2008 NISSAN TIIDA PN switch

DTC P1564 ASCD STEERING SWITCH
EC-435
< SERVICE INFORMATION >
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Diagnosis ProcedureINFOID:0000000001702956
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body.
Refer to EC-142, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON.
2. Select “MAIN SW”, “RESUME/ACC SW”, “SET SW and “CAN-
CEL SW” in “DATA MONITOR” mode with CONSULT-II.
3. Check each item indication under the following conditions.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
94 R ASCD steering switch[Ignition switch: ON]
• ASCD steering switch: OFFApproximately 4V
[Ignition switch: ON]
• MAIN switch: PressedApproximately 0V
[Ignition switch: ON]
• CANCEL switch: PressedApproximately 1V
[Ignition switch: ON]
• RESUME/ACCELERATE switch: PressedApproximately 3V
[Ignition switch: ON]
• SET/COAST switch: PressedApproximately 2V
95 B Sensor ground[Engine is running]
•Warm-up condition
• Idle speedApproximately 0V
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15
BBIA0698E
Switch Monitor item Condition Indication
MAIN switch MAIN SWPressed ON
Released OFF
CANCEL switch CANCEL SWPressed ON
Released OFF
SEC006D

EC-436
< SERVICE INFORMATION >
DTC P1564 ASCD STEERING SWITCH
Without CONSULT-II
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 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect combination switch harness connector M102.
3. Disconnect ECM harness connector.
4. Check harness continuity between combination 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 SIGNAL 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
switchRESUME/ACC SWPressed ON
Released OFF
SET/COAST
switchSET SWPressed ON
Released OFF Switch Monitor item Condition Indication
Switch Condition Voltage [V]
MAIN switchPressed Approx. 0
Released Approx. 4.0
CANCEL switchPressed Approx. 1.0
Released Approx. 4.0
RESUME/ACCELER-
AT E s w i t c hPressed Approx. 3.0
Released Approx. 4.0
SET/COAST switchPressed Approx. 2.0
Released Approx. 4.0
PBIB3343E
Continuity should exist.
Continuity should exist.

DTC P1564 ASCD STEERING SWITCH
EC-437
< SERVICE INFORMATION >
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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-437, "
Component Inspection".
OK or NG
OK >> GO TO 7.
NG >> Replace ASCD steering switch.
8.CHECK INTERMITTENT INCIDENT
Refer to EC-136
.
>>INSPECTION END
Component InspectionINFOID:0000000001702957
ASCD STEERING SWITCH
1. Disconnect combination switch (spiral cable) harness connector M102.
2. Check continuity between combination switch (spiral cable) ter-
minals 14 and 15 with pushing each switch.
If NG, replace ASCD steering switch.
Switch Condition Resistance [Ω]
MAIN switchPressed Approx. 0
Released Approx. 4,000
CANCEL switchPressed Approx. 250
Released Approx. 4,000
RESUME/ACCELERATE
switchPressed Approx. 1,480
Released Approx. 4,000
SET/COAST switchPressed Approx. 660
Released Approx. 4,000
PBIB2549E

EC-438
< SERVICE INFORMATION >
DTC P1572 ASCD BRAKE SWITCH
DTC P1572 ASCD BRAKE SWITCH
Component DescriptionINFOID:0000000001702958
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-28
for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000001702959
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001702960
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
•If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-397
.
•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 malfunction A is detected in two
consecutive trips, DTC is not stored in ECM memory.
BBIA0708E
MONITOR ITEM CONDITION SPECIFICATION
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
NameDTC Detecting Condition Possible Cause
P1572
1572ASCD brake switchA)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

DTC P1572 ASCD BRAKE SWITCH
EC-439
< SERVICE INFORMATION >
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DTC Confirmation ProcedureINFOID:0000000001702961
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 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.
WITH CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Press MAIN 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-441, "
Diagnosis 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-441, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-II” above.
VHCL SPEED SE More than 30 km/h (19 MPH)
Shift lever Suitable position
VHCL SPEED SE More than 30 km/h (19 MPH)
Shift lever Suitable position
Driving locationDepress the brake pedal for more than 5
seconds so as not to come off from the
above-mentioned vehicle speed.
PBIB2386E

EC-440
< SERVICE INFORMATION >
DTC P1572 ASCD BRAKE SWITCH
Wiring Diagram
INFOID:0000000001702962
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
BBWA2665E

DTC P1572 ASCD BRAKE SWITCH
EC-441
< SERVICE INFORMATION >
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Diagnosis ProcedureINFOID:0000000001702963
1.CHECK OVERALL FUNCTION-I
With CONSULT-II
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CON-
SULT-II.
3. Check “BRAKE SW1” indication under the following conditions.
M/T models
A/T and CVT models
Without CONSULT-II
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-II
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
99 R Stop lamp switch[Ignition switch: ON]
• Brake pedal: Fully releasedApproximately 0V
[Ignition switch: ON]
• Brake pedal: Slightly depressedBATTERY VOLTAGE
(11 - 14V)
100 G ASCD brake switch• Brake pedal: Slightly depressed (A/T, CVT)
• Brake pedal and clutch pedal: Fully released
(M/T) Approximately 0V
• Brake pedal: Slightly depressed (A/T, CVT)
• Brake pedal and/or clutch pedal: Slightly de-
pressed (M/T)BATTERY VOLTAGE
(11 - 14V)
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 0V
Clutch pedal and brake pedal: Fully released Battery voltage
CONDITION VOLTAGE
Brake pedal: Slightly depressed Approximately 0V
Brake pedal: Fully released Battery voltage
SEC011D
PBIB3315E

EC-442
< SERVICE INFORMATION >
DTC P1572 ASCD BRAKE SWITCH
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
Without CONSULT-II
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 with CONSULT-II 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
SEC013D
CONDITION VOLTAGE
Brake pedal: Fully released Approximately 0V
Brake pedal: Slightly depressed Battery voltage
PBIB0311E
BBIA0709E
Voltage: Battery voltage
PBIB0857E