Nissan Quest E52. Manual - part 933

PCS

IPDM E/R

PCS-29

< WIRING DIAGRAM >

[IPDM E/R]

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JRMWE3340GB

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< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R]

U1000 CAN COMM CIRCUIT

DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000009652858

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, 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.
CAN Communication Signal Chart. Refer to 

LAN-32, "CAN COMMUNICATION SYSTEM : CAN Communica-

tion Signal Chart"

.

DTC Logic

INFOID:0000000009652859

DTC DETECTION LOGIC

Diagnosis Procedure

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1.

PERFORM SELF DIAGNOSTIC

1.

Turn ignition switch ON and wait 2 seconds or more.

2.

Check “Self Diagnostic Result” of “IPDM E/R” using CONSULT.

Is DTC “U1000” displayed?

YES

>> Refer to 

LAN-17, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-42, "Intermittent Incident"

.

DTC

CONSULT display de-

scription

DTC Detection Condition

Possible cause

U1000

CAN COMM CIRCUIT

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

CAN communication system

PCS

B2098 IGNITION RELAY ON STUCK

PCS-31

< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R]

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B2098 IGNITION RELAY ON STUCK

Description

INFOID:0000000009652861

• 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 and A/C
amp.(Emergency OFF)

- Press and hold the push-button ignition switch for 2 seconds or more.
- Press the push-button ignition switch 3 times 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:0000000009652862

DTC DETECTION LOGIC

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait 1 second or more.

3.

Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT.

Is DTC detected?

YES

>> Refer to 

PCS-31, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000009652863

1.

CHECK SELF DIAGNOSTIC RESULT

Check DTC using CONSULT.

What is the display history of DTC “B2098”?

“CRNT”>> GO TO 2.
“PAST” >> GO TO 5.

2.

CHECK IGNITION RELAY CONTROL CIRCUIT VOLTAGE 1

1.

Turn ignition switch ON

2.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK IGNITION RELAY CONTROL CIRCUIT VOLTAGE 2

1.

Disconnect IPDM E/R connector.

DTC

CONSULT display 

description

DTC Detection Condition

Possible causes

B2098

IGN RELAY ON 
CIRC

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

(+)

(–)

Voltage

(Approx.)

IPDM E/R

Connector

Terminal

E10

27

Ground

0 V

PCS-32

< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R]

B2098 IGNITION RELAY ON STUCK

2.

Turn ignition switch ON

3.

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

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-36, "Removal and Installation"

.

NO

>> Check the harness of the ignition relay control circuit for a short to power.

4.

CHECK IGNITION RELAY CONTROL CIRCUIT

1.

Disconnect IPDM E/R connector.

2.

Check continuity between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> Perform the diagnosis procedure for DTC B26F2. Refer to 

PCS-68, "DTC Logic"

.

NO

>> Repair or replace harness.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

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>> INSPECTION END

(+)

(–)

Voltage

(Approx.)

IPDM E/R

Connector

Terminal

E10

27

Ground

0 V

IPDM E/R

Ground

Continuity

Connector

Terminal

E10

27

Not existed