Nissan Altima HL32 Hybrid. Manual - part 683

P0AEE-276, P0AEE-277

HBC-481

< COMPONENT DIAGNOSIS >

D

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A

B

HBC

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13.

CHECK WATER PUMP WITH MOTOR & BRACKET ASSEMBLY

See 

HBC-362, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 14.

NG

>> GO TO 16.

14.

CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR & BRACKET ASSEMBLY - HY-

BRID VEHICLE CONTROL ECU)

See 

HBC-362, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 15.

NG

>> Repair or replace harness or connectors.

15.

CHECK HIGH VOLTAGE FUSE AND FUSIBLE LIMK BOX

See 

HBC-362, "Diagnosis Procedure"

.

OK or NG

OK

>> Replace hybrid vehicle control ECU.

NG

>> Repair or replace high voltage fuse and fusible link box.

16.

CHECK HARNESS AND CONNECTOR (WATER PUMP WITH MOTOR POWER SOURCE CIRCUIT)

See 

HBC-362, "Diagnosis Procedure"

.

OK or NG

OK

>> Replace water pump with motor & bracket assembly.

NG

>> Repair or replace harness or connector.

HBC-482

< COMPONENT DIAGNOSIS >

P0AEF-275, P0AF0-274

P0AEF-275, P0AF0-274

Description

INFOID:0000000004212080

The MG ECU located in the inverter with converter assembly detects the temperature of the motor inverter

using the temperature sensor built into the inverter with converter assembly. The inverter cooling system is the

same as that for MG2 and MG1, and it operates independently of the engine cooling system. The characteris-

tics of the motor inverter temperature sensor are the same as those of the boost converter temperature sen-

sor. The MG ECU uses the signal from the motor inverter temperature sensor to check the effectiveness of the

inverter cooling system. If necessary, the MG ECU will limit inverter output to prevent inverter overheating.

The MG ECU also detects a malfunction of the front motor inverter temperature sensor or its circuit.

DTC Logic

INFOID:0000000004212081

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000004212082

1.

PRECONDITIONING

• Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with

converter assembly, take safety precautions such as wearing insulated gloves and removing the service

plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent

other technicians from accidentally reconnecting it while you are working on the high-voltage system.

• After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage

connectors or terminals.

• Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with

converter assembly.

>> GO TO 2.

2.

REPLACE INVERTER WITH CONVERTER ASSEMBLY

>> COMPLETED

DTC No.

INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

P0AEF

275

Drive motor inverter tempera-
ture sensor “A” circuit low

Open or short to GND in the mo-
tor inverter temperature sensor 
circuit

Inverter with converter assembly

P0AF0

274

Drive motor inverter tempera-
ture sensor “A” circuit high

Short to +B in motor inverter tem-
perature sensor circuit

P1572-904

HBC-483

< COMPONENT DIAGNOSIS >

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P1572-904

Description

INFOID:0000000004212083

When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.

The hybrid vehicle control ECU detects the state of the brake pedal by this input of two kinds (ON/OFF signal).

Refer to 

HBC-66, "System Description"

 for the ASCD function.

DTC Logic

INFOID:0000000004212084

DTC DETECTION LOGIC

Component Function Check

INFOID:0000000004212085

1.

CHECK FOR ASCD BRAKE SWITCH FUNCTION

 With CONSULT-III

1. Turn ignition switch ON.

2. Select “ASCD CANSEL SW” in “DATA MONITOR” mode with CONSULT-III.

3. Check “ASCD CANSEL SW” indication under the following conditions.

 With GST

1. Turn ignition switch ON.

2. Check the voltage between hybrid vehicle control ECU harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

HBC-483, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004212086

1.

PRECONDITIONING

• Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with

converter assembly, take safety precautions such as wearing insulated gloves and removing the service

plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent

other technicians from accidentally reconnecting it while you are working on the high-voltage system.

• After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage

connectors or terminals.

• Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with

converter assembly.

DTC No.

INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

P1572

904

ASCD brake switch

ASCD brake switch signal is not 
sent to hybrid vehicle control ECU 
for extremely long time while the 
vehicle is driving.

• Harness or connectors

(ASCD brake switch circuit is open shorted.)

• ASCD brake switch
• Incorrect ASCD brake switch installation

Monitor item

Condition

Indication

ASCD CANSEL SW

Brake pedal

Slightly depressed

ON

Fully released

OFF

Hybrid vehicle control ECU

Ground

Condition

Voltage

Harness 

connector

Terminal

E66

118 (ASCD brake switch signal)

Ground

Brake pedal

Slightly depressed

Approx. 0V

Fully released

Battery voltage

HBC-484

< COMPONENT DIAGNOSIS >

P1572-904

>> GO TO 2.

2.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ASCD brake switch harness connector.

3. Turn ignition switch ON.

4. Check the voltage between ASCD brake switch harness con-

nector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E6

• 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 power in harness or connectors.

4.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect hybrid vehicle control ECU harness connector.

3. Check the continuity between ASCD brake switch harness connector and hybrid vehicle control ECU har-

ness connector.

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

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.

• Junction block connector E46, E50

• Harness for open or short between ASCD brake switch and hybrid vehicle control ECU

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

6.

CHECK ASCD BRAKE SWITCH

Refer to 

HBC-485, "Component Inspection (ASCD Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace ASCD brake switch.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

ASCD brake switch (A)

Ground

Voltage

Harness 

connector

Terminal

E39

1

Ground

Battery voltage

JMCIA0232ZZ

ASCD brake switch

Hybrid vehicle control ECU

Continuity

Harness

connector

Terminal

Harness

connector

Terminal

E39

2

E66

118 (STI

−)

Existed