INFINITI FX35 2008 Service Manual

POSITIVE CRANKCASE VENTILATIONEC-51
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POSITIVE CRANKCASE VENTILATION
DescriptionINFOID:0000000001325911
SYSTEM DESCRIPTION
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is prov
ided to conduct crankcase blow-by gas to the intake
manifold. During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the
PCV valve. Normally, the capacity of the valve is su fficient to handle any blow-by and a small amount of venti-
lating air. The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air
passes through the hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold
vacuum is insufficient to draw the blow-by flow through the valve. The flow goes through the hose connection
in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meetthe requirement. This is because some of the flow will go
through the hoseconnection to the air inlet tubes under all condi-
tions.
Component InspectionINFOID:0000000001325912
PCV (POSITIVE CRANKCASE VENTILATION) VALVE
With engine running at idle, remove PCV valve from rocker cover. A
properly working valve makes a hissing noise as air passes through
it. A strong vacuum should be felt immediately when a finger is
placed over valve inlet.
SEC921C
PBIB1588E
PBIB1589E
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EC-52
< SERVICE INFORMATION >[VQ35DE]
POSITIVE CRANKCASE VENTILATION
PCV VALVE VENTILATION HOSE
1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any
hosecannot be freed of obstructions, replace.
S-ET277
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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
EC-53
< SERVICE INFORMATION > [VQ35DE]
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IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
DescriptionINFOID:0000000001325913

If the security indicator lights up with the ignition switch in the ON position or “NATS MALFUNC-
TION” is displayed on “SELF-DIAG RESULTS” screen, perform self-diagnostic results mode with
CONSULT-III using NATS program card. Refer to BL-185
.
 Confirm no self-diagnostic results of IVIS (NATS) is displayed before touching “ERASE” in “SELF-
DIAG RESULTS” mode with CONSULT-III.
 When replacing ECM, initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition
key IDs must be carried out with CO NSULT-III using NATS program card.
Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of IVIS (NATS)
initialization and all IVIS (NATS) ignition key ID registration, refe r to CONSULT-III Operation Manual,
IVIS/NVIS.
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EC-54
< SERVICE INFORMATION >[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
ON BOARD DIAGNO
STIC (OBD) SYSTEM
IntroductionINFOID:0000000001325914
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 usi ng 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 (MIL) 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-95,
"Fail-Safe Chart".)
Two Trip Detection LogicINFOID:0000000001325915
When a malfunction is detected for the 1st time, 1st trip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MIL 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 MIL lights up. The MIL lights up at the same time when the DTC is stored. <2nd
trip> The “trip” in the “Two Trip Detection Logic” m eans a driving mode in which self-diagnosis is performed
during vehicle operation. Specific on board diagnostic item s will cause the ECM to light up or blink the MIL,
and store DTC and Freeze Frame data, even in the 1st trip, as shown below.
× : Applicable —: Not applicable
When there is an open circuit on MIL circuit, the ECM c annot warn the driver by lighting up MIL when there is
malfunction on engine control system.
Emission-related diagnostic information Diagnostic service
Diagnostic Trouble Code (DTC) Service $03 of SAE J1979
Freeze Frame data Service $02 of SAE J1979
System Readiness Test (SRT) code Service $01 of SAE J1979
1st Trip Diagnostic Trouble Code (1st Trip DTC) Service $07 of SAE J1979
1st Trip Freeze Frame data
Test values and Test limits Service $06 of SAE J1979
Calibration ID Service $09 of SAE J1979
DTC 1st trip DTC Freeze
Frame data 1st trip Freeze
Frame data SRT code SRT status Test value
CONSULT-III ×× × × × × —
GST ×× × —×××
ECM ××*— — — ×—
Items MIL DTC 1st trip DTC
1st trip 2nd trip 1st trip
displaying 2nd trip
displaying 1st trip
displaying 2nd trip
display- ing
Blinking Lighting
up Blinking Lighting
up
Misfire (Possible three way catalyst
damage) — DTC: P0300 - P0306 is
being detected ×
———— — ×—
Misfire (Possible three way catalyst
damage) — DTC: P0300 - P0306 is
being detected ——
×—— ×——
One trip detection diagnoses (Re-
fer to EC-55, "
Emission-Related Di-
agnostic Information".) —
×—— ×———
Except above — — — ×— ×× —
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ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-55
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Therefore, when electrical controlled throttle and part
of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine c ontrol system malfunctions and MIL circuit is open by means
of operating fail-safe function.
The fail-safe function also operates when above diagnos es except MIL circuit are detected and demands the
driver to repair the malfunction.
Emission-Related Diagnostic InformationINFOID:0000000001325916
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
× : Applicable —: Not applicable
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut
Items
(CONSULT-III screen terms) DTC*
1
SRT code Trip MIL
Reference
page
CONSULT-III
GST*
2ECM*3
CAN COMM CIRCUIT U1000 1000*5—1×EC-146
CAN COMM CIRCUIT U1001
1001*5—2
(Models with ASCD) —EC-1461 or 2
(Models with
ICC)
CONTROL UNIT(CAN) U1010 1010 — 1 ×EC-148
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. P0000 0000
——
Flashing*8—
INT/V TIM CONT-B1 P0011 0011 — 2 ×EC-149
INT/V TIM CONT-B2 P0021 0021 — 2 ×EC-149
A/F SEN1 HTR (B1) P0031 0031 — 2 ×EC-153
A/F SEN1 HTR (B1) P0032 0032 — 2 ×EC-153
HO2S2 HTR (B1) P0037 0037 — 2 ×EC-160
HO2S2 HTR (B1) P0038 0038 — 2 ×EC-160
A/F SEN1 HTR (B2) P0051 0051 — 2 ×EC-153
A/F SEN1 HTR (B2) P0052 0052 — 2 ×EC-153
HO2S2 HTR (B2) P0057 0057 — 2 ×EC-160
HO2S2 HTR (B2) P0058 0058 — 2 ×EC-160
INT/V TIM V/CIR-B1 P0075 0075 — 2 ×EC-168
INT/V TIM V/CIR-B2 P0081 0081 — 2 ×EC-168
MAF SEN/CIRCUIT-B1 P0101 0101 — 2 ×EC-175
MAF SEN/CIRCUIT-B1 P0102 0102 — 1 ×EC-182
MAF SEN/CIRCUIT-B1 P0103 0103 — 1 ×EC-182
IAT SEN/CIRCUIT-B1 P0112 0112 — 2 ×EC-189
IAT SEN/CIRCUIT-B1 P0113 0113 — 2 ×EC-189
ECT SEN/CIRC P0117 0117 — 1 ×EC-193
ECT SEN/CIRC P0118 0118 — 1 ×EC-193
TP SEN 2/CIRC-B1 P0122 0122 — 1 ×EC-198
TP SEN 2/CIRC-B1 P0123 0123 — 1 ×EC-198
ECT SENSOR P0125 0125 — 2 ×EC-204
IAT SENSOR-B1 P0127 0127 — 2 ×EC-207
THERMSTAT FNCTN P0128 0128 — 2 ×EC-210
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EC-56
< SERVICE INFORMATION >[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
A/F SENSOR1 (B1) P0130 0130 — 2
×EC-212
A/F SENSOR1 (B1) P0131 0131 — 2 ×EC-220
A/F SENSOR1 (B1) P0132 0132 — 2 ×EC-228
A/F SENSOR1 (B1) P0133 0133 ×2 ×EC-236
HO2S2 (B1) P0137 0137 ×2 ×EC-245
HO2S2 (B1) P0138 0138 ×2 ×EC-254
HO2S2 (B1) P0139 0139 ×2 ×EC-265
A/F SENSOR1 (B2) P0150 0150 — 2 ×EC-212
A/F SENSOR1 (B2) P0151 0151 — 2 ×EC-220
A/F SENSOR1 (B2) P0152 0152 — 2 ×EC-228
A/F SENSOR1 (B2) P0153 0153 ×2 ×EC-236
HO2S2 (B2) P0157 0157 ×2 ×EC-245
HO2S2 (B2) P0158 0158 ×2 ×EC-254
HO2S2 (B2) P0159 0159 ×2 ×EC-265
FUEL SYS-LEAN-B1 P0171 0171 — 2 ×EC-274
FUEL SYS-RICH-B1 P0172 0172 — 2 ×EC-284
FUEL SYS-LEAN-B2 P0174 0174 — 2 ×EC-274
FUEL SYS-RICH-B2 P0175 0175 — 2 ×EC-284
FTT SENSOR P0181 0181 — 2 ×EC-294
FTT SEN/CIRCUIT P0182 0182 — 2 ×EC-298
FTT SEN/CIRCUIT P0183 0183 — 2 ×EC-298
TP SEN 1/CIRC-B1 P0222 0222 — 1 ×EC-302
TP SEN 1/CIRC-B1 P0223 0223 — 1 ×EC-302
MULTI CYL MISFIRE P0300 0300 — 2 ×EC-308
CYL 1 MISFIRE P0301 0301 — 2 ×EC-308
CYL 2 MISFIRE P0302 0302 — 2 ×EC-308
CYL 3 MISFIRE P0303 0303 — 2 ×EC-308
CYL 4 MISFIRE P0304 0304 — 2 ×EC-308
CYL 5 MISFIRE P0305 0305 — 2 ×EC-308
CYL 6 MISFIRE P0306 0306 — 2 ×EC-308
KNOCK SEN/CIRC-B1 P0327 0327 — 2 — EC-315
KNOCK SEN/CIRC-B1 P0328 0328 — 2 —EC-315
CKP SEN/CIRCUIT P0335 0335 — 2×EC-319
CMP SEN/CIRC-B1 P0340 0340 — 2 ×EC-324
CMP SEN/CIRC-B2 P0345 0345 — 2 ×EC-324
TW CATALYST SYS-B1 P0420 0420 ×2 ×EC-332
TW CATALYST SYS-B2 P0430 0430 ×2 ×EC-332
EVAP PURG FLOW/MON P0441 0441 ×2 ×EC-336
EVAP SMALL LEAK P0442 0442 ×2 ×EC-341
PURG VOLUME CONT/V P0443 0443 — 2 ×EC-348
PURG VOLUME CONT/V P0444 0444 — 2 ×EC-355
PURG VOLUME CONT/V P0445 0445 — 2 ×EC-355
Items
(CONSULT-III screen terms) DTC*
1
SRT code Trip MIL
Reference
page
CONSULT-III
GST*
2ECM*3
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ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-57
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OVENT CONTROL VALVE P0447 0447 — 2
×EC-361
VENT CONTROL VALVE P0448 0448 — 2 ×EC-366
EVAP SYS PRES SEN P0451 0451 — 2 ×EC-372
EVAP SYS PRES SEN P0452 0452 — 2 ×EC-375
EVAP SYS PRES SEN P0453 0453 — 2 ×EC-381
EVAP GROSS LEAK P0455 0455 — 2 ×EC-388
EVAP VERY SML LEAK P0456 0456
×*42 ×EC-394
FUEL LEV SEN SLOSH P0460 0460 — 2 ×EC-401
FUEL LEVEL SENSOR P0461 0461 — 2 ×EC-403
FUEL LEVL SEN/CIRC P0462 0462 — 2 ×EC-405
FUEL LEVL SEN/CIRC P0463 0463 — 2 ×EC-405
VEH SPEED SEN/CIRC*6P0500 0500 — 2 ×EC-407
ISC SYSTEM P0506 0506 — 2 ×EC-409
ISC SYSTEM P0507 0507 — 2 ×EC-411
PW ST P SEN/CIRC P0550 0550 — 2 — EC-413
ECM BACK UP/CIRCUIT P0603 0603 — 2×EC-418
ECM P0605 0605 — 1 or 2 × or — EC-422
SENSOR POWER/CIRC P0643 0643 — 1 ×EC-424
TCM P0700 0700 — 1 ×AT- 1 0 1
PNP SW/CIRC P0705 0705 — 2 ×AT- 1 0 2
ATF TEMP SEN/CIRC P0710 0710 — 2 ×AT- 1 3 2
TURBINE SENSOR P0717 0717 — 2 ×AT- 1 0 6
VEH SPD SEN/CIR AT*6P0720 0720 — 2 ×AT- 1 0 8
A/T 1ST GR FNCTN P0731 0731 — 2 ×AT- 11 4
A/T 2ND GR FNCTN P0732 0732 — 2 ×AT- 11 6
A/T 3RD GR FNCTN P0733 0733 — 2 ×AT- 11 8
A/T 4TH GR FNCTN P0734 0734 — 2 ×AT- 1 2 0
A/T 5TH GR FNCTN P0735 0735 — 2 ×AT- 1 2 2
TCC SOLENOID/CIRC P0740 0740 — 2 ×AT- 1 2 4
A/T TCC S/V FNCTN P0744 0744 — 2 ×AT- 1 2 6
L/PRESS SOL/CIRC P0745 0745 — 2 ×AT- 1 2 8
P-N POS SW/CIRCUIT P0850 0850 — 2 ×EC-429
CLOSED LOOP-B1 P1148 1148 — 1 ×EC-434
CLOSED LOOP-B2 P1168 1168 — 1 ×EC-434
TCS C/U FUNCTN P1211 1211 — 2 — EC-435
TCS/CIRC P1212 1212 — 2 —EC-436
ENG OVER TEMP P1217 1217 — 1×EC-437
CTP LEARNING-B1 P1225 1225 — 2 — EC-447
CTP LEARNING-B1 P1226 1226 — 2 —EC-449
COLD START CONTROL P1421 1421 — 2×EC-451
Items
(CONSULT-III screen terms) DTC*
1
SRT code Trip MIL
Reference
page
CONSULT-III
GST*
2ECM*3
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EC-58
< SERVICE INFORMATION >[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
*1: 1st trip DTC No. is
the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
*4: SRT code will not be set if the self-diagnostic result is NG. ASCD SW P1564 1564 — 1 —
EC-453
(Mod-
els with ICC)
EC-459
(Mod-
els with AS- CD)
ICC COMMAND VALUE*
7P1568 1568 — 1 — EC-464
ASCD BRAKE SW P1572 1572 — 1 — EC-465
(Mod-
els with ICC)
EC-474
(Mod-
els with AS- CD)
ASCD VHL SPD SEN P1574 1574 — 1 — EC-481
(Mod-
els with ICC)
EC-483
(Mod-
els with AS- CD)
LOCK MODE P1610 1610 — 2 — BL-4
ID DISCARD IMM-ECM P1611 1611 — 2 —BL-4
CHAIN OF ECM-IMMU P1612 1612 — 2 —BL-4
CHAIN OF IMMU-KEY P1614 1614 — 2 —BL-4
DIFFERENCE OF KEY P1615 1615 — 2 —BL-4
IN PULLY SPEED P1715 1715 — 2 —EC-485
A/T INTERLOCK P1730 1730 — 1×AT- 1 3 9
I/C SOLENOID/CIRC P1752 1752 — 1 ×AT- 1 4 3
FR/B SOLENOID/CIRC P1757 1757 — 1 ×AT- 1 4 5
D/C SOLENOID/CIRC P1762 1762 — 1 ×AT- 1 4 7
HLR/C SOL/CIRC P1767 1767 — 1 ×AT- 1 4 9
LC/B SOLENOID/CIRC P1772 1772 — 1 ×AT- 1 5 1
LC/B SOLENOID FNCT P1774 1774 — 1 ×AT- 1 5 3
BRAKE SW/CIRCUIT P1805 1805 — 2 — EC-486
ETC MOT PWR-B1 P2100 2100 — 1×EC-490
ETC FNCTN/CIRC-B1 P2101 2101 — 1 ×EC-494
ETC MOT PWR P2103 2103 — 1 ×EC-490
ETC MOT-B1 P2118 2118 — 1 ×EC-500
ETC ACTR-B1 P2119 2119 — 1 ×EC-504
APP SEN 1/CIRC P2122 2122 — 1 ×EC-506
APP SEN 1/CIRC P2123 2123 — 1 ×EC-506
APP SEN 2/CIRC P2127 2127 — 1 ×EC-512
APP SEN 2/CIRC P2128 2128 — 1 ×EC-512
TP SENSOR-B1 P2135 2135 — 1 ×EC-518
APP SENSOR P2138 2138 — 1 ×EC-524
A/F SENSOR1 (B1) P2A00 2A00 — 2 ×EC-532
A/F SENSOR1 (B2) P2A03 2A03 — 2 ×EC-532
Items
(CONSULT-III screen terms) DTC*
1
SRT code Trip MIL
Reference
page
CONSULT-III
GST*
2ECM*3
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ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-59
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*5: The trouble shooting for this DTC needs CONSULT-III.
*6: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates.
*7: For models with ICC system.
*8: When the ECM is in the mode of displaying SRT status, MIL ma
y flash. For the details, refer to “How to Display SRT Status”.
DTC AND 1ST TRIP DTC
The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnostic
result obtained. If the ECM memory was cleared previous ly, and the 1st trip DTC did not reoccur, the 1st trip
DTC will not be displayed.
If a malfunction is detected during the 1st trip, the 1st trip DTC is stored in the ECM memory. The MIL will not
light up (two trip detection logic). If the same malfunc tion is not detected in the 2nd trip (meeting the required
driving pattern), the 1st trip DTC is cleared from the ECM memory. If the same malfunction is detected in the
2nd trip, both the 1st trip DTC and DTC are stored in t he ECM memory and the MIL lights up. In other words,
the DTC is stored in the ECM memory and the MIL light s up when the same malfunction occurs in two consec-
utive trips. If a 1st trip DTC is stored and a non-diagnostic operation is performed between the 1st and 2nd
trips, only the 1st trip DTC will continue to be stored. Fo r malfunctions that blink or light up the MIL during the
1st trip, the DTC and 1st trip DTC are stored in the ECM memory.
Procedures for clearing the DTC and the 1st trip DT C from the ECM memory are described in “HOW TO
ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”.
For malfunctions in which 1st trip DTCs are displa yed, refer to “EMISSION-RELATED DIAGNOSTIC INFOR-
MATION ITEMS”. These items are required by legal r egulations to continuously monitor the system/compo-
nent. In addition, the items monitored non-cont inuously are also displayed on CONSULT-III.
1st trip DTC is specified in Service $07 of SAE J1979. 1st trip DTC detection occurs without lighting up the MIL
and therefore does not warn the driver of a malfunction. However, 1st trip DTC detection will not prevent the
vehicle from being tested, for example during Inspection/Maintenance (I/M) tests.
When a 1st trip DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame
data as specified in Work Flow procedure Step II, refer to EC-89, "
Trouble Diagnosis Introduction". Then per-
form DTC Confirmation Procedure or Overall Function Che ck to try to duplicate the malfunction. If the mal-
function is duplicated, the item requires repair.
How to Read DTC and 1st Trip DTC
DTC and 1st trip DTC can be read by the following methods.
With CONSULT-III
With GST
CONSULT-III or GST (Generic Scan Tool ) Examples: P0340, P0850, P1148, etc.
These DTCs are prescribed by SAE J2012.
(CONSULT-III also displays the malfunctioning component or system.)
No Tools
The number of blinks of the MIL in the Diagnostic Test Mode II (Self-Diagnostic Results) indicates the DTC.
Example: 0340, 0850, 1148, etc.
These DTCs are controlled by NISSAN.
 1st trip DTC No. is the same as DTC No.
 Output of a DTC indicates a malfunc tion. However, GST or the Diagnostic Test Mode II do not indi-
cate whether the malfunction is stil l occurring or has occurred in the past and has returned to nor-
mal. CONSULT-III can identify malfunction status as shown below. Therefore, using CONSULT-III (if
available) is recommended.
DTC or 1st trip DTC of a malfunction is display ed in SELF-DIAGNOSTIC RESULTS mode of CONSULT-III.
Time data indicates how many times the vehicle was driven after the last detection of a DTC.
If the DTC is being detected currently, the time data will be [0].
If a 1st trip DTC is stored in the ECM, the time data will be [1t].
FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA
The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant tem-
perature, short term fuel trim, long term fuel trim, engi ne speed, vehicle speed, absolute throttle position, base
fuel schedule and intake air temperature at the moment a malfunction is detected.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
The data, stored together with the DTC data, are ca lled freeze frame data and displayed on CONSULT-III or
GST. The 1st trip freeze frame data can only be displa yed on the CONSULT-III screen, not on the GST. For
details, see EC-117, "
CONSULT-III Function (ENGINE)".
Only one set of freeze frame data (either 1st trip freez e frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM me mory along with the 1st trip DTC. There is no priority
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EC-60
< SERVICE INFORMATION >[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
for 1st trip freeze frame data and it is updated each time
a different 1st trip DTC is detected. However, once
freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data.
For example, the EGR malfunction (Priority: 2) was detected and the freeze frame data was stored in the 2nd
trip. After that when the misfire (Priority: 1) is detected in another trip, the freeze frame data will be updated
from the EGR malfunction to the misfire. The 1st trip freeze frame data is updated each time a different mal-
function is detected. There is no priority for 1st trip freeze frame data. However, once freeze frame data is
stored in the ECM memory, 1st trip freeze data is no longer stored (because only one freeze frame data or 1st
trip freeze frame data can be stored in the ECM). If fr eeze frame data is stored in the ECM memory and freeze
frame data with the same priority occurs later, t he first (original) freeze frame data remains unchanged in the
ECM memory.
Both 1st trip freeze frame data and freeze frame dat a (along with the DTCs) are cleared when the ECM mem-
ory is erased. Procedures for clearing the ECM me mory are described in “HOW TO ERASE EMISSION-
RELATED DIAGNOSTIC INFORMATION”.
SYSTEM READINESS TEST (SRT) CODE
System Readiness Test (SRT) code is specified in Service $01 of SAE J1979.
As part of an enhanced emissions test for Inspection & Ma intenance (I/M), certain states require the status of
SRT be used to indicate whether the ECM has completed self-diagnosis of major emission s\
ystems and com-
ponents. Completion must be verified in order for the emissions inspection to proceed.
If a vehicle is rejected for a State emissions inspec tion due to one or more SRT items indicating “INCMP”, use
the information in this Service Manual to set the SRT to “CMPLT”.
In most cases the ECM will automatically complete its self-diagnosis cycle during normal usage, and the SRT
status will indicate “CMPLT” for each application system . Once set as “CMPLT”, the SRT status remains
“CMPLT” until the self-diagnosis memory is erased.
Occasionally, certain portions of the self-diagnostic test may not be completed as a result of the customer's
normal driving pattern; the SRT will indicate “INCMP” for these items.
NOTE:
The SRT will also indicate “INCMP” if the self-diagnosis memory is erased for any reason or if the ECM mem-
ory power supply is interrupted for several hours.
If, during the state emissions inspection, the SRT indica tes “CMPLT” for all test items, the inspector will con-
tinue with the emissions test. However, if the SRT indi cates “INCMP” for one or more of the SRT items the
vehicle is returned to the customer untested.
NOTE:
If MIL 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. T herefore, 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”.
Priority Items
1 Freeze frame data Misfire — DTC: P0300 - P0306
Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175
2 Except the above items (Includes A/T related items)
3 1st trip freeze frame data
SRT item
(CONSULT-III indica- tion) Perfor-
mance Pri- ority* Required self-diagnostic items to set the SRT to “CMPLT” Corresponding DTC No.
CATALYST 2 Three way catalyst function P0420, P0430
EVAP SYSTEM 1 EVAP control system P0442
2 EVAP control system P0456
2 EVAP control system purge flow monitoring P0441
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C