Nissan Altima L32. Manual - part 989

PCS-20

< COMPONENT DIAGNOSIS >

[IPDM E/R]

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000004202410

Refer to 

LAN-7, "System Description"

.

DTC Logic

INFOID:0000000004202411

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

Diagnosis Procedure

INFOID:0000000004202412

1.

 PERFORM SELF DIAGNOSTIC

1. Turn ignition switch ON and wait for 2 second or more.

2. Check “Self Diagnostic Result” of IPDM E/R.
Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

PCS-20, "DTC Logic"

.

NO

>> Refer to 

GI-42, "Intermittent Incident"

.

DTC

CONSULT-III display 

description

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

When IPDM E/R cannot communicate CAN 
communication signal continuously for 2 
seconds or more

In CAN communication system, any item (or items) 
of the following listed below is malfunctioning.
• Transmission
• Receiving (ECM)
• Receiving (BCM)
• Receiving (Combination meter)

PCS

B2098 IGNITION RELAY ON STUCK

PCS-21

< COMPONENT DIAGNOSIS >

[IPDM E/R]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

B2098 IGNITION RELAY ON STUCK

Description

INFOID:0000000004202413

• IPDM E/R operates the ignition relay when it receives an ignition switch ON signal from BCM via CAN com-

munication.

• Turn the ignition relay OFF by pressing the push-button ignition switch once when the vehicle speed is 4 km/

h (2.5 MPH) or less.

• Turn the ignition relay OFF with the following operation when the vehicle speed is more than 4 km/h (2.5

MPH) or when an abnormal condition occurs in CAN communication from the unified meter (Emergency

OFF)

- Press and hold the push-button ignition switch for 2 seconds or more.

- Press the push-button ignition switch 3 time within 1.5 seconds.

NOTE:

The ignition relay does not turn ON for 3 seconds after emergency OFF even if the push-button ignition switch

is pressed.

DTC Logic

INFOID:0000000004202414

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000004202415

1.

 PERFORM SELF DIAGNOSIS

1. Turn the ignition switch ON.

2. Erase “Self Diagnostic Result” of IPDM E/R.

3. Turn ignition switch OFF, and wait for 1 second or more. 

4. Turn the ignition switch ON. Check “Self Diagnostic Result” again.
Is “IGN RELAY ON” displayed?

YES

>> Replace IPDM E/R. Refer to 

PCS-48, "Removal and Installation"

.

NO

>> Refer to 

GI-42, "Intermittent Incident"

.

DTC

CONSULT-III dis-

play description

DTC Detection Condition

Possible causes

B2098

IGN RELAY ON

The ignition relay ON is detected for 1 second at ignition switch OFF
(CPU monitors the status at the contact and excitation coil circuits of 
the ignition relay inside it)

Ignition relay malfunction

PCS-22

< COMPONENT DIAGNOSIS >

[IPDM E/R]

B2099 IGNITION RELAY OFF STUCK

B2099 IGNITION RELAY OFF STUCK

Description

INFOID:0000000004202416

• IPDM E/R operates the ignition relay when it receives an ignition switch ON signal from BCM via CAN com-

munication.

• Turn the ignition relay OFF by pressing the push-button ignition switch once when the vehicle speed is 4 km/

h (2.5 MPH) or less.

• Turn the ignition relay OFF with the following operation when the vehicle speed is more than 4 km/h (2.5

MPH) or when an abnormal condition occurs in CAN communication from the unified meter (Emergency

OFF)

- Press and hold the push-button ignition switch for 2 seconds or more.

- Press the push-button ignition switch 3 time within 1.5 seconds.

NOTE:

The ignition relay does not turn ON for 3 seconds after emergency OFF even if the push-button ignition switch

is pressed.

DTC Logic

INFOID:0000000004202417

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000004202418

1.

 PERFORM SELF DIAGNOSIS

1. Turn the ignition switch ON.

2. Erase “Self Diagnostic Result”.

3. Turn ignition switch OFF.

4. Turn the ignition switch ON. Check “Self Diagnostic Result” again.
Is “IGN RELAY OFF” displayed?

YES

>> Replace IPDM E/R. Refer to 

PCS-48, "Removal and Installation"

.

NO

>> Refer to 

GI-42, "Intermittent Incident"

.

DTC

CONSULT-III dis-

play description

DTC Detection Condition

Possible causes

B2099

IGN RELAY OFF

The ignition relay OFF is detected for 1 second at ignition switch ON
(CPU monitors the status at the contact and excitation coil circuits of 
the ignition relay inside it)

Ignition relay malfunction

PCS

POWER SUPPLY AND GROUND CIRCUIT

PCS-23

< COMPONENT DIAGNOSIS >

[IPDM E/R]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000004202419

1.

 CHECK FUSES AND FUSIBLE LINK

Check that the following IPDM E/R fuses or fusible link are not blown.

Is the fuse blown?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit.

NO

>> GO TO 2

2.

 CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R connectors.

3. Check voltage between IPDM E/R harness connector and

ground.

Is the measurement value normal?

YES

>> GO TO 3

NO

>> Repair harness or connector.

3.

 CHECK GROUND CIRCUIT

Check continuity between IPDM E/R harness connectors and

ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair harness or connector.

Terminal No.

Signal name

Fuses and fusible link No.

1, 2

Battery power supply

B, D

—

42

43

Terminals

Voltage (V)

(Approx.)

(+)

(

−)

IPDM E/R

Connector

Terminal

Ground

E16

1

Battery voltage

2

ALCIA0033ZZ

IPDM E/R

Ground

Continuity

Connector

Terminal

A: E18

12

Yes

B: E17

41

ALCIA0034ZZ