control INFINITI M35 2007 Factory Service Manual

EC-54
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2007 April2007 M35/M45
ON BOARD DIAGNOSTIC (OBD) SYSTEMPFP:00028
IntroductionNBS004SL
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 (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-98,
"Fail-Safe Chart" .)
Two Trip Detection LogicNBS004SM
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 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” 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 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 cannot 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 DTCFreeze
Frame data1st trip Freeze
Frame dataSRT code SRT status Test value
CONSULT-II×× × × × ×—
GST×× ×—×××
ECM××*— — —×—
ItemsMIL 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 cata-
lyst damage) — DTC: P0300 -
P0306 is being detected×———— —×—
Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0306 is being detected——×——×——
One trip detection diagnoses
(Refer to EC-55, "
EMISSION-
RELATED DIAGNOSTIC INFOR-
MATION ITEMS" .)—×——×———
Except above — — —×—××—

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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Revision: 2007 April2007 M35/M45
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 control system malfunctions and MIL circuit is open by means
of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the
driver to repair the malfunction.
Emission-Related Diagnostic InformationNBS004SN
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-II screen terms)DTC*
1
SRT codeTest value/
Test limit
(GST only)Trip MIL Reference page
CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000
1000*4—— 1×EC-161
CAN COMM CIRCUIT U1001
1001*4——2 (Models with
ASCD)
—EC-1611 or 2 (Models
with ICC)
CONTROL UNIT(CAN) U1010 1010 — — 1×EC-164
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000—— —Flas
hing
*
8—
INT/V TIM CONT-B1 P0011 0011 — — 2×EC-166
INT/V TIM CONT-B2 P0021 0021 — — 2×EC-166
A/F SEN1 HTR (B1) P0031 0031 —×2×EC-170
A/F SEN1 HTR (B1) P0032 0032 —×2×EC-170
HO2S2 HTR (B1) P0037 0037 —×2×EC-177
HO2S2 HTR (B1) P0038 0038 —×2×EC-177
A/F SEN1 HTR (B2) P0051 0051 —×2×EC-170
A/F SEN1 HTR (B2) P0052 0052 —×2×EC-170
HO2S2 HTR (B2) P0057 0057 —×2×EC-177
HO2S2 HTR (B2) P0058 0058 —×2×EC-177
INT/V TIM V/CIR-B1 P0075 0075 — — 2×EC-185
INT/V TIM V/CIR-B2 P0081 0081 — — 2×EC-185
MAF SEN/CIRCUIT P0101 0101 — — 2×EC-193
MAF SEN/CIRCUIT P0102 0102 — — 1×EC-202
MAF SEN/CIRCUIT P0103 0103 — — 1×EC-202
IAT SEN/CIRCUIT P0112 0112 — — 2×EC-209
IAT SEN/CIRCUIT P0113 0113 — — 2×EC-209
ECT SEN/CIRC P0117 0117 — — 1×EC-214
ECT SEN/CIRC P0118 0118 — — 1×EC-214
TP SEN 2/CIRC P0122 0122 — — 1×EC-219
TP SEN 2/CIRC P0123 0123 — — 1×EC-219
ECT SENSOR P0125 0125 — — 2×EC-226
IAT SENSOR P0127 0127 — — 2×EC-229
THERMSTAT FNCTN P0128 0128 — — 2×EC-232
A/F SENSOR1 (B1) P0130 0130 —×2×EC-234
A/F SENSOR1 (B1) P0131 0131 —×2×EC-244
A/F SENSOR1 (B1) P0132 0132 —×2×EC-253

EC-56
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2007 April2007 M35/M45
A/F SENSOR1 (B1) P0133 0133××2×EC-262
HO2S2 (B1) P0137 0137××2×EC-274
HO2S2 (B1) P0138 0138××2×EC-285
HO2S2 (B1) P0139 0139××2×EC-298
A/F SENSOR1 (B2) P0150 0150 —×2×EC-234
A/F SENSOR1 (B2) P0151 0151 —×2×EC-244
A/F SENSOR1 (B2) P0152 0152 —×2×EC-253
A/F SENSOR1 (B2) P0153 0153××2×EC-262
HO2S2 (B2) P0157 0157××2×EC-274
HO2S2 (B2) P0158 0158××2×EC-285
HO2S2 (B2) P0159 0159××2×EC-298
FUEL SYS-LEAN-B1 P0171 0171 — — 2×EC-309
FUEL SYS-RICH-B1 P0172 0172 — — 2×EC-320
FUEL SYS-LEAN-B2 P0174 0174 — — 2×EC-309
FUEL SYS-RICH-B2 P0175 0175 — — 2×EC-320
FTT SENSOR P0181 0181 — — 2×EC-331
FTT SEN/CIRCUIT P0182 0182 — — 2×EC-337
FTT SEN/CIRCUIT P0183 0183 — — 2×EC-337
TP SEN 1/CIRC P0222 0222 — — 1×EC-342
TP SEN 1/CIRC P0223 0223 — — 1×EC-342
MULTI CYL MISFIRE P0300 0300 — — 2×EC-349
CYL 1 MISFIRE P0301 0301 — — 2×EC-349
CYL 2 MISFIRE P0302 0302 — — 2×EC-349
CYL 3 MISFIRE P0303 0303 — — 2×EC-349
CYL 4 MISFIRE P0304 0304 — — 2×EC-349
CYL 5 MISFIRE P0305 0305 — — 2×EC-349
CYL 6 MISFIRE P0306 0306 — — 2×EC-349
KNOCK SEN/CIRC-B1 P0327 0327 — — 2 —EC-359
KNOCK SEN/CIRC-B1 P0328 0328 — — 2 —EC-359
CKP SEN/CIRCUIT P0335 0335 — — 2×EC-364
CMP SEN/CIRC-B1 P0340 0340 — — 2×EC-371
CMP SEN/CIRC-B2 P0345 0345 — — 2×EC-371
TW CATALYST SYS-B1 P0420 0420××2×EC-380
TW CATALYST SYS-B2 P0430 0430××2×EC-380
EVAP PURG FLOW/MON P0441 0441××2×EC-386
EVAP SMALL LEAK P0442 0442××2×EC-391
PURG VOLUME CONT/V P0443 0443 — — 2×EC-400
PURG VOLUME CONT/V P0444 0444 — — 2×EC-408
PURG VOLUME CONT/V P0445 0445 — — 2×EC-408
VENT CONTROL VALVE P0447 0447 — — 2×EC-415
VENT CONTROL VALVE P0448 0448 — — 2×EC-422
EVAP SYS PRES SEN P0451 0451 — — 2×EC-428
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Te s t l i m i t
(GST only)Trip MIL Reference page
CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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Revision: 2007 April2007 M35/M45EVAP SYS PRES SEN P0452 0452 — — 2×EC-431
EVAP SYS PRES SEN P0453 0453 — — 2×EC-437
EVAP GROSS LEAK P0455 0455 — — 2×EC-445
EVAP VERY SML LEAK P0456 0456
×*7×2×EC-453
FUEL LEV SEN SLOSH P0460 0460 — — 2×EC-462
FUEL LEVEL SENSOR P0461 0461 — — 2×EC-464
FUEL LEVL SEN/CIRC P0462 0462 — — 2×EC-466
FUEL LEVL SEN/CIRC P0463 0463 — — 2×EC-466
VEH SPEED SEN/CIRC*5P0500 0500 — — 2×EC-468
ISC SYSTEM P0506 0506 — — 2×EC-470
ISC SYSTEM P0507 0507 — — 2×EC-472
PW ST P SEN/CIRC P0550 0550 — — 2 —EC-474
ECM BACK UP/CIRCUIT P0603 0603 — — 2×EC-479
ECM P0605 0605 — — 1 or 2× or
—EC-483
SENSOR POWER/CIRC P0643 0643 — — 1×EC-486
TCM P0700 0700 — — 1×AT- 11 2
PNP SW/CIRC P0705 0705 — — 2×AT- 11 3
ATF TEMP SEN/CIRC P0710 0710 — — 2×AT- 1 3 5
TURBINE SENSOR P0717 0717 — — 2×AT- 11 7
VEH SPD SEN/CIR AT*5P0720 0720 — — 2×AT- 11 9
ENGINE SPEED SIG P0725 0725 — — 2 —AT- 1 2 4
TCC SOLENOID/CIRC P0740 0740 — — 2×AT- 1 2 6
A/T TCC S/V FNCTN P0744 0744 — — 2×AT- 1 2 8
L/PRESS SOL/CIRC P0745 0745 — — 2×AT- 1 3 0
P-N POS SW/CIRCUIT P0850 0850 — — 2×EC-491
CLOSED LOOP-B1 P1148 1148 — — 1×EC-496
CLOSED LOOP-B2 P1168 1168 — — 1×EC-496
TCS C/U FUNCTN P1211 1211 — — 2 —EC-497
TCS/CIRC P1212 1212 — — 2 —EC-498
ENG OVER TEMP P1217 1217 — — 1×EC-499
FPCM/CIRCUIT P1220 1220 — — 2×EC-510
CTP LEARNING P1225 1225 — — 2 —EC-518
CTP LEARNING P1226 1226 — — 2 —EC-520
COLD START CONTROL P1421 1421 — — 2×EC-522
BAT CURRENT SENSOR P1550 1550 — — 2 —EC-524
BAT CURRENT SENSOR P1551 1551 — — 2 —EC-531
BAT CURRENT SENSOR P1552 1552 — — 2 —EC-531
BAT CURRENT SENSOR P1553 1553 — — 2 —EC-538
BAT CURRENT SENSOR P1554 1554 — — 2 —EC-545
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Test limit
(GST only)Trip MIL Reference page
CONSULT-II
GST*
2ECM*3

EC-58
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2007 April2007 M35/M45
*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: The troubleshooting for this DTC needs CONSULT-II.
*5: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates.ASCD SW P1564 1564 — — 1 — EC-552
(Models
with ICC)
EC-559
(Models
with ASCD)
ICC COMMAND VALUE*
6P1568 1568 — — 1 —EC-566
ASCD BRAKE SW P1572 1572 — — 1 — EC-567
(Models
with ICC)
EC-576
(Models
with ASCD)
ASCD VHL SPD SEN P1574 1574 — — 1 — EC-584
(Models
with ICC)
EC-586
(Models
with ASCD)
NATS MALFUNCTIONP1610 -
P16151610 - 1615 — — 2 —EC-53
TP SEN/CIRC A/T P1705 1705 — — 2 —AT-132
IN PULY SPEED P1715 1715 — — 2 —EC-588
A/T INTERLOCK P1730 1730 — — 1×AT-142
I/C SOLENOID/CIRC P1752 1752 — — 1×AT-147
I/C SOLENOID FNCTN P1754 1754 — — 1×AT-149
FR/B SOLENOID/CIRC P1757 1757 — — 1×AT-151
FR/B SOLENOID FNCT P1759 1759 — — 1×AT-153
D/C SOLENOID/CIRC P1762 1762 — — 1×AT-155
D/C SOLENOID FNCTN P1764 1764 — — 1×AT-157
HLR/C SOL/CIRC P1767 1767 — — 1×AT-159
HLR/C SOL FNCTN P1769 1769 — — 1×AT-161
LC/B SOLENOID/CIRC P1772 1772 — — 1×AT-163
LC/B SOLENOID FNCT P1774 1774 — — 1×AT-165
BRAKE SW/CIRCUIT P1805 1805 — — 2 —EC-589
ETC MOT PWR P2100 2100 — — 1×EC-598
ETC FUNCTION/CIRC P2101 2101 — — 1×EC-604
ETC MOT PWR P2103 2103 — — 1×EC-598
ETC MOT P2118 2118 — — 1×EC-610
ETC ACTR P2119 2119 — — 1×EC-615
APP SEN 1/CIRC P2122 2122 — — 1×EC-617
APP SEN 1/CIRC P2123 2123 — — 1×EC-617
APP SEN 2/CIRC P2127 2127 — — 1×EC-624
APP SEN 2/CIRC P2128 2128 — — 1×EC-624
TP SENSOR P2135 2135 — — 1×EC-631
APP SENSOR P2138 2138 — — 1×EC-638
A/F SENSOR1 (B1) P2A00 2A00 —×2×EC-646
A/F SENSOR1 (B2) P2A03 2A03 —×2×EC-646
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Te s t l i m i t
(GST only)Trip MIL Reference page
CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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*6: Models with ICC.
*7: SRT code will not be set if the self-diagnostic result is NG.
*8: When the ECM is in the mode of displaying SRT status, MIL may flash. For the details, refer to EC-63, "
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 previously, 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 malfunction 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 the ECM memory and the MIL lights up. In other words,
the DTC is stored in the ECM memory and the MIL lights 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. For 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 DTC from the ECM memory are described in EC-68, "
HOW
TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION" .
For malfunctions in which 1st trip DTCs are displayed, refer to EC-55, "
EMISSION-RELATED DIAGNOSTIC
INFORMATION ITEMS" . These items are required by legal regulations to continuously monitor the system/
component. In addition, the items monitored non-continuously are also displayed on CONSULT-II.
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 2, refer to EC-91, "
WORK FLOW" . Then perform DTC Confir-
mation Procedure or Overall Function Check to try to duplicate the malfunction. If the malfunction is dupli-
cated, 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-II
With GST
CONSULT-II or GST (Generic Scan Tool) Examples: P0340, P0850, P1148, etc.
These DTCs are prescribed by SAE J2012.
(CONSULT-II 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 malfunction. However, GST or the Diagnostic Test Mode II do not indi-
cate whether the malfunction is still occurring or has occurred in the past and has returned to nor-
mal. CONSULT-II can identify malfunction status as shown below. Therefore, using CONSULT-II (if
available) is recommended.
A sample of CONSULT-II display for DTC and 1st trip DTC is shown below. DTC or 1st trip DTC of a malfunc-
tion is displayed in SELF-DIAGNOSTIC RESULTS mode of CONSULT-II. 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].

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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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 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. 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-II.
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-II indication)Performance
Priority*Required self-diagnostic items to set the SRT to “CMPLT”Corresponding
DTC No.
CATALYST 2 Three way catalyst function P0420, P0430
EVAP SYSTEM 2 EVAP control system purge flow monitoring P0441
1 EVAP control system P0442
2 EVAP control system P0456
HO2S 2 Air fuel ratio (A/F) sensor 1 P0133, P0153
Heated oxygen sensor 2 P0137, P0157
Heated oxygen sensor 2 P0138, P0158
Heated oxygen sensor 2 P0139, P0159
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
(= MIL ON)
SRT of EGR “INCMP” “INCMP” “INCMP” “CMPLT”

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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TEST VALUE AND TEST LIMIT (GST ONLY — NOT APPLICABLE TO CONSULT-II)
The following is the information specified in Service $06 of SAE J1979.
The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while
being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the
maximum or minimum value and is compared with the test value being monitored.
These data (test value and test limit) are specified by Test ID (TID) and Component ID (CID) and can be dis-
played on the GST screen.
Item Self-diagnostic test item DTCTest value (GST display)
Test limit Conversion
TID CID
CATALYSTThree way catalyst function (Bank 1)P0420 01H 01H Max. 1/128
P0420 02H 81H Min. 1
Three way catalyst function (Bank 2)P0430 03H 02H Max. 1/128
P0430 04H 82H Min. 1
EVAP
SYSTEMEVAP control system (Small leak) P0442 05H 03H Max.
1/128 mm
2
EVAP control system purge flow monitoring P0441 06H 83H Min. 20 mV
EVAP control system (Very small leak) P0456 07H 03H Max.
1/128 mm
2
HO2SAir fuel ratio (A/F) sensor 1 (Bank 1)P0131 41H 8EH Min. 5mV
P0132 42H 0EH Max. 5mV
P2A00 43H 0EH Max. 0.002
P2A00 44H 8EH Min. 0.002
P0133 45H 8EH Min. 0.002
P0130 46H 0EH Max. 5mV
P0130 47H 8EH Min. 5mV
P0133 48H 8EH Min. 0.002
Air fuel ratio (A/F) sensor 1 (Bank 2)P0151 4CH 8FH Min. 5mV
P0152 4DH 0FH Max. 5mV
P2A03 4EH 0FH Max. 0.002
P2A03 4FH 8FH Min. 0.002
P0153 50H 8FH Min. 0.002
P0150 51H 0FH Max. 5mV
P0150 52H 8FH Min. 5mV
P0153 53H 8FH Min. 0.002
Heated oxygen sensor 2 (Bank 1)P0139 19H 86H Min. 10mV/500 ms
P0137 1AH 86H Min. 10 mV
P0138 1BH 06H Max. 10 mV
P0138 1CH 06H Max. 10mV
Heated oxygen sensor 2 (Bank 2)P0159 21H 87H Min. 10 mV/500 ms
P0157 22H 87H Min. 10 mV
P0158 23H 07H Max. 10 mV
P0158 24H 07H Max. 10mV

EC-68
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2007 April2007 M35/M45
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION
How to Erase DTC
WITH CONSULT-II
The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II.
If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased individu-
ally from the ECM and TCM (Transmission control module).
NOTE:
If the DTC is not for A/T related items (see EC-16, "
INDEX FOR DTC" ), skip steps 2 through 4.
1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10
seconds and then turn it ON (engine stopped) again.
2. Turn CONSULT-II ON and touch “A/T”.
3. Touch “SELF-DIAG RESULTS”.
4. Touch “ERASE”. [The DTC in the TCM (Transmission control module) will be erased.] Then touch “BACK”
twice.
5. Touch “ENGINE”.
6. Touch “SELF-DIAG RESULTS”.
7. Touch “ERASE”. (The DTC in the ECM will be erased.)
HO2S HTRA/F sensor 1 heater (Bank 1) P0032 57H 10H Max. 5 mV
P0031 58H 90H Min. 5 mV
A/F sensor 1 heater (Bank 2)P0052 59H 11H Max. 5 mV
P0051 5AH 91H Min. 5 mV
Heated oxygen sensor 2 heater (Bank 1)P0038 2DH 0AH Max. 20 mV
P0037 2EH 8AH Min. 20 mV
Heated oxygen sensor 2 heater (Bank 2)P0058 2FH 0BH Max. 20 mV
P0057 30H 8BH Min. 20 mV Item Self-diagnostic test item DTCTest value (GST display)
Test limit Conversion
TID CID

EC-70
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2007 April2007 M35/M45
–Test values
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all
of the data listed above, are cleared from the ECM memory during work procedures.
Malfunction Indicator Lamp (MIL)NBS004SO
DESCRIPTION
The MIL is located on the instrument panel.
1. The MIL will light up when the ignition switch is turned ON with-
out the engine running. This is a bulb check.
If the MIL does not light up, refer to DI-39, "
WARNING LAMPS"
or see EC-714, "MIL AND DATA LINK CONNECTOR" .
2. When the engine is started, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following three functions.
When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up MIL when there is
malfunction on engine control system.
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 control system malfunctions and MIL circuit is open by means
of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the
driver to repair the malfunction.
SEF217U
Diagnostic Test
ModeKEY and ENG.
Sta tusFunction Explanation of Function
Mode I Ignition switch in
ON position
Engine stoppedBULB CHECK This function checks the MIL bulb for damage (blown,
open circuit, etc.).
If the MIL does not come on, check MIL circuit.
Engine running MALFUNCTION
WARNINGThis is a usual driving condition. When a malfunction is
detected twice in two consecutive driving cycles (two trip
detection logic), the MIL will light up to inform the driver
that a malfunction has been detected.
The following malfunctions will light up or blink the MIL 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 operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut