Page 1017 of 3051

SRT item Self-diagnostic test itemTest value (GST display)
Test limit Application
TID CID
HO2S HTRHeated oxygen sensor 1
heater (front)29H 08H Max. X
2AH 88H Min. X
Heated oxygen sensor 2
heater (rear)2DH 0AH Max. X
2EH 8AH Min. X
EGR SYSTEM
(where fitted)EGR function
(where fitted)31H 8CH Min. X
32H 8CH Min. X
33H 8CH Min. X
34H 8CH Min. X
35H 0CH Max. X
Emission-related Diagnostic Information ItemsNLEC1361S0111X: Applicable Ð: Not applicable
Items
(CONSULT-II screen terms)DTC*1 SRT codeTest value/Test
limit
(GST only)1st trip DTC*1 Reference page
NO SELF DIAGNOSTIC FAIL-
URE INDICATEDP0000ÐÐÐÐ
MAF SEN/CIRCUIT P0100 Ð Ð X EC-679
AIR TEMP SEN/CIRC P0110 Ð Ð X EC-687
COOLANT T SEN/CIRC P0115 Ð Ð X EC-694
THRTL POS SEN/CIRC P0120 Ð Ð X EC-700
HO2S1 (B1) P0130 X X X*2 EC-709
HO2S1 (B1) P0131 X X X*2 EC-717
HO2S1 (B1) P0132 X X X*2 EC-723
HO2S1 (B1) P0133 X X X*2 EC-729
HO2S1 (B1) P0134 X X X*2 EC-739
HO2S1 HTR (B1) P0135 X X X*2 EC-746
HO2S2 (B1) P0137 X X X*2 EC-752
HO2S2 (B1) P0138 X X X*2 EC-761
HO2S2 (B1) P0139 X X X*2 EC-770
HO2S2 (B1) P0140 X X X*2 EC-779
HO2S2 HTR (B1) P0141 X X X*2 EC-786
FUEL SYS-LEAN/BK1 P0171 Ð Ð X EC-792
FUEL SYS-RICH/BK1 P0172 Ð Ð X EC-800
MULTI CYL MISFIRE P0300 Ð Ð X EC-808
CYL 1 MISFIRE P0301 Ð Ð X EC-808
CYL 2 MISFIRE P0302 Ð Ð X EC-808
CYL 3 MISFIRE P0303 Ð Ð X EC-808
CYL 4 MISFIRE P0304 Ð Ð X EC-808
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
Emission-related Diagnostic Information (Cont'd)
EC-592
Page 1018 of 3051

Items
(CONSULT-II screen terms)DTC*1 SRT codeTest value/Test
limit
(GST only)1st trip DTC*1 Reference page
KNOCK SEN/CIRC-B1 P0325 Ð Ð Ð EC-815
CKP SEN/CIRCUIT P0335 Ð Ð X EC-819
CMP SEN/CIRCUIT P0340 Ð Ð X EC-825
EGR SYSTEM (where fitted) P0400 X X X*2 EC-834
EGR VOL CONT/V CIRC
(where fitted)P0403 Ð Ð X EC-841
TW CATALYST SYS-B1 P0420 X X X*2 EC-848
PURG VOLUME CONT/V P0443 Ð Ð X EC-852
VEH SPEED SEN/CIRC P0500 Ð Ð X EC-858
IACV/AAC VLV/CIRC P0505 Ð Ð X EC-863
CLOSED TP SW/CIRC P0510 Ð Ð X EC-872
ECM P0605 Ð Ð X EC-880
PNP SW/CIRC P0705 Ð Ð XRefer to AT sec-
tion.
ATF TEMP SEN/CIRC P0710 Ð Ð XRefer to AT sec-
tion.
IN PY SPD SEN/CIRC P0715 Ð Ð XRefer to AT sec-
tion.
VEH SPD SEN/CIR AT P0720 Ð Ð XRefer to AT sec-
tion.
ENGINE SPEED SIG P0725 Ð Ð XRefer to AT sec-
tion.
TCC SOLENOID/CIRC P0740 Ð Ð XRefer to AT sec-
tion.
L/PRESS SOL/CIRC P0745 Ð Ð XRefer to AT sec-
tion.
ENG OVER TEMP P1217 Ð Ð X EC-882
CKP SENSOR (COG) P1336 Ð Ð X EC-909
EGR TEMP SEN/CIRC
(where fitted)P1401 Ð Ð X EC-915
EGR SYSTEM (where fitted) P1402 X X X*2 EC-921
A/T DIAG COMM LINE P1605 Ð Ð X EC-928
TP SEN/CIRC A/T P1705 Ð Ð XRefer to AT sec-
tion.
P-N POS SW/CIRCUIT P1706 Ð Ð X EC-931
O/R CLTCH SOL/CIRC P1760 Ð Ð XRefer to AT sec-
tion.
STEP MOTR CIRC P1777 Ð Ð XRefer to AT sec-
tion.
STEP MOTR FNC P1778 Ð Ð XRefer to AT sec-
tion.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
Emission-related Diagnostic Information (Cont'd)
EC-593
Page 1019 of 3051

Items
(CONSULT-II screen terms)DTC*1 SRT codeTest value/Test
limit
(GST only)1st trip DTC*1 Reference page
LINE PRESS SEN P1791 Ð Ð XRefer to AT sec-
tion.
*1: 1st trip DTC No. is the same as DTC No.
*2: These are not displayed with GST.
How to Erase Emission-related Diagnostic InformationNLEC1361S0112How to Erase DTC (With CONSULT-II)
NOTE:
If the DTC is not for CVT related items (see EC-550), skip steps 2 through 4.
1) If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least
10 seconds and then turn it ªONº (engine stopped) again.
2) Turn CONSULT-II ªONº and touch ªCVTº.
3) Touch ªSELF-DIAG RESULTSº.
4) Touch ªERASEº. [The DTC in the TCM (Transmission control module) will be erased.] Then touch ªBACKº
twice.
5) Touch ªENGINEº.
6) Touch ªSELF-DIAG RESULTSº.
7) Touch ªERASEº. (The DTC in the ECM will be erased.)
+If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased
individually from the ECM and TCM (Transmission control module).
SEF905Z
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
Emission-related Diagnostic Information (Cont'd)
EC-594
Page 1020 of 3051

The emission-related diagnostic information can be erased by selecting ªERASEº in the ªSELF-DIAG
RESULTSº mode with CONSULT-II.
How to Erase DTC (
With GST)
NOTE:
If the DTC is not for CVT related items (see EC-550), skip step 2.
1) If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least
10 seconds and then turn it ªONº (engine stopped) again.
2) Perform ªSELF-DIAGNOSTIC PROCEDURE (Without CONSULT-II)º in AT section titled ªTROUBLE
DIAGNOSISº, ªSelf-diagnosisº. (The engine warm-up step can be skipped when performing the diagnosis
only to erase the DTC.)
3) Select Mode 4 with GST (Generic Scan Tool).
The emission-related diagnostic information can be erased by selecting Mode 4 with GST (Generic Scan Tool).
NOTE:
+If the battery is disconnected, the emission-related diagnostic information will be lost after approx.
24 hours.
+Erasing the emission-related diagnostic information using CONSULT-II or GST is easier and
quicker than switching the mode using the data link connector.
+The following data are cleared when the ECM memory is erased.
1) Diagnostic trouble codes
2) 1st trip diagnostic trouble codes
3) Freeze frame data
4) 1st trip freeze frame data
5) System readiness test (SRT) codes
6) Test values
7) Distance traveled while MI is activated
8) Others
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.
MODELS WITHOUT EURO-OBD SYSTEMNLEC1361S02DTC and 1st Trip DTCNLEC1361S0201The 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. If the same mal-
function 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. In other words, the DTC is stored in the ECM memory when the same malfunction occurs
in two consecutive 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 fail-safe items, the DTC is stored in the
ECM memory even in the 1st trip.
Procedures for clearing the DTC and the 1st trip DTC from the ECM memory are described in ªHow to Erase
Emission-related Diagnostic Informationº, EC-596.
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 ªWork Flowº procedure Step II, refer to EC-621. Then perform ªDTC Confirmation Proce-
dureº or ªOverall Function Checkº to try to duplicate the problem. If the malfunction 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.
Without CONSULT-II
ECM displays the DTC by a set of four digit numbers with MI illumination in the diagnostic test mode II (Self-
diagnostic results). Example: 0100, 0115, 0340, 1335, etc.
With CONSULT-II
CONSULT-II displays the DTC in ªSELF-DIAG RESULTSº mode. Examples: P0100, P0115, P0340, P1335,
etc.
(CONSULT-II also displays the malfunctioning component or system.)
+1st trip DTC No. is the same as DTC No.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
Emission-related Diagnostic Information (Cont'd)
EC-595
Page 1021 of 3051

+Output of a DTC indicates a malfunction. However, ECM in the diagnostic test mode II (Self-diag-
nostic results) does not indicate whether the malfunction is still occurring or has occurred in the
past and has returned to normal. CONSULT-II can identify malfunction status as shown below.
Therefore, the use of CONSULT-II (if available) is recommended.
A sample CONSULT-II display for DTC and 1st trip DTC is shown below. DTC or 1st trip DTC of a malfunc-
tion is displayed in the 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 ª0º.
If a 1st trip DTC is stored in the ECM, the time data will be ª[1t]º.
SEF992X
Freeze Frame Data and 1st Trip Freeze Frame DataNLEC1361S0202The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant
temperature, short term fuel trim, long term fuel trim, engine speed, vehicle speed, throttle valve opening, 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 called freeze frame data and displayed on CONSULT-II. For
details, see EC-610.
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no prior-
ity for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once
freeze frame data 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.
If freeze frame data is stored in the ECM memory and another freeze frame data occurs later, the first (origi-
nal) freeze frame data remains unchanged in the ECM memory.
Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM
memory is erased. Procedures for clearing the ECM memory are described in ªHow to Erase Emission-related
Diagnostic Informationº, EC-596.
How to Erase Emission-related Diagnostic InformationNLEC1361S0203How to Erase DTC (With CONSULT-II)
1) If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least
10 seconds and then turn it ªONº (engine stopped) again.
2) Touch ªENGINEº.
3) Touch ªSELF-DIAG RESULTSº.
4) Touch ªERASEº. (The DTC in the ECM will be erased.)
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
Emission-related Diagnostic Information (Cont'd)
EC-596
Page 1022 of 3051

SEF993X
The emission related diagnostic information in the ECM can be erased by selecting ªERASEº in the ªSELF-
DIAG RESULTSº mode with CONSULT-II.
How to Erase DTC (
Without CONSULT-II)
1) If the ignition switch stays ªONº after repair work, be sure to turn ignition switch ªOFFº once. Wait at least
10 seconds and then turn it ªONº (engine stopped) again.
2) Change the diagnostic test mode from Mode II to Mode I by using the data link connector. (See EC-600.)
The emission related diagnostic information in the ECM can be erased by changing the diagnostic test mode.
+If the battery is disconnected, the emission-related diagnostic information will be lost after approx.
24 hours.
+Erasing the emission-related diagnostic information using CONSULT-II is easier and quicker than
switching the diagnostic test mode using the data link connector.
+The following data are cleared when the ECM memory is erased.
1) Diagnostic trouble codes
2) 1st trip diagnostic trouble codes
3) Freeze frame data
4) 1st trip freeze frame data
5) Others
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.
SEF543X
NATS (Nissan Anti-theft System)NLEC1362+If the security indicator lights up with the ignition switch
in the ªONº position or ªNATS MALFUNCTIONº is dis-
played on ªSELF-DIAG RESULTSº screen, perform self-
diagnostic results mode with CONSULT-II using NATS pro-
gram card. Refer to NATS (Nissan Anti-Theft System) in EL
section.
+Confirm no self-diagnostic results of NATS is displayed
before touching ªERASEº in ªSELF-DIAG RESULTSº
mode with CONSULT-II.
+When replacing ECM, initialization of NATS system and
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
Emission-related Diagnostic Information (Cont'd)
EC-597
Page 1023 of 3051

registration of all NATS ignition key IDs must be carried
out with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner.
Regarding the procedure of NATS initialization and NATS
ignition key ID registration, refer to CONSULT-II operation
manual, NATS.
Malfunction Indicator (MI)
DESCRIPTIONNLEC1363
SAT652J
The MI is located on the instrument panel.
1. The MI will light up when the ignition switch is turned ON without the engine running. This is a bulb check.
+If the MI does not light up, refer to EL-156, ªWARNING LAMPSº or see EC-1060.
2. When the engine is started, the MI should go off.
If the MI remains on, the on board diagnostic system has detected an engine system malfunction.
On Board Diagnostic System FunctionNLEC1363S01The on board diagnostic system has the following four functions.
Diagnostic Test Mode I
1. BULB CHECK:
This function checks the MI bulb for damage (blown, open circuit, etc.).
If the MI does not come on, check MI circuit and ECM test mode selector. (See the following page.)
2. MALFUNCTION WARNING:
MI Condition
ON When the malfunction is detected or the ECM's CPU is malfunctioning.
OFF No malfunction.
Diagnostic Test Mode II
3. SELF-DIAGNOSTIC RESULTS:
This function allows DTCs and 1st trip DTCs to be read.
4. HEATED OXYGEN SENSOR 1 MONITOR (FRONT):
This function allows the fuel mixture condition (lean or rich), monitored by heated oxygen sensor 1 (front),
to be read.
MI Flashing without DTC
NLEC1363S0101If the ECM is in Diagnostic Test Mode II, MI may flash when engine is running. In this case, check ECM test
mode following ªHow to Switch Diagnostic Test Modesº.
How to switch the diagnostic test (function) modes, and details of the above functions are described later.
(Refer to EC-600.)
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
NATS (Nissan Anti-theft System) (Cont'd)
EC-598
Page 1024 of 3051
Condition Diagnostic Test Mode I Diagnostic Test Mode II
Ignition switch in ªONº position
Engine stopped
BULB CHECK SELF-DIAGNOSTIC RESULTS
Engine running
MALFUNCTION WARNINGHEATED OXYGEN SENSOR 1
MONITOR (FRONT)
The following emission-related diagnostic information is cleared when the ECM memory is erased.
1) Diagnostic trouble codes
2) 1st trip diagnostic trouble codes
3) Freeze frame data
4) 1st trip freeze frame data
5) System readiness test (SRT) codes
6) Test values
7) Distance traveled while MI is activated
8) Others
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONSR20DE
Malfunction Indicator (MI) (Cont'd)
EC-599