ECO mode NISSAN TEANA 2003 Service Manual

DTC P1572 ASCD BRAKE SWITCH
EC-603
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DTC Confirmation ProcedureBBS0053P
CAUTION:
Always drive vehicle at a safe speed.
NOTE:

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.

Procedure for malfunction B is not described here. It takes extremely long time to complete procedure for
malfunction B. By performing procedure for malfunction A, the incident that causes malfunction B can be
detected.
WITH CONSULT-II
TESTING CONDITION:
Steps 4 and 5 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
1. Start engine.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Press CRUISE switch and make sure that CRUISE indicator
lights up.
4. Drive the vehicle for at least 5 consecutive seconds under the
following condition.
If 1st trip DTC is detected, go to EC-606, "
Diagnostic Procedure"
.
If 1st trip DTC is not detected, go to the following step.
5. Drive the vehicle for at least 5 consecutive seconds under the following condition.
6. If 1st trip DTC is detected, go to EC-606, "
Diagnostic Procedure" .
VHCL SPEED SE More than 30 km/h (19 MPH)
Selector lever Suitable position
PBIB2386E
VHCL SPEED SE More than 30 km/h (19 MPH)
Selector lever Suitable position
Driving locationDepress the brake pedal for more than
five seconds so as not to come off from
the above-mentioned vehicle speed.

DTC P1574 ASCD VEHICLE SPEED SENSOR
EC-611
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DTC P1574 ASCD VEHICLE SPEED SENSORPFP:31036
Component DescriptionBBS0053U
The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from “unified
meter and A/C amp.” and the other is from TCM (Transmission control module). The ECM uses these signals
for ASCD control. Refer to EC-363, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for ASCD functions.
On Board Diagnosis LogicBBS0053V
This self-diagnosis has the one trip detection logic.
The MI will not light up for this diagnosis.
NOTE:

If DTC P1574 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-458, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .

If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-538, "
DTC P0605 ECM"
DTC Confirmation ProcedureBBS0053W
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Step 3 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test
is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Drive the vehicle at more than 40 km/h (25 MPH).
4. If DTC is detected, go to EC-612, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
TESTING CONDITION:
Step 2 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test
is expected to be easier, it is unnecessary to lift the vehicle.
1. Start engine.
2. Drive the vehicle at more than 40 km/h (25 MPH).
3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
4. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P1574
1574ASCD vehicle speed
sensorECM detects a difference between two vehicle
speed signals is out of the specified range.

Harness or connectors
(The CAN communication line is open or
shorted.)

Unified meter and A/C amp.

ABS actuator and electric unit (control unit)

Wheel sensor

TCM

ECM
SEF058Y

EC-622
[VQ]
DTC P1715 INPUT SPEED SENSOR (PRIMARY SPEED SENSOR)

DTC P1715 INPUT SPEED SENSOR (PRIMARY SPEED SENSOR)PFP:31935
DescriptionBBS005AZ
ECM receives primary speed sensor signal from TCM through CAN communication line.
CONSULT-II Reference Value in Data Monitor ModeBBS005B0
Specification data are reference values.
On Board Diagnosis LogicBBS005B1
NOTE:

If DTC P1715 is displayed with DTC U1000 or U1001 first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-458, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .

If DTC P1715 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-538, "
DTC P0605 ECM" .

If DTC P1715 is displayed with DTC P0335, first perform the trouble diagnosis for DTC P0335.
Refer to EC-517, "
DTC P0335 CKP SENSOR (POS)" .

If DTC P1715 is displayed with DTC P0340 or P0345, first perform the trouble diagnosis for DTC
P0340, P0345. Refer to EC-524, "
DTC P0340, P0345 CMP SENSOR (PHASE)" .
The MI will not light up for this diagnosis.
DTC Confirmation ProcedureBBS005B2
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine.
4. Drive vehicle at a speed of more than 50 km/h (31 MPH) for at
least 5 seconds.
5. If 1st trip DTC is detected, go to EC-623, "
Diagnostic Procedure"
.
MONITOR ITEM CONDITION SPECIFICATION
I/P PULLY SPD

Vehicle speed: More than 20 km/h (12MPH)Almost the same speed as the
tachometer indication
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1715
1715Input speed sensor
(Primary speed sensor)
(TCM output)Primary speed sensor signal is different
from the theoretical value calculated by
ECM from secondary speed sensor sig-
nal and engine rpm signal.

Harness or connectors
(The CAN communication line is open or
shorted)

Harness or connectors
(Primary speed sensor circuit is open or
shorted)

TCM
SEF058Y

DTC P1715 INPUT SPEED SENSOR (PRIMARY SPEED SENSOR)
EC-623
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WITHOUT CONSULT-II
1. Start engine.
2. Drive vehicle at a speed of more than 50 km/h (31 MPH) for at least 5 seconds.
3. Stop the vehicle.
4. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
5. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
6. If 1st trip DTC is detected, go to EC-623, "
Diagnostic Procedure" .
Diagnostic ProcedureBBS005KS
1. CHECK DTC WITH TCM
Check DTC with TCM. Refer to CVT-24, "
TROUBLE DIAGNOSIS" .
OK or NG
OK >> GO TO 2.
NG >> Perform trouble shooting relevant to DTC indicated.
2. REPLACE TCM
Replace TCM. Refer to CVT-24, "
TROUBLE DIAGNOSIS" .
>>INSPECTION END

EC-624
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DTC P1720 VSS

DTC P1720 VSSPFP:31036
DescriptionBBS005B3
NOTE:
If DTC P1720 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-458, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
ECM receives two vehicle speed signals via CAN communication line. One is sent from “ABS actuator and
electric unit (control unit)” via “unified meter and A/C amp.”, and the other is from TCM (Transmission control
module). ECM uses these signals for engine control.
CONSULT-II Reference Value in Data Monitor ModeBBS005B4
Specification data are reference values.
On Board Diagnosis LogicBBS005B5
The MI will not light up for this self-diagnosis.
DTC Confirmation ProcedureBBS005B6
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine.
4. Drive vehicle at a speed of 20 km/h (12 MPH) or more for at
least 5 seconds without brake pedal depressing.
5. If 1st trip DTC is detected, go to EC-625, "
Diagnostic Procedure"
.
MONITOR ITEM CONDITION SPECIFICATION
VHCL SPEED SE

Turn drive wheels and compare CONSULT-II value with the speedometer
indication.Almost the same speed as the
speedometer indication
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1720
1720Vehicle speed sensor
(TCM output)A difference between two vehicle speed sig-
nals is out of the specified range.

Harness or connectors
(Secondary speed sensor circuit is open or
shorted)

Harness or connectors
(Wheel sensor circuit is open or shorted.)

TCM

Secondary speed sensor

ABS actuator and electric unit (control unit)

Wheel sensor

Unified meter and A/C amp.
PBIB2673E

DTC P1720 VSS
EC-625
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WITHOUT CONSULT-II
1. Start engine.
2. Drive vehicle at a speed of 20 km/h (12 MPH) or more for at least 5 seconds without brake pedal depress-
ing.
3. Stop the vehicle.
4. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
5. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
6. If 1st trip DTC is detected, go to EC-625, "
Diagnostic Procedure" .
Diagnostic ProcedureBBS005KT
1. CHECK DTC WITH TCM
Check DTC with TCM. Refer to CVT-24, "
TROUBLE DIAGNOSIS" .
OK or NG
OK >> GO TO 2.
NG >> Perform trouble shooting relevant to DTC indicated.
2. CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Refer to BRC-44, "
TROUBLE DIAGNOSIS" .
OK or NG
OK >> GO TO 3.
NG >> Perform trouble shooting relevant to DTC indicated.
3. CHECK “UNIFIED METER AND A/C AMP.”
Check “unified meter and A/C amp.” function.
Refer to DI-27, "
UNIFIED METER AND A/C AMP" .
>>INSPECTION END

EC-626
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DTC P1805 BRAKE SWITCH

DTC P1805 BRAKE SWITCHPFP:25320
DescriptionBBS00544
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.
CONSULT-II Reference Value in Data Monitor ModeBBS00545
Specification data are reference values.
On Board Diagnosis LogicBBS00546
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
DTC Confirmation ProcedureBBS00547
WITH CONSULT-II
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT-II.
4. Select “DATA MONITOR” mode with CONSULT-II.
5. If 1st trip DTC is detected, go to EC-628, "
Diagnostic Procedure"
.
WITHOUT CONSULT-II
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the Diagnostic Test Mode II (Self-diagnostic results) memory. Refer to EC-378, "
How to Set Diag-
nostic Test Mode II (Self-diagnostic Results)" .
4. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
5. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
6. If DTC is detected, go to EC-628, "
Diagnostic Procedure" .
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW

Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1805
1805Brake switchA brake switch signal is not sent to ECM for
extremely long time while the vehicle is driving.

Harness or connectors
(Stop lamp switch circuit is open or
shorted.)

Stop lamp switch
Engine operating condition in fail-safe mode
ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.
Therefore, acceleration will be poor.
Vehicle condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
SEF058Y

EC-632
[VQ]
DTC P2122, P2123 APP SENSOR

DTC Confirmation ProcedureBBS0054E
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-634, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine and let it idle for 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
4. If DTC is detected, go to EC-634, "
Diagnostic Procedure" .
SEF058Y

DTC P2127, P2128 APP SENSOR
EC-639
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DTC Confirmation ProcedureBBS0054M
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-641, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine and let it idle for 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
4. If DTC is detected, go to EC-641, "
Diagnostic Procedure" .
SEF058Y

EC-646
[VQ]
DTC P2135 TP SENSOR

DTC Confirmation ProcedureBBS0054U
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 1 second.
4. If DTC is detected, go to EC-648, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine and let it idle for 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
4. If DTC is detected, go to EC-648, "
Diagnostic Procedure" .
SEF058Y