2008 NISSAN TEANA Service Manual

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Page 1729 of 5121

NISSAN TEANA 2008 Service Manual EC-268
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P1554 BATTERY CURRENT SENSOR
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-268, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:

Page 1730 of 5121

NISSAN TEANA 2008 Service Manual P1554 BATTERY CURRENT SENSOR
EC-269
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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NO >> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHE

Page 1731 of 5121

NISSAN TEANA 2008 Service Manual EC-270
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P1564 ASCD STEERING SWITCH
P1564 ASCD STEERING SWITCH
DescriptionINFOID:0000000003856749
ASCD steering switch has variant values of electrical resistance

EC-270
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P1564 ASCD STEERING SWITCH
P1564 ASCD STEERING SWITCH
DescriptionINFOID:0000000003856749
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to EC-51, "
System Diagram" for the ASCD function.
DTC LogicINFOID:0000000003856750
DTC DETECTION LOGIC
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to
EC-240, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 10 seconds.
2. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
3. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
4. Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 sec-
onds.
5. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
6. Check DTC.
Is DTC detected?
YES >> Go to EC-270, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000003856751
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E38. Refer to Ground Inspection in GI-37, "
Circuit Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch ON.
2. Select “MAIN SW”, “CANCEL SW”, “RESUME/ACC SW” and “SET SW” in “DATA MONITOR” mode with
CONSULT-III.
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P1564 ASCD steering switch An excessively high voltage signal from the
ASCD steering switch is sent to ECM.
ECM detects that input signal from the
ASCD steering switch is out of the specified
range.
ECM detects that the ASCD steering switch
is stuck ON. Harness or connectors
(The switch circuit is open or shorted.)
ASCD steering switch
ECM

Page 1732 of 5121

NISSAN TEANA 2008 Service Manual P1564 ASCD STEERING SWITCH
EC-271
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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3. Check each item indication under the following conditions.
Without CONSULT-III
1. Turn ign

Page 1733 of 5121

NISSAN TEANA 2008 Service Manual EC-272
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P1564 ASCD STEERING SWITCH
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.

Page 1734 of 5121

NISSAN TEANA 2008 Service Manual P1572 ASCD BRAKE SWITCH
EC-273
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P1572 ASCD BRAKE SWITCH
DescriptionINFOID:0000000003856753
When the brake pedal is depressed, ASC

P1572 ASCD BRAKE SWITCH
EC-273
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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P1572 ASCD BRAKE SWITCH
DescriptionINFOID:0000000003856753
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by two kinds of input (ON/OFF signal).
Refer to EC-51, "
System Diagram" for the ASCD function.
DTC LogicINFOID:0000000003856754
DTC DETECTION LOGIC
NOTE:
If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-240, "
DTC Logic".
This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not
stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when ignition switch is turned OFF. And even when malfunction A is detected
in two consecutive trips, DTC is not stored in ECM memory.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
NOTE:
Procedure for malfunction B is not described here. It takes extremely long time to complete procedure for mal-
function B. By performing procedure for malfunction A, the incident that causes malfunction B can be
detected.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Start engine (VDC switch OFF).
2. Select “DATA MONITOR” mode with CONSULT-III.
3. Press MAIN switch and check that CRUISE lamp illuminates.
4. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure 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.
5. Check 1st trip DTC.
With GST
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P1572 ASCD brake switchA)When the vehicle speed is above 30 km/h
(19 MPH), ON signals from the stop lamp
switch and the ASCD brake switch are sent
to the ECM at the same time. Harness or connectors
(The stop lamp switch circuit is shorted.)
Harness or connectors
(The ASCD brake switch circuit is shorted.)
Stop lamp switch
ASCD brake switch
Incorrect stop lamp switch installation
Incorrect ASCD brake switch installation
ECM B)ASCD brake switch signal is not sent to
ECM for extremely long time while the ve-
hicle is being driver.
VHCL SPEED SE More than 30 km/h (19 mph)
Selector lever Suitable position

Page 1735 of 5121

NISSAN TEANA 2008 Service Manual EC-274
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P1572 ASCD BRAKE SWITCH
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES >> Go to EC-274, "Diagnosis Procedure".
NO >> GO

Page 1736 of 5121

NISSAN TEANA 2008 Service Manual P1572 ASCD BRAKE SWITCH
EC-275
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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Without CONSULT-III
Check the voltage between ECM harness connector and ground.
Is the inspectio

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