sensor INFINITI FX35 2004 Service Manual

BASIC SERVICE PROCEDURE
EC-49
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2004 November 2004 FX35/FX45
35. ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC might be displayed.
Erase the stored memory in ECM and TCM. Refer to EC-67, "
HOW TO ERASE EMISSION-RELATED DIAG-
NOSTIC INFORMATION" and AT- 3 9 , "HOW TO ERASE DTC" .
>> GO TO 4.
36. CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization of IVIS (NATS) system and registration of IVIS (NATS) ignition key IDs. Refer to BL-
208, "ECM Re-communicating Function" .
>> GO TO 4.
Accelerator Pedal Released Position LearningABS006KE
DESCRIPTION
Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
harness connector of accelerator pedal position sensor or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF wait at least 10 seconds.
Throttle Valve Closed Position LearningABS006KF
DESCRIPTION
Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON.
3. Turn ignition switch OFF wait at least 10 seconds.
Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.
Idle Air Volume LearningABS006KG
DESCRIPTION
Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:

Each time electric throttle control actuator or ECM is replaced.

Idle speed or ignition timing is out of specification.
PREPARATION
Before performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.

Battery voltage: More than 12.9V (At idle)

Engine coolant temperature: 70 - 100°C (158 - 212°F)

PNP switch: ON

Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)

EC-50
[VQ35DE]
BASIC SERVICE PROCEDURE
Revision: 2004 November 2004 FX35/FX45
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine
is started the headlamp will not be illuminated.

Steering wheel: Neutral (Straight-ahead position)

Vehicle speed: Stopped

Transmission: Warmed-up
For models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “A/T”
system indicates less than 0.9V.
For models without CONSULT-II, drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT-II
1. Perform EC-49, "Accelerator Pedal Released Position Learning" .
2. Perform EC-49, "
Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
6. Touch “START” and wait 20 seconds.
7. Make sure that “CMPLT” is displayed on CONSULT-II screen. If
“CMPLT” is not displayed, Idle Air Volume Learning will not be
carried out successfully. In this case, find the cause of the inci-
dent by referring to the Diagnostic Procedure below.
8. Rev up the engine two or three times and make sure that idle
speed and ignition timing are within the specifications.
Without CONSULT-II
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.
1. Perform EC-49, "
Accelerator Pedal Released Position Learning" .
SEF217Z
SEF454Y
ITEM SPECIFICATION
Idle speed 650±50 rpm (in P or N position)
Ignition timing 15±5° BTDC (in P or N position)
MBIB0238E

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-53
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2004 November 2004 FX35/FX45
ON BOARD DIAGNOSTIC (OBD) SYSTEMPFP:00028
IntroductionABS006KI
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-82
.)
Two Trip Detection LogicABS006KJ
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 MIL up 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.
Emission-related diagnostic information SAE Mode
Diagnostic Trouble Code (DTC) Mode 3 of SAE J1979
Freeze Frame data Mode 2 of SAE J1979
System Readiness Test (SRT) code Mode 1 of SAE J1979
1st Trip Diagnostic Trouble Code (1st Trip DTC) Mode 7 of SAE J1979
1st Trip Freeze Frame data
Test values and Test limits Mode 6 of SAE J1979
Calibration ID Mode 9 of SAE J1979
DTC 1st trip DTCFreeze Frame
data1st trip Freeze
Frame dataSRT code 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-15
.)—×——×———
Except above — — —×—××—

EC-54
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2004 November 2004 FX35/FX45
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 InformationABS006KK
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
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/
Te s t l i m i t
(GST only)1st trip DTCReference
page CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000
1000*6———EC-142
CAN COMM CIRCUIT U1001
1001*6——×EC-142
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000————
INT/V TIM CONT-B1 P0011 0011 — —×EC-145
INT/V TIM CONT-B2 P0021 0021 — —×EC-145
HO2S1 HTR (B1) P0031 0031××
×*5EC-149
HO2S1 HTR (B1) P0032 0032××
×*5EC-149
HO2S2 HTR (B1) P0037 0037××
×*5EC-157
HO2S2 HTR (B1) P0038 0038××
×*5EC-157
HO2S1 HTR (B2) P0051 0051××
×*5EC-149
HO2S1 HTR (B2) P0052 0052××
×*5EC-149
HO2S2 HTR (B2) P0057 0057××
×*5EC-157
HO2S2 HTR (B2) P0058 0058××
×*5EC-157
MAF SEN/CIRCUIT P0101 0101 — — —EC-165
MAF SEN/CIRCUIT P0102 0102 — — —EC-173
MAF SEN/CIRCUIT P0103 0103 — — —EC-173
IAT SEN/CIRCUIT P0112 0112 — —×EC-180
IAT SEN/CIRCUIT P0113 0113 — —×EC-180
ECT SEN/CIRCUIT P0117 0117 — — —EC-185
ECT SEN/CIRCUIT P0118 0118 — — —EC-185
TP SEN 2/CIRC P0122 0122 — — —EC-190
TP SEN 2/CIRC P0123 0123 — — —EC-190
ECT SENSOR P0125 0125 — — —EC-197
IAT SENSOR P0127 0127 — —×EC-200
THERMSTAT FNCTN P0128 0128 — —×EC-203
HO2S1 (B1) P0132 0132 —××EC-205
HO2S1 (B1) P0133 0133××
×*5EC-214
HO2S1 (B1) P0134 0134 —××EC-226
HO2S2 (B1) P0138 0138 —××EC-236
HO2S2 (B1) P0139 0139××
×*5EC-245
HO2S1 (B2) P0152 0152 —××EC-205
HO2S1 (B2) P0153 0153××
×*5EC-214
HO2S1 (B2) P0154 0154 —××EC-226
HO2S2 (B2) P0158 0158 —××EC-236

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-55
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2004 November 2004 FX35/FX45HO2S2 (B2) P0159 0159××
×*5EC-245
FUEL SYS-LEAN-B1 P0171 0171 — —×EC-256
FUEL SYS-RICH-B1 P0172 0172 — —×EC-265
FUEL SYS-LEAN-B2 P0174 0174 — —×EC-256
FUEL SYS-RICH-B2 P0175 0175 — —×EC-265
FTT SENSOR P0181 0181 — —×EC-273
FTT SEN/CIRCUIT P0182 0182 — —×EC-279
FTT SEN/CIRCUIT P0183 0183 — —×EC-279
TP SEN 1/CIRC P0222 0222 — — —EC-284
TP SEN 1/CIRC P0223 0223 — — —EC-284
MULTI CYL MISFIRE P0300 0300 — —×EC-291
CYL 1 MISFIRE P0301 0301 — —×EC-291
CYL 2 MISFIRE P0302 0302 — —×EC-291
CYL 3 MISFIRE P0303 0303 — —×EC-291
CYL 4 MISFIRE P0304 0304 — —×EC-291
CYL 5 MISFIRE P0305 0305 — —×EC-291
CYL 6 MISFIRE P0306 0306 — —×EC-291
KNOCK SEN/CIRC-B1 P0327 0327 — —×EC-297
KNOCK SEN/CIRC-B1 P0328 0328 — —×EC-297
CKP SEN/CIRCUIT P0335 0335 — —×EC-302
CMP SEN/CIRC-B1 P0340 0340 — —×EC-308
CMP SEN/CIRC-B2 P0345 0345 — —×EC-308
TW CATALYST SYS-B1 P0420 0420××
×*5EC-316
TW CATALYST SYS-B2 P0430 0430××
×*5EC-316
EVAP PURG FLOW/MON P0441 0441××
×*5EC-321
EVAP SMALL LEAK P0442 0442××
×*5EC-326
PURG VOLUME CONT/V P0444 0444 — —×EC-335
PURG VOLUME CONT/V P0445 0445 — —×EC-335
VENT CONTROL VALVE P0447 0447 — —×EC-342
EVAP SYS PRES SEN P0451 0451 — —×EC-349
EVAP SYS PRES SEN P0452 0452 — —×EC-352
EVAP SYS PRES SEN P0453 0453 — —×EC-358
EVAP GROSS LEAK P0455 0455 —×
×*5EC-366
EVAP VERY SML LEAK P0456 0456
×*4××EC-374
FUEL LEV SEN SLOSH P0460 0460 — —×EC-384
FUEL LEVEL SENSOR P0461 0461 — —×EC-386
FUEL LEVL SEN/CIRC P0462 0462 — —×EC-388
FUEL LEVEL SEN/CIRC P0463 0463 — —×EC-388
VEH SPEED SEN/CIRC*7P0500 0500 — —×EC-390
ISC SYSTEM P0506 0506 — —×EC-392
ISC SYSTEM P0507 0507 — —×EC-394
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Test limit
(GST only)1st trip DTCReference
page CONSULT-II
GST*
2ECM*3

EC-56
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2004 November 2004 FX35/FX45
PW ST P SEN/CIRC P0550 0550 — —×EC-396
ECM P0605 0605 — —× or —EC-401
PNP SW/CIRC P0705 0705 — —×AT- 11 2
ATF TEMP SEN/CIRC P0710 0710 — —×AT-139
VEH SPD SEN/CIR AT*7P0720 0720 — —×AT- 11 6
ENGINE SPEED SIG P0725 0725 — —×AT-121
TCC SOLENOID/CIRC P0740 0740 — —×AT-123
A/T TCC S/V FNCTN P0744 0744 — —×AT-125
L/PRESS SOL/CIRC P0745 0745 — —×AT-127
ECM BACK UP/CIRC P1065 1065 — —×EC-404
I N T / V T I M V / C I R - B 1 P 1111 1111 — —×EC-408
ETC ACTR P1121 1121 — — —EC-415
ETC FUNCTION/CIRC P1122 1122 — — —EC-417
ETC MOT PWR P1124 1124 — — —EC-423
ETC MOT PWR P1126 1126 — — —EC-423
ETC MOT P1128 1128 — — —EC-428
INT/V TIM V/CIR-B2 P1136 1136 — —×EC-408
HO2S1 (B1) P1143 1143××
×*5EC-433
HO2S1 (B1) P1144 1144××
×*5EC-439
HO2S2 (B1) P1146 1146××
×*5EC-446
HO2S2 (B1) P1147 1147××
×*5EC-457
CLOSED LOOP-B1 P1148 1148 — — —EC-468
HO2S1 (B2) P1163 1163××
×*5EC-433
HO2S1 (B2) P1164 1164××
×*5EC-439
HO2S2 (B2) P1166 1166××
×*5EC-446
HO2S2 (B2) P1167 1167××
×*5EC-457
CLOSED LOOP-B2 P1168 1168 — — —EC-468
TCS C/U FUNCTN P1211 1211 — —×EC-470
TCS/CIRC P1212 1212 — —×EC-471
ENG OVER TEMP P1217 1217 — — —EC-472
CTP LEARNING P1225 1225 — —×EC-485
CTP LEARNING P1226 1226 — —×EC-487
SENSOR POWER/CIRC P1229 1229 — — —EC-489
PURG VOLUME CONT/V P1444 1444 — —×EC-494
VENT CONTROL VALVE P1446 1446 — —×EC-502
ASCD SW*8P1564 1564 — — —EC-515, EC-
508
ACC COMMAND VALUE*9P1568 1568 — — —EC-521
ASCD BRAKE SW*8P1572 1572 — — —EC-532, EC-
522
ASCD VHL SPD SEN*8P1574 1574 — — —EC-543, EC-
541
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Te s t l i m i t
(GST only)1st trip DTCReference
page CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-57
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2004 November 2004 FX35/FX45
*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.
*5: This is not displayed with GST.
*6: The troubleshooting for this DTC needs CONSULT-II.
*7: When the fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.
*8: For models with ICC or ASCD system.
*9: For models with ICC system.
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-67, "
HOW
TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION" .
For malfunctions in which 1st trip DTCs are displayed, refer to EC-54, "
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.
NATS MALFUNCTIONP1610 -
P16151610 - 1615 — —×EC-68
TP SEN/CIRC A/T P1705 1705 — — —AT- 1 3 6
P-N POS SW/CIRCUIT P1706 1706 — —×EC-545
TURBINE REV S/CIRC P1716 1716 — —×AT- 1 4 3
A/T INTERLOCK P1730 1730 — — —AT- 1 4 7
I/C SOLENOID/CIRC P1752 1752 — — —AT- 1 5 2
I/C SOLENOID FNCTN P1754 1754 — — —AT- 1 5 4
FR/B SOLENOID/CIRC P1757 1757 — — —AT- 1 5 6
FR/B SOLENOID/CIRC P1759 1759 — — —AT- 1 5 8
D/C SOLENOID/CIRC P1762 1762 — — —AT- 1 6 0
D/C SOLENOID FNCTN P1764 1764 — — —AT- 1 6 2
HLR/C SOL/CIRC P1767 1767 — — —AT- 1 6 4
HLR/C SOL FNCTN P1769 1769 — — —AT- 1 6 6
LC/B SOLENOID/CIRC P1772 1772 — — —AT- 1 6 8
LC/B SOLENOID FNCT P1774 1774 — — —AT- 1 7 0
BRAKE SW/CIRCUIT P1805 1805 — —×EC-550
APP SEN 1/CIRC P2122 2122 — — —EC-555
APP SEN 1/CIRC P2123 2123 — — —EC-555
APP SEN 2/CIRC P2127 2127 — — —EC-562
APP SEN 2/CIRC P2128 2128 — — —EC-562
TP SENSOR P2135 2135 — — —EC-569
APP SENSOR P2138 2138 — — —EC-576
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTest value/
Test limit
(GST only)1st trip DTCReference
page CONSULT-II
GST*
2ECM*3

EC-60
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2004 November 2004 FX35/FX45
SRT Item
The table below shows required self-diagnostic items to set the SRT to “CMPLT”.
*1: 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 indica-
tion)Perfor-
mance Pri-
ority*1Required 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
HO2S 2Heated oxygen sensor 1 P0133, P0153
Heated oxygen sensor 1 P1143, P1163
Heated oxygen sensor 1 P1144, P1164
Heated oxygen sensor 2 P0139, P0159
Heated oxygen sensor 2 P1146, P1166
Heated oxygen sensor 2 P1147, P1167
HO2S HTR 2 Heated oxygen sensor 1 heater P0031, P0032, P0051,
P0052
Heated oxygen sensor 2 heater P0037, P0038, P0057,
P0058
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”

EC-66
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2004 November 2004 FX35/FX45
SRT item Self-diagnostic test item DTCTest value (GST display)
Test limit ApplicationConver-
sion
TID CID
CATA-
LYSTThree 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.×
1/128mm
2
EVAP control system purge flow mon-
itoringP0441 06H 83H Min.×20mV
EVAP control system (Very small
leak)P0456 07H 03H Max.×
1/128mm
2
HO2SHeated oxygen sensor 1 (Bank 1)P0133 09H 04H Max.×10ms
P1143 0AH 84H Min.×10mV
P1144 0BH 04H Max.×10mV
P0132 0CH 04H Max.×10mV
P0134 0DH 04H Max.×1s
Heated oxygen sensor 1 (Bank 2)P0153 11H 05H Max.×10ms
P1163 12H 85H Min.×10mV
P1164 13H 05H Max.×10mV
P0152 14H 05H Max.×10mV
P0154 15H 05H Max.×1s
Heated oxygen sensor 2 (Bank 1)P0139 19H 86H Min.×10mV/
500ms
P1147 1AH 86H Min.×10mV
P1146 1BH 06H Max.×10mV
P0138 1CH 06H Max.×10mV
Heated oxygen sensor 2 (Bank 2)P0159 21H 87H Min.×10mV/
500ms
P1167 22H 87H Min.×10mV
P1166 23H 07H Max.×10mV
P0158 24H 07H Max.×10mV
HO2S
HTRHeated oxygen sensor 1 heater
(Bank 1)P0032 29H 08H Max.×20mV
P0031 2AH 88H Min.×20mV
Heated oxygen sensor 1 heater
(Bank 2)P0052 2BH 09H Max.×20mV
P0051 2CH 89H Min.×20mV
Heated oxygen sensor 2 heater
(Bank 1)P0038 2DH 0AH Max.×20mV
P0037 2EH 8AH Min.×20mV
Heated oxygen sensor 2 heater
(Bank 2)P0058 2FH 0BH Max.×20mV
P0057 30H 8BH Min.×20mV

ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-69
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2004 November 2004 FX35/FX45
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following four functions.
When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting MIL up 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.
MIL Flashing Without DTC
If the ECM is in Diagnostic Test Mode II, MIL may flash when engine is running. In this case, check ECM diag-
nostic test mode. EC-70, "
HOW TO SWITCH DIAGNOSTIC TEST MODE" .
How to switch the diagnostic test (function) modes, and details of the above functions are described later. EC-
70, "HOW TO SWITCH DIAGNOSTIC TEST MODE" .
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

Others
Diagnostic Test
ModeKEY and ENG.
StatusFunction 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 running HEATED OXYGEN SENSOR 1
MONITORThis function allows the fuel mixture condition (lean or
rich), monitored by heated oxygen sensor 1, 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