Nissan Altima HL32 Hybrid. Manual - part 349

EC-380

< COMPONENT DIAGNOSIS >

[QR25DE]

ASCD BRAKE SWITCH

• Junction block connector E46, E48

• 10A fuse (No. 3)

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

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

3.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between ASCD brake switch harness connector and ECM harness connector.

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

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Junction block connector E45, E46

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

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

5.

CHECK ASCD BRAKE SWITCH

Refer to 

EC-380, "Component Inspection (ASCD Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace ASCD brake switch.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (ASCD Brake Switch)

INFOID:0000000004363302

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"

.

ASCD brake switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E37

2

E10

110

Existed

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

SEC023D

ASCD BRAKE SWITCH

EC-381

< COMPONENT DIAGNOSIS >

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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.

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

SEC023D

EC-382

< COMPONENT DIAGNOSIS >

[QR25DE]

COOLING FAN

COOLING FAN

Description

INFOID:0000000004211631

COOLING FAN CONTROL MODULE

Cooling fan control module receives ON/OFF pulse duty signal from IPDM E/R. Corresponding to this ON/OFF

pulse duty signal, cooling fan control module sends cooling fan motor operating voltage to cooling fan motor.

The revolution speed of cooling fan motor is controlled by duty cycle of the voltage.

COOLING FAN MOTOR

Cooling fan motor receives cooling fan motor operating voltage from cooling fan control module. The revolu-

tion speed of cooling fan motor is controlled by duty cycle of the voltage.

Component Function Check

INFOID:0000000004211632

1.

CHECK COOLING FAN FUNCTION

With CONSULT-III

1. Turn ignition switch ON.

2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT-III.

3. Make sure that cooling fan speed varies according to the percent.

Without CONSULT-III

1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to 

PCS-14, "Diagnosis

Description"

.

2. Make sure that cooling fan operates.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-382, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004211633

1.

CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-I

1. Turn ignition switch OFF.

2. Disconnect cooling fan control module harness connector E231.

3. Turn ignition switch ON.

4. Check the voltage between cooling fan control module harness

connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 7.

2.

CHECK COOLING FAN CONTROL MODULE GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check the continuity between cooling fan control module harness connector and ground.

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

YES

>> GO TO 3.

Cooling fan control module

Ground

Voltage

Connector

Terminal

E231

3

Ground

Battery voltage

JMBIA1644ZZ

Cooling fan control module

Ground

Continuity

Connector

Terminal

E231

1

Ground

Existed

COOLING FAN

EC-383

< COMPONENT DIAGNOSIS >

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NO

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

3.

CHECK IPDM E/R GROUND CIRCUIT

1. Disconnect IPDM E/R harness connectors E17, E18.

2. Check the continuity between IPDM E/R harness connector and ground.

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

YES

>> GO TO 4.

NO

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

4.

CHECK COOLING FAN CONTROL SIGNAL CIRCUIT

1. Disconnect IPDM E/R harness connector E201.

2. Check the continuity between IPDM E/R harness connector and cooling fan control module harness con-

nector.

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

YES

>> GO TO 5.

NO

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

5.

CHECK COOLING FAN CONTROL MODULE OUTPUT SIGNAL CIRCUIT

1. Reconnect all harness connectors disconnected.

2. Disconnect cooling fan control module harness connectors E232, E233.

3. Turn ignition switch ON.

4. Check the voltage between cooling fan control module harness

connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace cooling fan control module.

6.

CHECK COOLING FAN MOTORS -1 AND -2

Refer to 

EC-385, "Component Inspection (Cooling Fan Motor)"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace cooling fan motor.

7.

CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-II

1. Turn ignition switch OFF.

2. Disconnect cooling fan relay harness connector E82.

3. Turn ignition switch ON.

IPDM E/R

Ground

Continuity

Connector

Terminal

E18

12

Ground

Existed

E17

41

IPDM E/R

Cooling fan control module

Continuity

Connector

Terminal

Connector

Terminal

E201

97

E231

2

Existed

Cooling fan control module

Ground

Voltage

Connector

Terminal

E232 (A)

4

Ground

Battery voltage

E233 (B)

6

JMBIA1645ZZ