INTAKE VALVE TIMING CONTROL
EC-93
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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Component DescriptionINFOID:0000000001161170
1. ASCD steering switch 2. MAIN switch 3. CANCEL switch
4. SET/COAST switch 5. RESUME/ACCELERATE switch 6. ASCD brake switch
7. Stop lamp switch 8. ASCD clutch switch 9. Clutch pedal
ALBIA0273ZZ
Component Reference
Camshaft position sensor (PHASE)EC-201, "
Description"
Crankshaft position sensor (POS)EC-197, "Description"
Engine coolant temperature sensorEC-142, "Description"
Intake valve timing control solenoid valveEC-219, "Description"
Vehicle speed sensorEC-213, "Description"
EC-94
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Diagnosis DescriptionINFOID:0000000001161171
INTRODUCTION
The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:
The above information can be checked using procedures listed in the table below.
×: Applicable —: Not applicable
*: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.
The malfunction indicator lamp (MI) on the instrument panel lights up when the same malfunction is detected
in two consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to EC-358,
"FailSafe".)
TWO TRIP DETECTION LOGIC
When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MI will not light up at this stage. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in
the ECM memory, and the MI lights up. The MI lights up at the same time when the DTC is stored. <2nd trip>
The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed during
vehicle operation. Specific on board diagnostic items will cause the ECM to light up or blink the MI, and store
DTC and Freeze Frame data, even in the 1st trip, as shown below.
×: Applicable —: Not applicable
DTC AND FREEZE FRAME DATA
DTC and 1st Trip DTC
Emission-related diagnostic information Diagnostic service
Diagnostic Trouble Code (DTC) Service $03 of ISO 15031-5
Freeze Frame data Service $02 of ISO 15031-5
System Readiness Test (SRT) code Service $01 of ISO 15031-5
1st Trip Diagnostic Trouble Code (1st Trip DTC) Service $07 of ISO 15031-5
1st Trip Freeze Frame data
Test values and Test limits Service $06 of ISO 15031-5
DTC 1st trip DTCFreeze Frame
data1st trip Freeze
Frame dataSRT code Test value
CONSULT-III×××××—
GST×××—××
ECM××*————
ItemsMI DTC 1st trip DTC
1st trip 2nd trip
1st trip
displaying2nd trip
displaying1st trip
displaying2nd trip
display-
ing BlinkingLighting
upBlinkingLighting
up
Misfire (Possible three way catalyst
damage) — DTC: P0300 - P0304 is
being detected×———— —×—
Misfire (Possible three way catalyst
damage) — DTC: P0300 - P0304 is
being detected——×——×——
One trip detection diagnoses (Re-
fer to EC-361, "
DTCIndex".)—×——×———
Except above — — —×—××—
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-97
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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If, during the state emissions inspection, the SRT indicates “CMPLT” for all test items, the inspector will con-
tinue with the emissions test. However, if the SRT indicates “INCMP” for one or more of the SRT items the
vehicle is returned to the customer untested.
NOTE:
If MI is ON during the state emissions inspection, the vehicle is also returned to the customer untested even
though the SRT indicates “CMPLT” for all test items. Therefore, it is important to check SRT (“CMPLT”) and
DTC (No DTCs) before the inspection.
SRT Item
The table below shows required self-diagnostic items to set the SRT to “CMPLT”.
*: If completion of several SRTs is required, perform driving patterns (DTC CONFIRMATION PROCEDURE), one by one based on the
priority for models with CONSULT-III.
SRT Set Timing
SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is
done regardless of whether the result is OK or NG. The set timing is different between OK and NG results and
is shown in the table below.
OK: Self-diagnosis is carried out and the result is OK.
NG: Self-diagnosis is carried out and the result is NG.
—: Self-diagnosis is not carried out.
When all SRT related self-diagnoses showed OK results in a single cycle (Ignition OFF-ON-OFF), the SRT will
indicate “CMPLT”. → Case 1 above
SRT item
(CONSULT-III indication)Performance
Priority*Required self-diagnostic items to set the SRT to “CMPLT”Corresponding
DTC No.
CATALYST 2 Three way catalyst function P0420
HO2S 1 Heated oxygen sensor 1 P0133
Heated oxygen sensor 1 P1143
Heated oxygen sensor 1 P1144
Heated oxygen sensor 2 P0139
Heated oxygen sensor 2 P1146
HO2S HTR 1Heated oxygen sensor 1 heater P0135
Heated oxygen sensor 2 heater P0141
Self-diagnosis resultExample
DiagnosisIgnition cycle
← ON →OFF← ON →OFF← ON →OFF← ON →
All OK Case 1 P0400 OK (1) — (1) OK (2) — (2)
P0402 OK (1) — (1) — (1) OK (2)
P1402 OK (1) OK (2) — (2) — (2)
SRT of EGR “CMPLT” “CMPLT” “CMPLT” “CMPLT”
Case 2 P0400 OK (1) — (1) — (1) — (1)
P0402 — (0) — (0) OK (1) — (1)
P1402 OK (1) OK (2) — (2) — (2)
SRT of EGR “INCMP” “INCMP” “CMPLT” “CMPLT”
NG exists Case 3 P0400 OK OK — —
P0402 — — — —
P1402 NG — NGNG
(Consecutive
NG)
(1st trip)
DTC1st trip DTC — 1st trip DTCDTC
(= MI ON)
SRT of EGR “INCMP” “INCMP” “INCMP” “CMPLT”
EC-100
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
MI Flashing Without DTC
If the ECM is in Diagnostic Test Mode II, MI may flash when engine is running. In this case, check ECM diag-
nostic test mode. How to switch the diagnostic test function modes, and details of the above functions are
described later.
The following emission-related diagnostic information is cleared when the ECM memory is erased.
Diagnostic trouble code
1st trip diagnostic trouble code
Freeze frame data
1st trip freeze frame data
System readiness test (SRT) codes
Test values
Diagnostic Test Mode I — Bulb Check
In this mode, the MI on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to EC-
324, "Component Function Check".
Diagnostic Test Mode I — Malfunction Warning
This DTC number is clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)
Diagnostic Test Mode II — Self-diagnostic Results
In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MI as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MI does not illuminate in diagnostic test mode
I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the MI illumi-
Diagnostic Test
ModeKEY and ENG.
StatusFunction Explanation of Function
Mode I Ignition switch in
ON position
Engine stoppedBULB CHECK This function checks the MI bulb for damage (blown, open
circuit, etc.).
If the MI does not come on, check MI circuit.
Engine running MALFUNCTION
WARNINGThis is a usual driving condition. When a malfunction is de-
tected twice in two consecutive driving cycles (two trip de-
tection logic), the MI will light up to inform the driver that a
malfunction has been detected.
The following malfunctions will light up or blink the MI in the
1st trip.
Misfire (Possible three way catalyst damage)
One trip detection diagnoses
Mode II Ignition switch in
ON position
Engine stoppedSELF-DIAGNOSTIC
RESULTSThis function allows DTCs and 1st trip DTCs to be read.
Engine running HEATED OXYGEN SENSOR 1
MONITORThis function allows the fuel mixture condition (lean or rich),
monitored by heated oxygen sensor 1, to be read.
MI Condition
ON When the malfunction is detected.
OFF No malfunction.
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-101
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
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nates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are dis-
played, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These unidentified
codes can be identified by using the CONSULT-III or GST. A DTC will be used as an example for how to read
a code.
A particular trouble code can be identified by the number of four-digit numeral flashes as follows.
The length of time the 1,000th-digit numeral flashes on and off is 1.2 seconds consisting of an ON (0.6-sec-
ond) - OFF (0.6-second) cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-second OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no mal-
function. (See EC-361, "
DTCIndex")
Diagnostic Test Mode II — Heated oxygen sensor 1 monitor
In this mode, the MI displays the condition of the fuel mixture (lean or rich) which is monitored by the heated
oxygen sensor 1.
*: Maintains conditions just before switching to open loop.
To check the heated oxygen sensor 1 function, start engine in the Diagnostic Test Mode II and warm it up until
engine coolant temperature indicator points to the middle of the gauge.
Nest run engine at about 2,000 rpm for about 2 minutes under no load conditions. Then make sure that the MI
comes ON more than 5 times within 1 seconds with engine running at 2,000 rpm under no load.
Number 0 123456789 A B C D E F
Flashes 10 123456789 11 12 13 14 15 16
PBIB3005E
MI Fuel mixture condition in the exhaust gas Air fuel ratio feedback control condition
ON Lean
Closed loop system
OFF Rich
*Remains ON or OFF Any condition Open loop system
EC-102
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
How to Switch Diagnostic Test Mode
NOTE:
It is better to count the time accurately with a clock.
It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has
a malfunction.
Always ECM returns to Diagnostic Test Mode I after ignition switch is turned OFF.
HOW TO SET DIAGNOSTIC TEST MODE II (SELF-DIAGNOSTIC RESULTS)
1. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
2. Repeat the following procedure quickly five times within 5 seconds.
- Fully depress the accelerator pedal.
- Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the MI starts
blinking.
NOTE:
Do not release the accelerator pedal for 10 seconds if MI may start blinking on the halfway of this
10 seconds. This blinking is displaying SRT status and is continued for another 10 seconds.
4. Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).
NOTE:
Wait until the same DTC (or 1st trip DTC) appears to confirm all DTCs certainly.
HOW TO SET DIAGNOSTIC TEST MODE II (HEATE OXYGEN SENSOR 1 MONITOR)
1. Set ECM in Diagnostic Test Mode II (Self-diagnostic results).
Refer to “How to Set Diagnostic Test Mode II (Self-diagnostic Results)”.
2. Start Engine.
ECM has entered to Diagnostic Test Mode II (Heated oxygen sensor 1 monitor).
HOW TO ERASE DIAGNOSTIC TEST MODE II (SELF-DIAGNOSTIC RESULTS)
1. Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to “How to Set Diagnostic Test Mode II
(Self-diagnostic Results)”.
2. Fully depress the accelerator pedal and keep it for more than 10 seconds.
The emission-related diagnostic information has been erased from the backup memory in the ECM.
3. Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.
How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to “How
to Erase Diagnostic Test Mode II (Self-diagnostic Results)”.
If the battery is disconnected, the DTC will be lost from the backup memory within 24 hours.
Be careful not to erase the stored memory before starting trouble diagnoses.
OBD System Operation Chart
Relationship Between MI, 1st Trip DTC, DTC and Detectable Items
When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are
stored in the ECM memory.
When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
stored in the ECM memory, and the MI will come on.
The MI will go off after the vehicle is driven 3 times (pattern B) with no malfunction. The drive is counted only
when the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs while count-
ing, the counter will reset.
The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (pattern A) without the
same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and Fuel Injection
System, the DTC and freeze frame data will be stored until the vehicle is driven 80 times (pattern C) without
PBIB0092E
EC-108
< FUNCTION DIAGNOSIS >[HR16DE (WITH EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-III screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to EC-94, "
Diagnosis Description". ItemDIAGNOSTIC TEST MODE
WORK
SUPPORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORACTIVE
TESTDTC & SRT
CONFIRMATION
DTC*1FREEZE
FRAME
DATA*2SRT STA-
TUSDTC
WORK
SUP-
PORT
ENGINE CONTROL COMPONENT PARTS
INPUT
Crankshaft position sensor (POS)×××
Camshaft position sensor (PHASE)×××
Mass air flow sensor××
Engine coolant temperature sensor××××
Heated oxygen sensor 1××××
Heated oxygen sensor 2××××
Vehicle speed sensor×××
Accelerator pedal position sensor××
Throttle position sensor×××
Intake air temperature sensor×××
Knock sensor×
Refrigerant pressure sensor×
Closed throttle position switch (accel-
erator pedal position sensor signal)×
Air conditioner switch×
Park/neutral position (PNP) switch××
Stop lamp switch××
EPS control unit×
Battery voltage×
Load signal×
ASCD steering switch××
ASCD brake switch××
ASCD clutch switch××
ENGINE COTNROL COMPONENT PARTS
OUTPUT
Fuel injector××
Power transistor (Ignition timing)××
Throttle control motor relay××
Throttle control motor×
EVAP canister purge volume control
solenoid valve××××
Air conditioner relay×
Fuel pump relay×××
Cooling fan relay×××
Heated oxygen sensor 1 heater×××
Heated oxygen sensor 2 heater×××
Intake valve timing control solenoid
valve×××
Calculated load value××
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.