Nissan Altima HL32 Hybrid. Manual - part 341

 

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Nissan Altima HL32 Hybrid. Manual - part 341

 

 

EC-348

< COMPONENT DIAGNOSIS >

[QR25DE]

P1572 ASCD BRAKE SWITCH

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.

• Junction block connector E45, E46

• Harness for open or short between ASCD brake switch and ECM

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

7.

CHECK ASCD BRAKE SWITCH

Refer to 

EC-349, "Component Inspection (ASCD Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Replace ASCD brake switch.

8.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect stop lamp switch harness connector.

3. Check the voltage between stop lamp switch harness connector

and ground.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E6

• 10A fuse (No.7)

• Harness for open or short between stop lamp switch and battery

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

10.

CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.

2. Check the continuity between ECM harness connector and stop lamp switch harness connector.

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

YES

>> GO TO 12.

NO

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E6

• Harness for open or short between ECM and stop lamp switch

Stop lamp switch

Ground

Voltage

Connector

Terminal

E38

1

Ground

Battery voltage

JMBIA1639ZZ

ECM

ASCD clutch switch

Continuity

Connector

Terminal

Connector

Terminal

E10

106

E38

2

Existed

P1572 ASCD BRAKE SWITCH

EC-349

< COMPONENT DIAGNOSIS >

[QR25DE]

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EC

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O

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

12.

CHECK STOP LAMP SWITCH

Refer to 

EC-349, "Component Inspection (Stop Lamp Switch)"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Replace stop lamp switch.

13.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (ASCD Brake Switch)

INFOID:0000000004211591

1.

CHECK ASCD BRAKE SWITCH-I

1. Turn ignition switch OFF.

2. Disconnect ASCD brake switch harness connector.

3. Check the continuity between ASCD brake switch terminals

under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK ASCD BRAKE SWITCH-II

1. Adjust ASCD brake switch installation. Refer to 

BR-12, "Inspection and Adjustment"

.

2. Check the continuity between ASCD brake switch terminals

under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ASCD brake switch.

Component Inspection (Stop Lamp Switch)

INFOID:0000000004211592

1.

CHECK STOP LAMP SWITCH-I

1. Turn ignition switch OFF.

2. Disconnect stop lamp switch harness connector.

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

SEC023D

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

SEC023D

EC-350

< COMPONENT DIAGNOSIS >

[QR25DE]

P1572 ASCD BRAKE SWITCH

3. Check the continuity between stop lamp switch terminals under

the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK STOP LAMP SWITCH-II

1. Adjust stop lamp switch installation. Refer to 

BR-12, "Inspection and Adjustment"

.

2. Check the continuity between stop lamp switch terminals under

the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace stop lamp switch.

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Not existed

Slightly depressed

Existed

JMBIA1640ZZ

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Not existed

Slightly depressed

Existed

JMBIA1640ZZ

P1574 ASCD VEHICLE SPEED SENSOR

EC-351

< COMPONENT DIAGNOSIS >

[QR25DE]

C

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P1574 ASCD VEHICLE SPEED SENSOR

Description

INFOID:0000000004211593

The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from hybrid

vehicle ECU, and the other is from brake ECU. The ECM uses these signals for ASCD control. Refer to 

EC-

45, "System Description"

 for ASCD functions.

DTC Logic

INFOID:0000000004211594

DTC DETECTION LOGIC

NOTE:

• If DTC P1574 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

• If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer

to 

EC-310, "DTC Logic"

.

• If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer

to 

EC-318, "DTC Logic"

.

• If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to 

EC-318, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If this test

is conducted with the drive wheels lifted, activate “INPSECTION MODE 1” (

HBC-104

). If a road test is

expected to be easier, it is unnecessary to lift up the vehicle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON (READY).

2. Drive the vehicle at more than 40 km/h (25 MPH).

CAUTION:

Always drive vehicle at a safe speed.

3. Check DTC.
Is DTC detected?

YES

>> Go to 

EC-351, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004211595

1.

CHECK DTC WITH HYBRID VEHICLE CONTROL ECU

Refer to 

HBC-619, "DTC Index"

.

Is the inspection result normal?

YES

>> GO TO 2.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1574

ASCD vehicle speed 
sensor

ECM 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.)

• Hybrid vehicle control ECU
• Brake  ECU

 

 

 

 

 

 

 

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