Nissan Altima HL32 Hybrid. Manual - part 653

 

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Nissan Altima HL32 Hybrid. Manual - part 653

 

 

P0A92-521

HBC-361

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

NG

>> Replace hybrid transaxle (See 

TM-36, "Removal and Installation"

).

HBC-362

< COMPONENT DIAGNOSIS >

P0A93-346

P0A93-346

Description

INFOID:0000000004211999

The inverter converts the boosted high-voltage direct-current from the HV battery into alternating current for

MG2 and MG1. The inverter generates heat during the conversion process, and this heat could damage the

inverter if a inverter cooling system is unavailable. Therefore, similar to MG2 and MG1, the inverter is cooled

by a special inverter cooling system consisting of an electric water pump, cooling fan, and sub radiator. This

inverter cooling system is independent of the engine cooling system. The hybrid vehicle control ECU monitors

the electric water pump, cooling fan, and inverter cooling system, and detects malfunctions.

DTC Logic

INFOID:0000000004212000

DTC DETECTION LOGIC

If the hybrid vehicle control ECU detects a malfunction of the electric water pump, fan or sub radiator, the ECU

will illuminate the MIL and set a DTC.

Diagnosis Procedure

INFOID:0000000004212001

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.

CHECK DTC OUTPUT (HYBRID SYSTEM)

1. Turn ignition switch ON.

2. Check DTC.

Is DTC detected?

YES

>> Go to Diagnosis Procedure relevant to output DTC.

NO

>> GO TO 3.

3.

CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CON-

NECTOR)
See 

HBC-109, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 4.

DTC No.

INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

P0A93

346

Inverter Cooling System 
Performance

Inverter cooling system malfunction 
(Inverter coolant malfunction)

• Wire harness or connector
• Inverter cooling system
• Water pump with motor & bracket 

assembly

• Hybrid vehicle control ECU
• Inverter with converter assembly
• Cooling fan system

DTC No.

Relevant Diagnosis

P0A02-719, P0A03-720

Inverter coolant temperature circuit

P0A1D (all INF code)

Hybrid Powertrain Control Module

P0A1B (all INF code)

Drive Motor “A” Control Module

P0A93-346

HBC-363

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

NG

>> Connect securely.

4.

CHECK QUANTITY OF INVERTER COOLANT

1. Check for coolant leaks.

2. Check the coolant in the sub reserve tank assembly is above the low level.

NOTE:

After repairing the coolant leaks and adding coolant, perform the “INV WATER PUMP” and “COOLING

FAN SPD” in “ACTIVE TEST” mode with CONSULT-III and make sure that there are no malfunctions.

A or B or C

A

>> GO TO 5.

B

>> Add coolant.

C

>> Check for coolant leaks and add coolant.

5.

CHECK COOLANT HOSE

Check if the hoses of the inverter cooling system are kinked or clogged.

OK or NG

OK

>> GO TO 6.

NG

>> Correct the problem.

6.

CHECK FUSE

1. Turn ignition switch OFF.

2. Remove the 10A fuse (No. 67).

3. Check the resistance of the fuse.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace fuse.

7.

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

See 

HBC-109, "Diagnosis Procedure"

.

Result

Proceed to

Coolant leaks are not evident. The coolant level in the sub reserve tank assembly is above the low level.

A

Coolant leaks are not evident. The coolant level in the sub reserve tank assembly is below the low level.

B

Coolant leaks are evident.

C

1

Coolant reservoir

2.

Water pump with motor and bracket 
assembly

ALCIA0018ZZ

Resistance: Below 1 

HBC-364

< COMPONENT DIAGNOSIS >

P0A93-346

OK or NG

OK

>> GO TO 8.

NG

>> Connect securely.

8.

CHECK CONNECTOR CONNECTION CONDITION (WATER PUMP WITH MOTOR & BRACKET ASSEM-

BLY CONNECTOR)
Check the connection of the water pump with motor & bracket assembly connector.

OK or NG

OK

>> GO TO 9.

NG

>> Connect securely.

9.

PERFORM ACTIVE TEST WITH CONSULT-III (INV WATER PUMP)

1. Reconnect all harness connectors removed.

2. Turn ignition switch ON.

3. Perform “INV WATER PUMP” in “ACTIVE TEST” mode with CONSULT-III.

4. During this test, open the sub reserve tank cap and check that there are ripples in the coolant. Continue

the active test for at least 1 minute.

NOTE:

The water pump motor operates even in inspection mode.

There are ripples in the coolant in the sub reserve tank assembly for 1 minute.

OK

>> GO TO 10.

NG

>> GO TO 13.

10.

CHECK CONNECTOR CONNECTION CONDITION (COOLING FAN MOTOR CONNECTOR)

Check the connections of the cooling fan motor connectors.

OK or NG

OK

>> GO TO 11.

NG

>> Connect securely.

11.

PERFORM ACTIVE TEST WITH CONSULT-III (COOLING FAN SPD)

1. Turn ignition switch ON.

2. Perform “COOLING FAN SPD” in “ACTIVE TEST” mode with CONSULT-III.

OK or NG

OK

>> GO TO 12.

NG

>> Check cooling fan system (See 

EC-382, "Component Function Check"

).

12.

READ VALUE OF DATA MONITOR

1. Stop the engine and leave the vehicle for at least 1 hour.

2. Turn ignition switch ON.

3. Select “INV COOLANT TMP”, “CONVERTER TEMP”, “MG1 INV TEMP”, “MG2 INV TEMP” in “DATA

MONITOR” mode with CONSULT-III.

4. Read their indications.

NOTE:

The lower limit temperature that can be displayed for “MG2 INV TEMP”, “CONVERTER TEMP”, and

“MG1 INV TEMP” is 15

°C (59°F). The lower limit temperature for “INV COOLANT TMP” is -40°C (-40°F).

The “INV COOLANT TMP” value displayed on CONSULT-III may be lower than the others, but this is not

a malfunction.

OK or NG

The connector is connected securely and there are no contact problems.

The connectors are connected securely and there are no contact problems.

The cooling fan rotates.

The displayed INV COOLANT TMP value is at least 20

°C (68°F) higher 

than MG2 INV TEMP, CONVERTER TEMP, and MG 1 INV TEMP.

 

 

 

 

 

 

 

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