Nissan Altima HL32 Hybrid. Manual - part 606

P0A1B-168, P0A1B-795, P0A1B-796

HBC-173

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

NOTE:

Turning ignition switch ON with the inverter with converter assembly connector disconnected causes other

DTCs to be stored. Clear the DTCs after performing this inspection.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace harness or connector.

6.

CHECK MOTOR RESOLVER

1. Turn ignition switch OFF.

2. Measure the resistance according to the value(s) in the table below.

Check for open

3. Measure the resistance according to the value(s) in the table below.

Check for short

OK or NG

OK

>> Replace inverter with converter assembly (See 

HBC-638, "Removal and Installation"

).

Inverter with converter assem-

bly (A)

Inverter with converter assem-

bly (A)

Resistance

Harness

connector

Terminal

Harness

connector

Terminal

F79

53 (MRF)

F79

52 (MRFG)

5.8 to 11.8 

Ω

51 (MSN)

47 (MSNG)

11.7 to 17.7 

Ω

48 (MCS)

49 (MCSG)

11.7 to 17.7 

Ω

JMCIA0226GB

Inverter with converter assembly (A)

Ground

Resistance

Harness

connector

Terminal

F79

53 (MRF)

Ground

10 k

Ω or higher

52 (MRFG)

51 (MSN)

47 (MSNG)

48 (MCS)

49 (MCSG)

JMCIA0227GB

Inverter with converter assem-

bly (A)

Inverter with converter assem-

bly (A)

Resistance

Harness

connector

Terminal

Harness

connector

Terminal

F79

53 (MRF)

F79

51 (MSN)

10 k

Ω or high-

er

49 (MCSG)

48 (MCS)

47 (MSNG)

52 (MRFG)

51 (MSN)

49 (MCSG)

48 (MCS)

47 (MSNG)

51 (MSN)

48 (MCS)

49 (MCSG)

47 (MSNG)

48 (MCS)

47 (MSNG)

JMCIA0228GB

HBC-174

< COMPONENT DIAGNOSIS >

P0A1B-168, P0A1B-795, P0A1B-796

NG

>> GO TO 7.

7.

CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - MOTOR RESOLV-

ER)
1. Disconnect the motor generator No.2 harness connector F77.

2. Measure the resistance according to the value(s) in the table below.

Check for open

Check for short

Check for short

Inverter with converter assem-

bly

Motor generator No.2

Resistance

Harness

connector

Terminal

Harness

connector

Terminal

F79

53 (MRF)

F77

1 (MRF)

Below 1 

Ω

52 (MRFG)

4 (MRFG)

51 (MSN)

2 (MSN)

47 (MSNG)

5 (MSNG)

48 (MCS)

3 (MCS)

49 (MCSG)

6 (MCSG)

Inverter with converter assembly

Ground

Resistance

Harness

connector

Terminal

F79

53 (MRF)

Ground

10 k

Ω or higher

52 (MRFG)

51 (MSN)

47 (MSNG)

48 (MCS)

49 (MCSG)

Motor generator N0.2

Ground

Resistance

Harness

connector

Terminal

F77

1 (MRF)

Ground

10 k

Ω or higher

4 (MRFG)

2 (MSN)

5 (MSNG)

3 (MCS)

6 (MCSG)

P0A1B-168, P0A1B-795, P0A1B-796

HBC-175

< COMPONENT DIAGNOSIS >

D

E

F

G

H

I

J

K

L

M

A

B

HBC

N

O

P

NOTE:

The generator resolver is not available separately. If it requires replacement, replace the hybrid transaxle.

OK or NG

OK

>> Replace hybrid transaxle (See 

TM-36, "Removal and Installation"

).

NG

>> Repair or replace harness or connector.

Inverter with converter assem-

bly

Inverter with converter assem-

bly

Resistance

Harness

connector

Terminal

Harness

connector

Terminal

F79

53 (MRF)

F79

52 (MRFG)

10 k

Ω or high-

er

51 (MSN)

47 (MSNG)

48 (MCS)

49 (MCSG)

53 (MRF)

51 (MSN)

53 (MRF)

49 (MCSG)

53 (MRF)

48 (MCS)

53 (MRF)

47 (MSNG)

52 (MRFG)

51 (MSN)

52 (MRFG)

49 (MCSG)

52 (MRFG)

48 (MCS)

52 (MRFG)

47 (MSNG)

51 (MSN)

48 (MCS)

51 (MSN)

49 (MCSG)

47 (MSNG)

48 (MCS)

47 (MSNG)

49 (MCSG)

HBC-176

< COMPONENT DIAGNOSIS >

P0A1B-511, P0A1B-512, P0A1B-661, P0A1B-786, P0A1B-794

P0A1B-511, P0A1B-512, P0A1B-661, P0A1B-786, P0A1B-794

Description

INFOID:0000000004211825

The inverter with converter assembly (MG ECU) monitors its internal operation and detects malfunctions.

DTC Logic

INFOID:0000000004211826

DTC DETECTION LOGIC

The MG ECU performs many diagnostic tests to verify proper operation of internal ECU systems. In one of

those diagnostics, the MG ECU checks the result of the motor CPU self-test. If the MG ECU detects a “Fail”

from the motor CPU self-test, it will conclude that there is an internal malfunction in the motor CPU.

The hybrid vehicle control ECU will illuminate the MIL and set a DTC.

Diagnosis Procedure

INFOID:0000000004211827

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

Refer to 

HBC-638, "Removal and Installation"

.

>> COMPLETED

DTC No.

INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

P0A1B

163

Drive Motor “A” Control 
Module

IPM positive power source error

Inverter with converter assembly 
(MG ECU)

P0A1B

164

IPM negative power source error

P0A1B

192

A/D error

P0A1B

193

ROM-RAM error

P0A1B

195

CPU recognition error

P0A1B

198

R/D converter NM stop error

P0A1B

511

Standard voltage for analog signal offset

P0A1B

512

Standard voltage for analog signal

P0A1B

661

Communication error (from MG2 to MG1)

P0A1B

786

ALU error

P0A1B

794

R/D converter communication error