NISSAN LATIO 2010 Service Repair Manual

EC-926
< SERVICE INFORMATION >[MR18DE]
DTC P1564 ASCD STEERING SWITCH
DTC Confirmation Procedure
INFOID:0000000005532799
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.
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.
7. If DTC is detected, go to EC-928, "
Diagnosis Procedure".
Revision: January 20102010 Versa

DTC P1564 ASCD STEERING SWITCHEC-927
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Wiring DiagramINFOID:0000000005532800
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
ABBWA0362GB
Revision: January 20102010 Versa

EC-928
< SERVICE INFORMATION >[MR18DE]
DTC P1564 ASCD STEERING SWITCH
Diagnosis Procedure
INFOID:0000000005532801
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-638, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch ON.
2. Select “MAIN SW”, “RESUME/ACC SW”, “SET SW and “CANCEL SW” in “DATA MONITOR” mode with
CONSULT-III.
3. Check each item indication under the following conditions.
TERMI-
NAL NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
94 R ASCD steering switch [Ignition switch: ON]
• ASCD steering switch: OFF
Approximately 4 V
[Ignition switch: ON]
• MAIN switch: Pressed Approximately 0 V
[Ignition switch: ON]
• CANCEL switch: Pressed Approximately 1 V
[Ignition switch: ON]
• RESUME/ACCELERATE switch: Pressed Approximately 3 V
[Ignition switch: ON]
• SET/COAST switch: Pressed Approximately 2 V
95 B Sensor ground [Engine is running]
•
Warm-up condition
• Idle speed Approximately 0 V
:
Vehicle front
1. Body ground E24 2. Engine ground F93. Engine ground F16
4. Body ground E15
BBIA0698E
Switch Monitor item Condition Indication
MAIN switch MAIN SW Pressed
ON
Released OFF
CANCEL switch CANCEL SW Pressed
ON
Released OFF
Revision: January 20102010 Versa

DTC P1564 ASCD STEERING SWITCHEC-929
< SERVICE INFORMATION > [MR18DE]
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Without CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 94 and ground with press- ing each button.
OK or NG
OK >> GO TO 8.
NG >> GO TO 3.
3.CHECK ASCD STEERING SWITCH GRO UND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect combination switch harness connector M31.
3. Disconnect ECM harness connector.
4. Check harness continuity between combinati on switch terminal 15 and ECM terminal 95.
Refer to Wiring Diagram.
5. Also check harness for short to ground or short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK ASCD STEERING SWITCH INPUT S IGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 94 and combination switch terminal 14. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
RESUME/AC-
CELERATE
switch RESUME/ACC SW
Pressed
ON
Released OFF
SET/COAST
switch SET SW Pressed
ON
Released OFF
Switch
Monitor item Condition Indication
Switch Condition Voltage (V)
MAIN switch Pressed
Approx. 0
Released Approx. 4.0
CANCEL switch Pressed
Approx. 1.0
Released Approx. 4.0
RESUME/ACCELER-
ATE switch Pressed
Approx. 3.0
Released Approx. 4.0
SET/COAST switch Pressed
Approx. 2.0
Released Approx. 4.0
PBIB3343E
Continuity should exist.
Continuity should exist.
Revision: January 20102010 Versa

EC-930
< SERVICE INFORMATION >[MR18DE]
DTC P1564 ASCD STEERING SWITCH
OK >> GO TO 7.
NG >> GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M69, E7
• Combination switch (spiral cable)
• Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK ASCD STEERING SWITCH
Refer to EC-930, "
Component Inspection".
OK or NG
OK >> GO TO 8.
NG >> Replace ASCD steering switch.
8.CHECK INTERMITTENT INCIDENT
Refer to EC-632
.
>> INSPECTION END
Component InspectionINFOID:0000000005532802
ASCD STEERING SWITCH
1. Disconnect combination switch (spiral cable) harness connector M31.
2. Check continuity between combination switch (spiral cable) ter-
minals 14 and 15 with pushing each switch.
If NG, replace ASCD steering switch.
Switch ConditionResistance (Ω)
MAIN switch Pressed
Approx. 0
Released Approx. 4,000
CANCEL switch Pressed
Approx. 250
Released Approx. 4,000
RESUME/ACCELERATE
switch Pressed
Approx. 1,480
Released Approx. 4,000
SET/COAST switch Pressed
Approx. 660
Released Approx. 4,000
PBIB2549E
Revision: January 20102010 Versa

DTC P1572 ASCD BRAKE SWITCHEC-931
< SERVICE INFORMATION > [MR18DE]
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DTC P1572 ASCD BRAKE SWITCH
Component DescriptionINFOID:0000000005532803
When the brake pedal is depressed, ASCD brake switch (2) is
turned OFF and stop lamp switch (1) is turned ON. ECM detects the
state of the brake pedal by this
input of two kinds (ON/OFF signal).
Refer to EC-522
for the ASCD function.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005532804
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005532805
This self-diagnosis has the on e trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
• If DTC P1572 is displayed with DT C P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-893
.
• 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 OFF. And even when ma lfunction A is detected in two
consecutive trips, DTC is not stored in ECM memory.
BBIA0708E
Monitor item ConditionSpecification
BRAKE SW1
(ASCD brake switch) • Ignition switch: ON• Brake pedal: Fully released (A/T, CVT)
• Brake pedal and clutch pedal: Fully re-
leased (M/T) ON
• Brake pedal: Slightly depressed (A/T, CVT)
• Brake pedal and/or clutch pedal: Slight- ly depressed (M/T) OFF
BRAKE SW2
(Stop lamp switch) • Ignition switch: ONBrake pedal: Fully released
OFF
Brake pedal: Slightly depressed ON
DTC No.Trouble diagnosis
name DTC detecting condition
Possible cause
P1572
1572 ASCD brake switch A)
When the vehicle speed is above 30km/h (19
MPH), ON signals from the stop lamp switch
and the ASCD brake switch are sent to ECM
at the same time. • Harness or connectors
(Stop lamp switch circuit is shorted.)
• Harness or connectors (ASCD brake switch circuit is shorted.)
• Harness or connectors
(ASCD clutch switch circuit is shorted.)
(M/T)
• Stop lamp switch
• ASCD brake switch
• ASCD clutch switch (M/T)
• Incorrect stop lamp switch installation
• Incorrect ASCD brake switch installation
• Incorrect ASCD clutch switch installation (M/T)
•ECM
B)
ASCD brake switch signal is not sent to ECM
for extremely long time while the vehicle is
driving
Revision: January 20102010 Versa

EC-932
< SERVICE INFORMATION >[MR18DE]
DTC P1572 ASCD BRAKE SWITCH
DTC Confirmation Procedure
INFOID:0000000005532806
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.
TESTING CONDITION:
Steps 3 and 6 may be conducted with the drive wheels li fted 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-III
1. Start engine.
2. Press MAIN switch and make sure that CRUISE indicator lights up.
3. Drive the vehicle for at least 5 consecutive seconds under the following condition.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to EC-934, "
Diagnosis Procedure".
If 1st trip DTC is not detec ted, go to the following step.
6. Drive the vehicle for at least 5 consecutive seconds under the following condition.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to EC-934, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III” above.
Vehicle speed More than 30 km/h (19 MPH)
Shift lever Suitable position
Vehicle speed More than 30 km/h (19 MPH)
Shift lever Suitable position
Driving location Depress the brake pedal for more than 5
seconds so as not to come off from the
above-mentioned vehicle speed.
Revision: January 20102010 Versa

DTC P1572 ASCD BRAKE SWITCHEC-933
< SERVICE INFORMATION > [MR18DE]
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Wiring DiagramINFOID:0000000005532807
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
ABBWA0429GB
Revision: January 20102010 Versa

EC-934
< SERVICE INFORMATION >[MR18DE]
DTC P1572 ASCD BRAKE SWITCH
Diagnosis Procedure
INFOID:0000000005532808
1.CHECK OVERALL FUNCTION-I
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DAT A MONITOR” mode with CONSULT-III.
3. Check “BRAKE SW1” indication under the following conditions.
M/T models
A/T and CVT models
Without CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 100 and ground under the
following conditions.
M/T models
A/T and CVT models
OK or NG
OK >> GO TO 2.
NG (M/T models) >>GO TO 3.
NG (A/T and CVT models) >>GO TO 4.
2.CHECK OVERALL FUNCTION-II
With CONSULT-III
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
TERMI-
NAL NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
99 R Stop lamp switch [Ignition switch: ON]
• Brake pedal: Fully released
Approximately 0 V
[Ignition switch: ON]
• Brake pedal: Slightly depressed BATTERY VOLTAGE
(11 - 14 V)
100 G ASCD brake switch • Brake pedal: Slightly depressed (A/T, CVT)
• Brake pedal and/or clutch pedal: Slightly de-
pressed (M/T) Approximately 0 V
• Brake pedal: Fully released (A/T, CVT)
• Brake pedal and clutch pedal: Fully released (M/T) BATTERY VOLTAGE
(11 - 14 V)
Condition Indication
Clutch pedal and/or brake pedal: Slightly depressed OFF
Clutch pedal and brake pedal: Fully released ON
Condition Indication
Brake pedal: Slightly depressed OFF
Brake pedal: Fully released ON
Condition Voltage
Clutch pedal and/or brake pedal: Slightly depressed Approximately 0 V
Clutch pedal and brake pedal: Fully released Battery voltage
Condition Voltage
Brake pedal: Slightly depressed Approximately 0 V
Brake pedal: Fully released Battery voltage
PBIB3315E
Revision: January 20102010 Versa

DTC P1572 ASCD BRAKE SWITCHEC-935
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Without CONSULT-III
Check voltage between ECM terminal 99 and ground under the fol-
lowing conditions.
OK or NG
OK >> GO TO 15.
NG >> GO TO 11.
3.CHECK ASCD CLUTCH SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD clutch switch (1) harness connector.
- Clutch pedal (2)
3. Turn ignition switch ON.
4. Check voltage between ASCD clutch switch terminal 1 and ground under the following conditions with CONSULT-III or
tester.
OK or NG
OK >> GO TO 9.
NG >> GO TO 4.
4.CHECK ASCD BRAKE SWITCH POWER SUPPLY
1. Turn ignition switch OFF.
Condition Indication
Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
ConditionVoltage
Brake pedal: Fully released Approximately 0 V
Brake pedal: Slightly depressed Battery voltage
PBIB0311E
BBIA0709E
ConditionVoltage
Brake pedal: Fully released Battery voltage
Brake pedal: Slightly depressed Approx. 0 V
PBIB0857E
Revision: January 20102010 Versa