Nissan Altima HL32 Hybrid. Manual - part 709

U0131-433, U0131-434

HBC-585

< COMPONENT DIAGNOSIS >

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U0131-433, U0131-434

Description

INFOID:0000000004212184

The hybrid vehicle control ECU transmits and receives signals to and from the ECM, the brake ECU, the EPS

control unit and network gateway ECU via CAN communication.

DTC Logic

INFOID:0000000004212185

DTC DETECTION LOGIC

If the hybrid vehicle control ECU detects a problem with CAN communication between the ECU and the EPS

control unit, the hybrid vehicle control ECU will set a DTC.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC confirmation procedure has been previously conducted, always turn ignition switch OFF and wait at

least 10 seconds before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Go to 

HBC-585, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004212186

Go to 

LAN-53, "Trouble Diagnosis Flow Chart"

.

DTC No.

INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

U0131

433

Lost communication with EPS 
control module

Problem with CAN communication be-
tween the EPS control unit and hybrid 
vehicle control ECU (communication er-
ror between ECUs)

CAN communication system

U0131

434

Problem with CAN communication be-
tween the EPS control unit and hybrid 
vehicle control ECU (signal transmission 
error)

HBC-586

< COMPONENT DIAGNOSIS >

U0424-537

U0424-537

Description

INFOID:0000000004212187

If there is a malfunction in the Auto Amp. (Automatic air conditioner system), DTC U0424-537 will be output.

DTC Logic

INFOID:0000000004212188

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC confirmation procedure has been previously conducted, always turn ignition switch OFF and wait at

least 10 seconds before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Go to 

HBC-586, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004212189

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 (AIR CONDITIONING SYSTEM)

1. Turn ignition switch ON.

2. Check DTC.
Air conditioning system DTCs are output

YES

>> Go to air conditioning system.

NO

>> Replace Auto Amp. (Automatic air conditioner system).

DTC No.

INF code

Trouble diagnosis name

DTC detecting condition

Possible cause

U0424

537

Invalid Data Received from 
HVAC Control Module

Auto Amp. (Automatic air conditioner 
system) malfunction

Auto Amp. (Automatic air conditioner 
system)

U1001-146, U1001-435U1001-594, U1001-827 U1001-919, U1001-920

HBC-587

< COMPONENT DIAGNOSIS >

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U1001-146, U1001-435U1001-594, U1001-827 U1001-919, U1001-920

Description

INFOID:0000000004212190

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Many elec-

tronic control units are equipped onto a vehicle, and each control unit shares information and links with other

control units during operation (not independent). In CAN communication, control units are connected with 2

communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.

Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000004212191

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC confirmation procedure has been previously conducted, always turn ignition switch OFF and wait at

least 10 seconds before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 3 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Go to 

HBC-588, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC No.

INF Code

Trouble diagnosis name

DTC detecting condition

Possible cause

U1001

146

Lost communication with BCM

When the hybrid vehicle control 
ECU is not transmitting or receiv-
ing CAN communication signal 
with BCM for 2 seconds or more.

CAN communication system

U1001

435

When the hybrid vehicle control 
ECU is not transmitting or receiv-
ing CAN communication signal 
with BCM for 2 seconds or more.

CAN communication system

U1001

919

Lost communication with IPDM 
E/R

When the hybrid vehicle control 
ECU is not transmitting or receiv-
ing CAN communication signal 
with IPDM E/R for 2 seconds or 
more.

CAN communication system

U1001

920

When the hybrid vehicle control 
ECU is not transmitting or receiv-
ing CAN communication signal 
with IPDM E/R for 2 seconds or 
more.

CAN communication system

U1001

594

Lost communication with con-
troller (Auto AMP.)

When the hybrid vehicle control 
ECU is not transmitting or receiv-
ing CAN communication signal 
with controller (Auto AMP.) for 2 
seconds or more.

CAN communication system

U1001

827

When the hybrid vehicle control 
ECU is not transmitting or receiv-
ing CAN communication signal 
with controller (Auto AMP.) for 2 
seconds or more.

CAN communication system

HBC-588

< COMPONENT DIAGNOSIS >

U1001-146, U1001-435U1001-594, U1001-827 U1001-919, U1001-920

Diagnosis Procedure

INFOID:0000000004212192

Go to 

LAN-16, "Trouble Diagnosis Flow Chart"

.