Nissan Frontier D40. Instruction — part 434
ECM
EC-427
< ECU DIAGNOSIS >
[QR25DE]
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5GR INCORRECT RATIO*
7
P0735
0735
—
2
×
TORQUE CONVERTER
P0740
0740
—
2
×
TORQUE CONVERTER
P0744
0744
—
2
×
PC SOLENOID A
P0745
0745
—
2
×
P-N POS SW/CIRCUIT
P0850
0850
—
2
×
CLOSED LOOP-B1
P1148
1148
—
1
×
ENG OVER TEMP
P1217
1217
—
1
×
CTP LEARNING
P1225
1225
—
2
—
CTP LEARNING
P1226
1226
—
2
—
COLD START CONTROL
P1421
1421
—
2
×
BAT CURRENT SENSOR
P1550
1550
—
2
—
BAT CURRENT SENSOR
P1551
1551
—
2
—
BAT CURRENT SENSOR
P1552
1552
—
2
—
BAT CURRENT SENSOR
P1553
1553
—
2
—
BAT CURRENT SENSOR
P1554
1554
—
2
—
ASCD SW
P1564
1564
—
1
—
ASCD BRAKE SW
P1572
1572
—
1
—
ASCD VHL SPD SEN
P1574
1574
—
1
—
LOCK MODE
P1610
1610
—
2
—
ID DISCORD IMMU-ECM
P1611
1611
—
2
—
CHAIN OF ECM-IMMU
P1612
1612
—
2
—
CHAIN OF IMMU-KEY
P1614
1614
—
2
—
DIFFRENCE OF KEY
P1615
1615
—
2
—
IN PULY SPEED
P1715
1715
—
2
—
INTERLOCK
P1730
1730
—
1
×
INPUT CLUTCH SOL
P1752
1752
—
1
×
I/C SOLENOID/CIRC
P1754
1754
—
1
×
FR BRAKE SOLENOID
P1757
1757
—
1
×
FR/B SOLENOID/CIRC
P1759
1759
—
1
×
DRCT CLUTCH SOL
P1762
1762
—
1
×
D/C SOLENOID/CIRC
P1764
1764
—
1
×
HLR CLUTCH SOLENOID
P1767
1767
—
1
×
HLR/C SOL/CIRC
P1769
1769
—
1
×
L C BRAKE SOLENOID
P1772
1772
—
1
×
L C BRAKE SOLENOID
P1774
1774
—
1
×
BRAKE SW/CIRCUIT
P1805
1805
—
2
—
ETC MOT PWR
P2100
2100
—
1
×
ETC FUNCTION/CIRC
P2101
2101
—
1
×
ETC MOT PWR
P2103
2103
—
1
×
ETC MOT
P2118
2118
—
1
×
ETC ACTR
P2119
2119
—
1
×
APP SEN 1/CIRC
P2122
2122
—
1
×
Items
(CONSULT-III screen terms)
DTC*
1
SRT code
Trip
MIL
lighting up
Reference
page
CONSULT-III
GST*
2
ECM*
3
EC-428
< ECU DIAGNOSIS >
[QR25DE]
ECM
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012/ISO 15031-6.
*3: In Diagnostic Test Made II (Self-diagnostic results), this number is controlled by NISSAN.
*4: The troubleshooting for this DTC needs CONSULT-III.
*5: When the ECM is in the mode of displaying SRT status, MIL may flash. For the details, refer to "How to Display SRT Status".
*6: SRT code will not be set if the self-diagnostic result is NG.
*7: When the fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.
*8: When erasing this DTC, always use CONSULT-III or GST.
Emission-related Diagnostic Information
INFOID:0000000005575692
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 saved 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 saved 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 "HOW TO
ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION".
For malfunctions in which 1st trip DTCs are displayed, refer to "EMISSION-RELATED DIAGNOSTIC INFOR-
MATION ITEMS". These items are required by legal regulations to continuously monitor the system/compo-
nent. In addition, the items monitored non-continuously are also displayed on CONSULT-III.
1st trip DTC is specified in Service $07 of SAE J1979/ISO 15031-5. 1st trip DTC detection occurs without illu-
minating 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-14, "Trouble Diagnosis Introduction"
. Then per-
form DTC Confirmation Procedure or Overall Function Check 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/ISO 15031-6.
(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.
APP SEN 1/CIRC
P2123
2123
—
1
×
APP SEN 2/CIRC
P2127
2127
—
1
×
APP SEN 2/CIRC
P2128
2128
—
1
×
TP SENSOR
P2135
2135
—
1
×
APP SENSOR
P2138
2138
—
1
×
A/F SENSOR1 (B1)
P2A00
2A00
—
2
×
Items
(CONSULT-III screen terms)
DTC*
1
SRT code
Trip
MIL
lighting up
Reference
page
CONSULT-III
GST*
2
ECM*
3
ECM
EC-429
< ECU DIAGNOSIS >
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• 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-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 displayed 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, engine 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 called freeze frame data and displayed on CONSULT-III or
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-III screen, not on the GST. For
details, see "FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA".
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 priority
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 saved 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 freeze frame data is stored in the ECM memory and freeze
frame data with the same priority occurs later, the first (original) 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 mem-
ory is erased. Procedures for clearing the ECM memory are described in "EMISSION-RELATED DIAGNOS-
TIC INFORMATION ITEMS".
SYSTEM READINESS TEST (SRT) CODE
System Readiness Test (SRT) code is specified in Service $01 of SAE J1979/ISO 15031-5.
As part of an enhanced emissions test for Inspection & Maintenance (I/M), certain states require the status of
SRT be used to indicate whether the ECM has completed self-diagnosis of major emission systems and com-
ponents. Completion must be verified in order for the emissions inspection to proceed.
If a vehicle is rejected for a State emissions inspection due to one or more SRT items indicating “INCMP”, use
the information in this Instruction 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 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:
Priority
Items
1
Freeze frame data
Misfire — DTC: P0300 - P0304
Fuel Injection System Function — DTC: P0171, P0172
2
Except the above items (Includes A/T related items)
3
1st trip freeze frame data
EC-430
< ECU DIAGNOSIS >
[QR25DE]
ECM
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-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 show OK results in a single cycle (Ignition OFF-ON-OFF), the SRT will
indicate “CMPLT”.
→
Case 1 above
When all SRT related self-diagnoses show OK results through several different cycles, the SRT will indicate
“CMPLT” at the time the respective self-diagnoses have at least one OK result.
→
Case 2 above
SRT item
(CONSULT-III indica-
tion)
Perfor-
mance
Priority*
Required self-diagnostic items to set the SRT to “CMPLT”
Corresponding DTC No.
CATALYST
2
Three way catalyst function
P0420
EVAP SYSTEM
1
EVAP control system
P0442
2
EVAP control system
P0456
2
EVAP control system purge flow monitoring
P0441
HO2S
1
Air fuel ratio (A/F) sensor 1
P0133
Heated oxygen sensor 2
P0137
Heated oxygen sensor 2
P0138
Heated oxygen sensor 2
P0139
EGR/VVT SYSTEM
3
Intake value timing control function
P0011
Self-diagnosis result
Example
Diagnosis
Ignition 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
—
NG
NG
(Consecutive
NG)
(1st trip)
DTC
1st trip DTC
—
1st trip DTC
DTC
(= MIL “ON”)
SRT of EGR
“INCMP”
“INCMP”
“INCMP”
“CMPLT”
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