Nissan Cube. Manual - part 705

PCS

U1000 CAN COMM CIRCUIT

PCS-45

< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R (WITHOUT I-KEY)]

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DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000009945026

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-22, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000009945027

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009945028

1.

PERFORM SELF DIAGNOSTIC

1.

Turn the ignition switch ON and wait for 2 seconds or more.

2.

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

Is DTC “U1000” displayed?

YES

>> Refer to 

LAN-13, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-40, "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-46

< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R (WITHOUT I-KEY)]

B2098 IGNITION RELAY ON STUCK

B2098 IGNITION RELAY ON STUCK

Description

INFOID:0000000009945029

The ignition relay integrated in IPDM E/R is operated with ignition switch ON signal from the ignition switch.

DTC Logic

INFOID:0000000009945030

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

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-46, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000009945031

1.

CHECK SELF DIAGNOSTIC RESULT

Check DTC using CONSULT.

What is the display history of DTC “B2098”?

“CRNT”>> GO TO 2.
“PAST” >> GO TO 3.

2.

CHECK IGNITION RELAY CONTROL CIRCUIT VOLTAGE

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R connector.

3.

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

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-64, "Removal and Installation"

.

NO

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

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

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 circuits of the ignition relay 
inside and ignition switch status from BCM via CAN communication)

• IPDM  E/R
• BCM
• Harness or connector 

(Ignition relay circuit)

(+)

(–)

Voltage

(Approx.)

IPDM E/R

Connector

Terminal

E12

18

Ground

0 V

PCS

B2099 IGNITION RELAY OFF STUCK

PCS-47

< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R (WITHOUT I-KEY)]

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B2099 IGNITION RELAY OFF STUCK

Description

INFOID:0000000009945032

The ignition relay integrated in IPDM E/R is operated with ignition switch ON signal from the ignition switch.

DTC Logic

INFOID:0000000009945033

DTC DETECTION LOGIC

NOTE:

When IPDM E/R power supply voltage is low (Approx. 7 - 8 V for about 1 second), the “DTC: B2099” may be detected.

DTC CONFIRMATION PROCEDURE

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-47, "Diagnosis Procedure"

.

NO

>> INSPECTION END.

Diagnosis Procedure

INFOID:0000000009945034

1.

CHECK FUSE

Check that all of the fuses installed on the downstream of the contact point side circuit of the ignition relay in
IPDM E/R are not blown.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after replacing the affected circuit if a fuse is blown.

2.

CHECK IGNITION RELAY CONTACT POINT SIDE CIRCUIT VOLTAGE

1.

Turn ignition switch ON

2.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace IPDM E/R. Refer to 

PCS-64, "Removal and Installation"

.

3.

CHECK BATTERY VOLTAGE

Check battery voltage.
Which is the measurement result?

More than 12.4 V>>GO TO 4.
Less than 12.4 V>>Perform battery inspection. Refer to 

PG-3, "How to Handle Battery"

.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

DTC

CONSULT display 

description

DTC Detection Condition

Possible causes

B2099

IGN RELAY OFF 
CIRC

The ignition relay OFF is detected for 1 second at ignition switch ON
(CPU monitors the status at the contact circuits of the ignition relay 
inside and ignition switch status from BCM via CAN communication)

• IPDM  E/R
• Harness or connector

(Ignition relay circuit)

(+)

(–)

Voltage

IPDM E/R

Connector

Terminal

E17

68

Ground

Battery voltage

PCS-48

< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R (WITHOUT I-KEY)]

B2099 IGNITION RELAY OFF STUCK

>> INSPECTION END