMING Engine: Return to the original
trouble condition
Timing light: Set
Retard the ignition timing using
CONSULT-III.If trouble symptom disappears, see
CHECK ITEM. Perform Idle Air Volume Learn-
ing.
POWER BALANCE Engine: After warming up, idle the
engine.
A/C switch OFF
Shift lever: Neutral
Cut off each fuel injector signal
one at a time using CONSULT-III.Engine runs rough or dies. Harness and connectors
Compression
Fuel injector
Power transistor
Spark plug
Ignition coil
COOLING FAN* Ignition switch: ON
Turn the cooling fan “LOW”, “HI”
and “OFF” CONSULT-III.Cooling fan moves and stops. Harness and connectors
IPDM E/R (Cooling fan relay)
Cooling fan motor
ENG COOLANT
TEMP Engine: Return to the original
trouble condition
Change the engine coolant tem-
perature using CONSULT-III.If trouble symptom disappears, see
CHECK ITEM. Harness and connectors
Engine coolant temperature
sensor
Fuel injector
FUEL PUMP RELAY Ignition switch: ON (Engine
stopped)
Turn the fuel pump relay “ON”
and “OFF” using CONSULT-III
and listen to operating sound.Fuel pump relay makes the operat-
ing sound. Harness and connectors
Fuel pump relay
PURG VOL CONT/V Engine: After warming up, run en-
gine at 1,500 rpm.
Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-III.Engine speed changes according
to the opening percent. Harness and connectors
Solenoid valve
V/T ASSIGN ANGLE Engine: Return to the original
trouble condition
Change intake valve timing using
CONSULT-III.If trouble symptom disappears, see
CHECK ITEM. Harness and connectors
Intake valve timing control sole-
noid valve
EC-116
< COMPONENT DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
COMPONENT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:0000000001670886
The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONI-
TOR” mode of CONSULT-III during normal operation of the Engine Control System. When the value in “SPEC”
of “DATA MONITOR” mode is within the SP value, the Engine Control System is confirmed OK. When the
value in “SPEC” of “DATA MONITOR” mode is NOT within the SP value, the Engine Control System may have
one or more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MI.
The SP value will be displayed for the following three items:
B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc-
tion)
A/F ALPHA-B1 (The mean value of air-fuel ratio feedback correction factor per cycle)
MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Component Function CheckINFOID:0000000001670887
1.START
Make sure that all of the following conditions are satisfied.
Vehicle driven distance: More than 5,000 km (3,107 miles)
Barometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm
2, 14.25 - 15.12 psi)
Atmospheric temperature: 20 - 30°C (68 - 86°F)
Engine coolant temperature: 75 - 95°C (167 - 203°F)
Transmission: Warmed-up
- After the engine is warmed up to normal operating temperature, drive vehicle for 5 minutes.
Electrical load: Not applied*
Engine speed: Idle
*: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
>> GO TO 2.
2.PERFORM “SPEC” OF “DATA MONITOR” MODE
With CONSULT-III
NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1. Perform EC-22, "
BASIC INSPECTION : Special Repair Requirement".
2. Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode
with CONSULT-III.
3. Make sure that monitor items are within the SP value.
Is the inspection result normal?
YES >> END
NO >> Go to EC-117, "
Diagnosis Procedure".