Ac system INFINITI QX4 2001 Factory Service Manual

SRT Item=NBEC0031S0310The table below shows required self-diagnostic items to set the SRT to ªCMPLTº.
SRT item
(CONSULT-II indica-
tion)Perfor-
mance Pri-
ority*Required self-diagnostic items to set the SRT to ªCMPLTºCorresponding
DTC No.
CATALYST 3 Three way catalyst function P0420, P0430
EVAP SYSTEM 2 EVAP control system (small leak) (negative pressure) P0440
3 EVAP control system (very small leak) (negative pressure)/
(positive pressure)P1441
3 EVAP control system purge flow monitoring P1447
O2 SENSOR 3 Heated oxygen sensor 1 (front) (circuit) P0130, P0150
Heated oxygen sensor 1 (front) (lean shift monitoring) P0131, P0151
Heated oxygen sensor 1 (front) (rich shift monitoring) P0132, P0152
Heated oxygen sensor 1 (front) (response monitoring) P0133, P0153
Heated oxygen sensor 1 (front) (high voltage) P0134, P0154
Heated oxygen sensor 2 (rear) (min. voltage monitoring) P0137, P0157
Heated oxygen sensor 2 (rear) (max. voltage monitoring) P0138, P0158
Heated oxygen sensor 2 (rear) (response monitoring) P0139, P0159
Heated oxygen sensor 2 (rear) (high voltage) P0140, P0160
O2 SEN HEATER 3 Heated oxygen sensor 1 heater (front) P0135, P0155
Heated oxygen sensor 2 heater (rear) P0141, P0161
*: 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.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-62

SRT Set Timing=NBEC0031S0311SRT is set as ªCMPLTº 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.
Self-diagnosis resultExample
DiagnosisIgnition cycle
+ON,OFF+ON,OFF+ON,OFF+ON,
All OK Case 1 P0400 OK (1) Ð (1) OK (2) Ð (2)
P0402 OK (1) Ð (1) Ð (1) OK (2)
P1402 OK (1) OK (2) Ð (2) Ð (2)
SRT of EGR ªCMPLTº ªCMPLTº ªCMPLTº ªCMPLTº
Case 2 P0400 OK (1) Ð (1) Ð (1) Ð (1)
P0402 Ð (0) Ð (0) OK (1) Ð (1)
P1402 OK (1) OK (2) Ð (2) Ð (2)
SRT of EGR ªINCMPº ªINCMPº ªCMPLTº ªCMPLTº
NG exists Case 3 P0400 OK OK Ð Ð
P0402 Ð Ð Ð Ð
P1402 NG Ð NGNG
(Consecutive NG)
(1st trip)
DTC1st trip DTC Ð 1st trip DTCDTC
(= MIL ªONº)
SRT of EGR ªINCMPº ªINCMPº ªINCMPº ªCMPLTº
OK: Self-diagnosis is carried out and the result is OK.
NG: Self-diagnosis is carried out and the result is NG.
Ð: 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 ªCMPLTº.,Case 1 above
When all SRT related self-diagnoses showed OK results through several different cycles, the SRT will indi-
cate ªCMPLTº at the time the respective self-diagnoses have at least one OK result.,Case 2 above
If one or more SRT related self-diagnoses showed NG results in 2 consecutive cycles, the SRT will also indi-
cate ªCMPLTº.,Case 3 above
The table above shows that the minimum number of cycles for setting SRT as ªINCMPº is one (1) for each
self-diagnosis (Case1&2)ortwo(2)foroneofself-diagnoses (Case 3). However, in preparation for the state
emissions inspection, it is unnecessary of each self-diagnosis to be executed twice (Case 3) for the following
reasons:
IThe SRT will indicate ªCMPLTº at the time the respective self-diagnoses have one (1) OK result.
IThe emissions inspection requires ªCMPLTº of the SRT only with OK self-diagnosis results.
IWhen, during SRT driving pattern, 1st trip DTC (NG) is detected prior to ªCMPLTº of SRT, the self-diag-
nosis memory must be erased from ECM after repair.
IIf the 1st trip DTC is erased, all the SRT will indicate ªINCMPº.
NOTE:
SRT can be set as ªCMPLTº together with the DTC(s). Therefore, DTC check must always be carried out prior
to the state emission inspection even though the SRT indicates ªCMPLTº.
SRT Service ProcedureNBEC0031S0312If a vehicle has failed the state emissions inspection due to one or more SRT items indicating ªINCMPº, review
the flowchart diagnostic sequence on the next page.
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-63

SEF170Z
*1 EC-60 *2 EC-64 *3 EC-65
How to Display SRT CodeNBEC0031S0301With CONSULT-II
Selecting ªSRT STATUSº in ªDTC CONFIRMATIONº mode with CONSULT-II.
For items whose SRT codes are set, a ªCMPLTº is displayed on the CONSULT-II screen; for items whose SRT
codes are not set, ªINCMPº is displayed.
With GST
Selecting Mode 1 with GST (Generic Scan Tool)
A sample of CONSULT-II display for SRT code is shown below.
ªINCMPº means the self-diagnosis is incomplete and SRT is not set. ªCMPLTº means the self-diagnosis is
complete and SRT is set.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-64

SEF949Z
How to Set SRT CodeNBEC0031S0302To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each
diagnosis may require a long period of actual driving under various conditions.
With CONSULT-II
Perform corresponding DTC Confirmation Procedure one by one based on ªPerformance Priorityº in the table
on EC-62.
Without CONSULT-II
The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The
driving pattern should be performed one or more times to set all SRT codes.
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-65

Driving PatternNBEC0031S0303
SEF947Y
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-66

IThe time required for each diagnosis varies with road surface conditions, weather, altitude, individual driv-
ing habits, etc.
Zone A refers to the range where the time required, for the diagnosis under normal conditions*, is the
shortest.
Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed
within zone A.
*: Normal conditions refer to the following:
þ Sea level
þ Flat road
þ Ambient air temperature: 20 - 30ÉC (68 - 86ÉF)
þ Diagnosis is performed as quickly as possible under normal conditions.
Under different conditions [For example: ambient air temperature other than 20 - 30ÉC (68 - 86ÉF)], diag-
nosis may also be performed.
Pattern 1:
IThe engine is started at the engine coolant temperature of þ10 to 35ÉC (14 to 95ÉF)
(where the voltage between the ECM terminal 70 and ground is 3.0 - 4.3V).
IThe engine must be operated at idle speed until the engine coolant temperature is greater than 70ÉC
(158ÉF) (where the voltage between the ECM terminal 70 and ground is lower than 1.4V).
IThe engine is started at the fuel tank temperature of warmer than 0ÉC (32ÉF) (where the voltage
between the ECM terminal 92 and ground is less than 4.1V).
Pattern 2:
IWhen steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted.
In this case, the time required for diagnosis may be extended.
Pattern 3:
IThe driving pattern outlined in *2 must be repeated at least 3 times.
Pattern 4:
ITests are performed after the engine has been operated for at least 17 minutes.
IThe accelerator pedal must be held very steady during steady-state driving.
IIf the accelerator pedal is moved, the test must be conducted all over again.
*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then release the accelerator pedal
and keep it released for more than 10 seconds. Depress the accelerator pedal until vehicle speed is 90 km/h
(56 MPH) again.
*2: Operate the vehicle in the following driving pattern.
1) Decelerate vehicle to 0 km/h (0 MPH) and let engine idle.
2) Repeat driving pattern shown below at least 10 times.
IDuring acceleration, hold the accelerator pedal as steady as possible.
SEF414S
*3: Checking the vehicle speed with GST is advised.
Suggested Transmission Gear Position for A/T Models
Set the selector lever in the ªDº position with the overdrive switch turned ON.
Suggested upshift speeds for M/T models
Shown below are suggested vehicle speeds for shifting into a higher gear. These suggestions relate to fuel
economy and vehicle performance. Actual upshift speeds will vary according to road conditions, the weather
and individual driving habits.
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-67

For normal acceleration in low altitude areas
[less than 1,219 m (4,000 ft)]:For quick acceleration in low altitude
areas and high altitude areas
[over 1,219 m (4,000 ft)]:
Gear changeACCEL shift point
km/h (MPH)CRUISE shift point
km/h (MPH)km/h (MPH)
1st to 2nd 21 (13) 21 (13) 24 (15)
2nd to 3rd 37 (23) 26 (16) 40 (25)
3rd to 4th 53 (33) 44 (27) 64 (40)
4th to 5th 63 (39) 58 (36) 72 (45)
Suggested Maximum Speed in Each Gear
Downshift to a lower gear if the engine is not running smoothly, or if you need to accelerate.
Do not exceed the maximum suggested speed (shown below) in any gear. For level road driving, use the
highest gear suggested for that speed. Always observe posted speed limits and drive according to the road
conditions to ensure safe operation. Do not over-rev the engine when shifting to a lower gear as it may cause
engine damage or loss of vehicle control.
Gear km/h (MPH)
1st 50 (30)
2nd 89 (55)
3rd 128 (80)
4th Ð
5th Ð
TEST VALUE AND TEST LIMIT (GST ONLY Ð NOT APPLICABLE TO CONSULT-II)NBEC0031S04The following is the information specified in Mode 6 of SAE J1979.
The test value is a parameter used to determine whether a system/circuit diagnostic test is ªOKº or ªNGº 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.
Items for which these data (test value and test limit) are displayed are the same as SRT code items (30 test
items).
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.
X: Applicable Ð: Not applicable
SRT item Self-diagnostic test itemTest value (GST display)
Test limit Application
TID CID
C ATA LY S TThree way catalyst function
(Right bank)01H 01H Max. X
Three way catalyst function
(Left bank)03H 02H Max. X
EVAP SYSTEMEVAP control system
(Small leak)05H 03H Max. X
EVAP control system purge flow
monitoring06H 83H Min. X
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-68

SRT item Self-diagnostic test itemTest value (GST display)
Test limit Application
TID CID
O2 SENSORHeated oxygen sensor 1 (front)
(bank 1)09H 04H Max. X
0AH 84H Min. X
0BH 04H Max. X
0CH 04H Max. X
0DH 04H Max. X
Heated oxygen sensor 1 (front)
(bank 2)11H 05H Max. X
12H 85H Min. X
13H 05H Max. X
14H 05H Max. X
15H 05H Max. X
Heated oxygen sensor 2 (rear)
(bank 1)19H 86H Min. X
1AH 86H Min. X
1BH 06H Max. X
1CH 06H Max. X
Heated oxygen sensor 2 (rear)
(bank 2)21H 87H Min. X
22H 87H Min. X
23H 07H Max. X
24H 07H Max. X
O2 SENSOR HEATERHeated oxygen sensor 1 (front) heater
(bank 1)29H 08H Max. X
2AH 88H Min. X
Heated oxygen sensor 1 (front) heater
(bank 2)2BH 09H Max. X
2CH 89H Min. X
Heated oxygen sensor 2 (rear) heater
(bank 1)2DH 0AH Max. X
2EH 8AH Min. X
Heated oxygen sensor 2 (rear) heater
(bank 2)2FH 0BH Max. X
30H 8BH Min. X
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMSNBEC0031S05X: 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 DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000ÐÐÐÐ
MAF SEN/CIRCUIT P0100 Ð Ð X EC-150
ABSL PRES SEN/CIRC P0105 Ð Ð X EC-158
AIR TEMP SEN/CIRC P0110 Ð Ð X EC-164
COOLANT T SEN/CIRC P0115 Ð Ð X EC-169
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-69

Items
(CONSULT-II screen terms)DTC*1 SRT codeTest value/ Test
limit
(GST only)1st trip DTC*1 Reference page
THRTL POS SEN/CIRC P0120 Ð Ð X EC-174
*COOLAN T SEN/CIRC P0125 Ð Ð X EC-187
HO2S1 (B1) P0130 X X X*2 EC-192
HO2S1 (B1) P0131 X X X*2 EC-202
HO2S1 (B1) P0132 X X X*2 EC-210
HO2S1 (B1) P0133 X X X*2 EC-218
HO2S1 (B1) P0134 X X X*2 EC-231
HO2S1 HTR (B1) P0135 X X X*2 EC-240
HO2S2 (B1) P0137 X X X*2 EC-247
HO2S2 (B1) P0138 X X X*2 EC-257
HO2S2 (B1) P0139 X X X*2 EC-267
HO2S2 (B1) P0140 X X X*2 EC-277
HO2S2 HTR (B1) P0141 X X X*2 EC-286
HO2S1 (B2) P0150 X X X*2 EC-192
HO2S1 (B2) P0151 X X X*2 EC-202
HO2S1 (B2) P0152 X X X*2 EC-210
HO2S1 (B2) P0153 X X X*2 EC-218
HO2S1 (B2) P0154 X X X*2 EC-231
HO2S1 HTR (B2) P0155 X X X*2 EC-240
HO2S2 (B2) P0157 X X X*2 EC-247
HO2S2 (B2) P0158 X X X*2 EC-257
HO2S2 (B2) P0159 X X X*2 EC-267
HO2S2 (B2) P0160 X X X*2 EC-277
HO2S2 HTR (B2) P0161 X X X*2 EC-286
FUEL SYS-LEAN/BK1 P0171 Ð Ð X EC-294
FUEL SYS-RICH/BK1 P0172 Ð Ð X EC-302
FUEL SYS-LEAN/BK2 P0174 Ð Ð X EC-294
FUEL SYS-RICH/BK2 P0175 Ð Ð X EC-302
FUEL TEMP SEN/CIRC P0180 Ð Ð X EC-309
ENG OVER TEMP P0217 Ð Ð X EC-314
MULTI CYL MISFIRE P0300 Ð Ð X EC-320
CYL 1 MISFIRE P0301 Ð Ð X EC-320
CYL 2 MISFIRE P0302 Ð Ð X EC-320
CYL 3 MISFIRE P0303 Ð Ð X EC-320
CYL 4 MISFIRE P0304 Ð Ð X EC-320
CYL 5 MISFIRE P0305 Ð Ð X EC-320
CYL 6 MISFIRE P0306 Ð Ð X EC-320
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-70

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-328
CPS/CIRCUIT (POS) P0335 Ð Ð X EC-334
CAM PS/CIRC (PHS) P0340 Ð Ð X EC-342
TW CATALYST SYS-B1 P0420 X X X*2 EC-347
TW CATALYST SYS-B2 P0430 X X X*2 EC-347
EVAP SMALL LEAK P0440 X X X*2 EC-352
PURG VOLUME CONT/V P0443 Ð Ð X EC-367
VENT CONTROL VALVE P0446 Ð Ð X EC-374
EVAP SYS PRES SEN P0450 Ð Ð X EC-381
EVAP GROSS LEAK P0455 X X X*2 EC-394
FUEL LV SE (SLOSH) P0460 Ð Ð X EC-407
FUEL LEVEL SENSOR P0461 Ð Ð X EC-411
FUEL LEVEL SEN/CIRC P0464 Ð Ð X EC-413
VEH SPEED SEN/CIRC P0500 Ð Ð X EC-417
IACV/AAC VLV/CIRC P0505 Ð Ð X EC-422
CLOSED TP SW/CIRC P0510 Ð Ð X EC-431
A/T COMM LINE P0600 Ð Ð Ð EC-440
ECM P0605 Ð Ð X EC-444
PNP SW/CIRC P0705 Ð Ð X AT-111
ATF TEMP SEN/CIRC P0710 Ð Ð X AT-116
VEH SPD SEN/CIR AT P0720 Ð Ð X AT-124
ENGINE SPEED SIG P0725 Ð Ð X AT-130
A/T 1ST GR FNCTN P0731 Ð Ð X AT-136
A/T 2ND GR FNCTN P0732 Ð Ð X AT-143
A/T 3RD GR FNCTN P0733 Ð Ð X AT-151
A/T 4TH GR FNCTN P0734 Ð Ð X AT-157
TCC SOLENOID/CIRC P0740 Ð Ð X AT-165
A/T TCC S/V FNCTN P0744 Ð Ð X AT-170
L/PRESS SOL/CIRC P0745 Ð Ð X AT-174
SFT SOL A/CIRC P0750 Ð Ð X AT-180
SFT SOL B/CIRC P0755 Ð Ð X AT-189
INT/V TIM CONT-B1 P1110 Ð Ð X EC-446
INT/V TIM V/CIR-B1 P1111 Ð Ð XEC-451
SWIRL CONT SOL/V P1130 Ð Ð X EC-458
INT/V TIM CONT-B2 P1135 Ð Ð X EC-446
INT/V TIM V/CIR-B2 P1136 Ð Ð X EC-451
INTK TIM S/CIRC-B1 P1140 Ð Ð X EC-482
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Emission-related Diagnostic Information (Cont'd)
EC-71