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Nissan Altima L32. Manual - part 444

P1564 ASCD STEERING SWITCH

EC-897

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

2. Select “MAIN SW”, “CANCEL SW”, “RESUME/ACC SW” and “SET SW” in “DATA MONITOR” mode with

CONSULT-III.

3. Check each item indication under the following conditions.

Without CONSULT-III

1. Turn ignition switch ON.

2. Check the voltage between ECM harness connector and

ground.

Is the inspection result normal?

YES

>> GO TO 8.

>> GO TO 3.

CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Disconnect combination switch harness connector M88.

4. Check the continuity between combination switch and ECM harness connector.

5. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 5.

>> GO TO 4.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors M1, E30

• Combination switch (spiral cable)

• Harness for open and short between ECM and combination switch

Monitor item

Condition

Indication

MAIN SW

MAIN switch

Pressed

Released

OFF

CANCEL SW

CANCEL switch

Pressed

Released

OFF

RESUME/ACC SW RESUME/ACCELERATE switch

Pressed

Released

OFF

SET SW

SET/COAST switch

Pressed

Released

OFF

ECM

Ground

Condition

Voltage

Connector

Terminal

E10

(ASCD steering

switch signal)

Ground

MAIN switch: Pressed

Approx. 0V

CANCEL switch: Pressed

Approx. 1V

SET/COAST switch: Pressed Approx. 2V

RESUME/ACCELERATE
switch: Pressed

Approx. 3V

All ASCD steering switches:
Released

Approx. 4V

PBIB3600E

Combination switch

ECM

Continuity

Terminal

Connector Terminal

E10

Existed

EC-898

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

P1564 ASCD STEERING SWITCH

>> Repair open circuit or short to ground or short to power in harness or connectors.

CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check the continuity between ECM harness connector and combination switch.

2. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 7.

>> GO TO 6.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors M1, E30

• 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.

CHECK ASCD STEERING SWITCH

Refer to

EC-898, "Component Inspection"

Is the inspection result normal?

YES

>> GO TO 8.

>> Replace ASCD steering switch.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

>> INSPECTION END

Component Inspection

INFOID:0000000004349875

CHECK ASCD STEERING SWITCH

1. Disconnect combination switch (spiral cable) harness connector M303.

2. Check the continuity between combination switch harness con-

nector terminals under following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace ASCD steering switch

Combination switch

ECM

Continuity

Terminal

Connector Terminal

E10

Existed

Combination meter

Condition

Resistance

Con-

nector

Terminals

M88

13 and 16

MAIN switch: Pressed

Approx. 0

Ω

CANCEL switch: Pressed

Approx. 250

Ω

SET/COAST switch: Pressed

Approx. 660

Ω

RESUME/ACCELERATE switch: Pressed

Approx. 1,480

Ω

All ASCD steering switches: Released

Approx. 4,000

Ω

JMBIA1625ZZ

P1572 ASCD BRAKE SWITCH

EC-899

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

P1572 ASCD BRAKE SWITCH

Description

INFOID:0000000004349876

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 this input of two kinds (ON/OFF signal).

Refer to

EC-603, "System Description"

for the ASCD function.

DTC Logic

INFOID:0000000004349877

DTC DETECTION LOGIC

NOTE:

• If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer

EC-864, "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 OFF. And even when malfunction A is detected in two

consecutive trips, DTC is not stored in ECM memory.

DTC CONFIRMATION PROCEDURE

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.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A

With CONSULT-III

1. Start engine.

2. Select “DATA MONITOR” mode with CONSULT-III.

3. Press MAIN switch and make sure that CRUISE indicator is displayed in combination meter.

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.

DTC No.

Trouble diagnosis

name

DTC detecting condition

Possible cause

P1572

ASCD brake switch

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.)

• Harness or connectors

(The 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

ASCD brake switch signal is not sent to
ECM for extremely long time while the ve-
hicle is driving.

EC-900

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

P1572 ASCD BRAKE SWITCH

5. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?

YES

>> Go to

EC-900, "Diagnosis Procedure"

>> GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B

With CONSULT-III

1. 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.

2. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?

YES

>> Go to

EC-900, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004349878

CHECK OVERALL FUNCTION-I

With CONSULT-III

1. Turn ignition switch ON.

2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.

3. Check “BRAKE SW1” indication under the following conditions.

Without CONSULT-III

1. Turn ignition switch ON.

2. Check the voltage between ECM harness connector and

ground.

VHCL SPEED SE

More than 30 km/h (19 mph)

Shift lever

Suitable position

VHCL SPEED SE

More than 30 km/h (19 mph)

Selector lever

Suitable position

Driving location

Depress the brake pedal for more than
five seconds so as not to come off from
the above-mentioned vehicle speed.

Monitor item

Condition

Indication

BRAKE SW1

Brake pedal (CVT)
Brake pedal and clutch pedal (M/T)

Slightly depressed

OFF

Fully released

ECM

Grou

Condition

Voltage

Con-

nector

Terminal

E10

110

(ASCD brake

switch signal)

Grou

Brake pedal (CVT)
Brake pedal and
clutch pedal (M/T)

Slightly
depressed

Approx. 0V

Fully re-
leased

Battery voltage

JMBIA1605ZZ

Content .. 442 443 444 445 ..