TROUBLE DIAGNOSIS
EC-115
< SERVICE INFORMATION >
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P OINT/V SOL (B1) [%]• The control value of the intake valve timing
control solenoid valve (determined by ECM ac-
cording to the input signal) is indicated.
• The advance angle becomes larger as the val-
ue increases
AIR COND RLY
[ON/OFF]ו The air conditioner relay control condition (de-
termined by ECM according to the input sig-
nals) is indicated.
FUEL PUMP RLY
[ON/OFF]ו Indicates the fuel pump relay control condition
determined by ECM according to the input sig-
nals.
VENT CONT/V [ON/
OFF]• The control condition of the EVAP canister vent
control valve (determined by ECM according to
the input signals) is indicated.
ON: Closed
OFF: Open
THRTL RELAY
[ON/OFF]ו Indicates the throttle control motor relay control
condition determined by the ECM according to
the input signals.
COOLING FAN
[HI/LOW/OFF]ו Indicates the condition of the cooling fan (de-
termined by ECM according to the input sig-
nals).
HI: High speed operation
LOW: Low speed operation
OFF: Stop
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]ו 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
performed yet.
CMPLT: Idle Air Volume Learning has already
been performed successfully.
TRVL AFTER MIL
[km] or [mile]• Distance traveled while MIL is activated.
A/F S1 HTR (B1) [%]• Indicates A/F sensor 1 heater control value
computed by ECM according to the input sig-
nals.
• The current flow to the heater becomes larger
as the value increases.
AC PRESS SEN [V]ו The signal voltage from the refrigerant pres-
sure sensor is displayed.
VHCL SPEED SE
[km/h] or [MPH]• The vehicle speed computed from the vehicle
speed signal sent from TCM is displayed.
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. Monitored item [Unit]ECM IN-
PUT SIG-
NALSMAIN
SIG-
NALSDescription Remarks
EC-116
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
DATA MONITOR (SPEC) MODE
Monitored Item
RESUME/ACC SW
[ON/OFF]• Indicates [ON/OFF] condition from RESUME/
ACCELERATE 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 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 increased to excessively
high 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 compared with the ASCD set speed, and
ASCD operation is cut off.
AT O D M O N I T O R
[ON/OFF]• Indicates [ON/OFF] condition of A/T O/D ac-
cording to the input signal from the TCM.• For M/T models always “OFF” is
displayed
AT OD CANCEL
[ON/OFF]• Indicates [ON/OFF] condition of A/T O/D can-
cel signal sent from the TCM.• For M/T models always “OFF” is
displayed
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 de-
termined by the ECM according to the input
signals.
A/F ADJ-B1 • Indicates the correction factor stored in ECM.
The factor is calculated from the difference be-
tween the target air/fuel ratio stored in ECM
and the air/fuel ratio calculated from air fuel ra-
tio (A/F) sensor 1 signal. A/F ADJ-B2
Voltage [V]
• Voltage, frequency, duty cycle or pulse width
measured by the probe.• Only “#” is displayed if item is un-
able to be measured.
• Figures with “#”s are temporary
ones. They are the same figures
as an actual piece of data which
was just previously measured. Frequency
[msec], [Hz] or [%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOWMonitored item [Unit]ECM IN-
PUT SIG-
NALSMAIN
SIG-
NALSDescription Remarks
TROUBLE DIAGNOSIS
EC-117
< SERVICE INFORMATION >
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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
Monitored item [Unit]ECM
input
signalsMain
signalsDescription Remarks
ENG SPEED [rpm]×ו Indicates the engine speed computed
from the signal of the crankshaft position
sensor (POS) and camshaft position
sensor (PHASE).
MAS A/F SE-B1 [V]×ו The signal voltage of the mass air flow
sensor specification is displayed.• When engine is running specification
range is indicated.
B/FUEL SCHDL
[msec]ו “Base fuel schedule” indicates the fuel in-
jection pulse width programmed into
ECM, prior to any learned on board cor-
rection.• When engine is running specification
range is indicated.
A/F ALPHA-B1 [%]ו The mean value of the air-fuel ratio feed-
back correction factor per cycle is indi-
cated.• When engine is running specification
range is indicated.
• This data also includes the data for the
air-fuel ratio learning control.
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
FUEL INJEC-
TION• Engine: Return to the original
trouble condition
• Change the amount of fuel injec-
tion using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1
IGNITION TIM-
ING• Engine: Return to the original
trouble condition
• Timing light: Set
• Retard the ignition timing using
CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.• Perform Idle Air Volume Learning.
POWER BAL-
ANCE• Engine: After warming up, idle the
engine.
• A/C switch OFF
• Shift lever: P or N (A/T, CVT),
Neutral (M/T)
• Cut off each fuel injector signal
one at a time using CONSULT-II.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” with CONSULT-II.Cooling fan moves and stops.• Harness and connectors
• Cooling fan relay
• Cooling fan motor
ENG COOLANT
TEMP• Engine: Return to the original
trouble condition
• Change the engine coolant tem-
perature using CONSULT-II.If trouble symptom disappears, see
CHECK ITEM.• Harness and connectors
• Engine coolant temperature sen-
sor
• Fuel injector
FUEL PUMP RE-
LAY• Ignition switch: ON
(Engine stopped)
• Turn the fuel pump relay ON and
OFF using CONSULT-II and lis-
ten 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-II.Engine speed changes according to
the opening percent.• Harness and connectors
• EVAP canister purge volume con-
trol solenoid valve
TROUBLE DIAGNOSIS
EC-121
< SERVICE INFORMATION >
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3. Turn ignition switch ON.
4. Enter the program according to instruction on the screen or in
the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.)
5. Perform each diagnostic service according to each service pro-
cedure.
For further information, see the GST Operation Manual of
the tool maker.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000001702597
Remarks:
● Specification data are reference values.
● Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the specification data in spite of the
ignition timing not being adjusted to the specification data. This IGN TIMING monitors the data calculated by the ECM according to the signals
input from the camshaft position sensor and other ignition timing related sensors.
SEF398S
SEF416S
MONITOR ITEM CONDITION SPECIFICATION
ENG SPEED • Run engine and compare CONSULT-II value with the tachometer indication.Almost the same speed as the
tachometer indication.
MAS A/F SE-B1 See EC-127
.
B/FUEL SCHDL See EC-127
.
A/F ALPHA-B1 See EC-127
.
COOLAN TEMP/S • Engine: After warming up More than 70°C (158°F)
A/F SEN1 (B1) • Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2V
HO2S2 (B1)• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and
at idle for 1 minute under no load 0 - 0.3V ←→ Approx. 0.6 -
1.0V
HO2S2 MNTR (B1)LEAN ←→ RICH
VHCL SPEED SE• Turn drive wheels and compare CONSULT-II value with the speedometer
indication.Almost the same speed as the
speedometer indication.
BATTERY VOLT • Ignition switch: ON (Engine stopped) 11 - 14V
ACCEL SEN 1
ACCEL SEN 2*• Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.6 - 0.9V
Accelerator pedal: Fully depressed 4.0 - 4.8V
EVAP SYS PRES • Ignition switch: ON Approx. 1.8 - 4.8V
EC-124
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ from
ECM terminals voltage signal.
Major Sensor Reference Graph in Data Monitor ModeINFOID:0000000001702598
The following are the major sensor reference graphs in “DATA MONITOR” mode.
CLSD THL POS, ACCEL SEN 1, THRTL SEN 1
Below is the data for “CLSD THL POS”, “ACCEL SEN 1” and “THRTL SEN 1” when depressing the accelera-
tor pedal with the ignition switch ON and with shift lever in D position (A/T, CVT), 1st position (M/T).
The signal of “ACCEL SEN 1” and “THRTL SEN 1” should rise gradually without any intermittent drop or rise
after “CLSD THL POS” is changed from ON to OFF.
ENG SPEED, MAS A/F SE-B1, THRTL SEN 1, HO2S2 (B1), INJ PULSE-B1
Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL SEN 1”, “HO2S2 (B1)” and “INJ PULSE-B1”
when revving engine quickly up to 4,800 rpm under no load after warming up engine sufficiently.
BRAKE SW1 • Ignition switch: ON• Brake pedal: Fully released (A/T,
CVT)
• Brake pedal and clutch pedal: Fully
released (M/T)ON
• Brake pedal: Slightly depressed
(A/T, CVT)
• Brake pedal and/or clutch pedal:
Slightly depressed (M/T)OFF
BRAKE SW2 • Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
CRUISE LAMP • Ignition switch: ONMAIN switch: Pressed at the 1st time →
at the 2nd timeON → OFF
SET LAMP• MAIN switch: ON
• Vehicle speed: Between 40 km/h
(25 MPH) and 144 km/h (89
MPH)ACSD: Operating ON
ASCD: Not operating OFF MONITOR ITEM CONDITION SPECIFICATION
PBIB0198E
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-127
< SERVICE INFORMATION >
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:0000000001702599
The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” 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
MIL.
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)
Testing ConditionINFOID:0000000001702600
• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (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
- A/T and CVT models: After the engine is warmed up to normal operating temperature, drive vehicle until
“FLUID TEMP SE” (A/T or CVT) fluid temperature sensor signal) indicates more than 60°C (140°F).
- M/T models: After the engine is warmed up to normal operating temperature, drive vehicle for 5 minutes.
• Electrical load: Not applied
- Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
• Engine speed: Idle
Inspection ProcedureINFOID:0000000001702601
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1. Perform EC-69, "
Basic Inspection".
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MAS A/F SE-
B1” in “DATA MONITOR (SPEC)” mode with CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go to EC-127, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001702602
OVERALL SEQUENCE
SEF601Z
EC-132
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
12.CHECK A/F SENSOR 1 FUNCTION
Perform all DTC Confirmation Procedure related with A/F sensor 1.
• For DTC P0130, refer to EC-206, "
DTC Confirmation Procedure".
• For DTC P0131, refer to EC-213, "
DTC Confirmation Procedure".
• For DTC P0132, refer to EC-219, "
DTC Confirmation Procedure".
• For DTC P0133, refer to EC-225, "
DTC Confirmation Procedure".
• For DTC P2A00, refer to EC-500, "
DTC Confirmation Procedure".
OK or NG
OK >> GO TO 15.
NG >> GO TO 13.
13.CHECK A/F SENSOR 1 CIRCUIT
Perform Diagnostic Procedure according to corresponding DTC.
>> GO TO 14.
14.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “DATA MONITOR (SPEC)” mode, and make sure that the indication is within
the SP value.
OK or NG
OK >>INSPECTION END
NG >> GO TO 15.
15.DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect ECM harness connector. Check pin terminal and connector for damage, and then reconnect it.
>> GO TO 16.
16.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “DATA MONITOR (SPEC)” mode, and make sure that the indication is within
the SP value.
OK or NG
OK >>INSPECTION END
NG >> Detect malfunctioning part according to EC-88, "
Symptom Matrix Chart".
17.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and
make sure that the indication is within the SP value.
OK or NG
OK >>INSPECTION END
NG (More than the SP value)>>GO TO 18.
NG (Less than the SP value)>>GO TO 25.
18.DETECT MALFUNCTIONING PART
1. Check for the cause of large engine friction. Refer to the following.
- Engine oil level is too high
- Engine oil viscosity
- Belt tension of alternator, A/C compressor, etc. is excessive
- Noise from engine
PBIB2332E
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-133
< SERVICE INFORMATION >
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- Noise from transmission, etc.
2. Check for the cause of insufficient combustion. Refer to the following.
- Valve clearance malfunction
- Intake valve timing control function malfunction
- Camshaft sprocket installation malfunction, etc.
>> Repair or replace malfunctioning part, and then GO TO 30.
19.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
• Crushed air ducts
• Malfunctioning seal of air cleaner element
• Uneven dirt of air cleaner element
• Improper specification of intake air system
OK or NG
OK >> GO TO 21.
NG >> Repair or replace malfunctioning part, and then GO TO 20.
20.CHECK “A/F ALPHA-B1” AND “B/FUEL SCHDL”
Select “A/F ALPHA-B1” and “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and make sure that the
each indication is within the SP value.
OK or NG
OK >>INSPECTION END
NG (“B/FUEL SCHDL” is more, “A/F ALPHA-B1” is less than the SP value)>>GO TO 21.
21.DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect mass air flow sensor harness connector. Check pin terminal and connector for damage and
then reconnect it again.
>> GO TO 22.
22.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “DATA MONITOR (SPEC)” mode, and make sure that the indication is within
the SP value.
OK or NG
OK >> 1. Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to EC-167.
2. GO TO 29.
NG >> GO TO 23.
23.CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode, and
make sure that the indication is within the SP value.
OK or NG
OK >> GO TO 24.
NG (More than the SP value)>>Replace mass air flow sensor, and
then GO TO 29.
24.REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs.
Refer to BL-211, "
ECM Re-communicating Function".
PBIB2370E