Nissan Xterra. Manual - part 527

PCS

DIAGNOSIS SYSTEM (IPDM E/R)

PCS-11

< SYSTEM DESCRIPTION >

[IPDM E/R]

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CONSULT Function (IPDM E/R)

INFOID:0000000009483721

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with IPDM E/R.

SELF DIAGNOSTIC RESULT

Refer to 

PCS-21, "DTC Index"

.

DATA MONITOR

Any of the following components do not operate

• Front wipers
• Tail  lamps
• License plate lamps
• Parking  lamps
• Front fog lamps (if equipped)
• Headlamps (Hi, Lo)

Perform auto active test.
Does the applicable system 
operate?

YES

BCM signal input system

NO

• Lamp or front wiper motor 

malfunction

• Lamp or front wiper motor 

ground circuit

• Harness or connector be-

tween IPDM E/R and appli-
cable system

• IPDM E/R (integrated relay 

malfunction)

A/C compressor does not operate

Perform auto active test.
Does the A/C compressor op-
erate?

YES

• BCM signal input circuit
• CAN communication signal 

between BCM and ECM

• CAN communication signal 

between ECM and IPDM E/
R

NO

• Magnetic clutch malfunction
• Harness or connector be-

tween IPDM E/R and mag-
netic clutch

• IPDM E/R (integrated relay 

malfunction)

Cooling fan does not operate

Perform auto active test.
Does the cooling fan operate?

YES

• ECM signal input circuit
• CAN communication signal 

between ECM and IPDM E/
R

NO

• Cooling fan motor malfunc-

tion

• Harness or connector be-

tween IPDM E/R and cool-
ing fan

• IPDM E/R (integrated relay 

malfunction)

Symptom

Inspection contents

Possible cause

Direct Diagnostic Mode

Description

Self Diagnostic Result

The IPDM E/R self diagnostic results are displayed.

Data Monitor

The IPDM E/R input/output data is displayed in real time.

Active Test

The IPDM E/R activates outputs to test components.

CAN Diag Support Mntr

The result of transmit/receive diagnosis of CAN communication is displayed.

Monitor Item [Unit]

Main

Signals

Description

MOTOR FAN REQ [1/2/3/4]

×

Indicates cooling fan speed signal received from ECM on CAN communication 
line

AC COMP REQ [On/Off]

×

Indicates A/C compressor request signal received from ECM on CAN commu-
nication line

PCS-12

< SYSTEM DESCRIPTION >

[IPDM E/R]

DIAGNOSIS SYSTEM (IPDM E/R)

ACTIVE TEST

TAIL&CLR REQ [On/Off]

×

Indicates position light request signal received from BCM on CAN communica-
tion line

HL LO REQ [On/Off]

×

Indicates low beam request signal received from BCM on CAN communication 
line

HL HI REQ [On/Off]

×

Indicates high beam request signal received from BCM on CAN communication 
line

FR FOG REQ [On/Off]

×

Indicates front fog light request signal received from BCM on CAN communica-
tion line

FR WIP REQ [Stop/1LOW/Low/Hi]

×

Indicates front wiper request signal received from BCM on CAN communication 
line

WIP AUTO STOP [STOP P/ACT P]

×

Indicates condition of front wiper auto stop signal

WIP PROT [Off/BLOCK]

×

Indicates condition of front wiper fail-safe operation

ST RLY REQ [On/Off]

Indicates starter request signal received from ECM on CAN communication line

IGN RLY [On/Off]

×

Indicates condition of ignition relay

RR DEF REQ [On/Off]

×

Indicates rear defogger request signal received from BCM on CAN communica-
tion line

OIL P SW [Open/Close]

Indicates condition of oil pressure switch

DTRL REQ [Off]

Indicates daytime light request signal received from BCM on CAN communica-
tion line

THFT HRN REQ [On/Off]

Indicates theft warning horn request signal received from BCM on CAN commu-
nication line

HORN CHIRP [On/Off]

Indicates horn reminder signal received from BCM on CAN communication line

Monitor Item [Unit]

Main

Signals

Description

Test item

Description

REAR DEFOGGER

This test is able to check rear defogger operation [On/Off].

FRONT WIPER

This test is able to check wiper motor operation [Hi/Lo/Off].

MOTOR FAN

This test is able to check cooling fan operation [4/3/2/1].

EXTERNAL LAMPS

This test is able to check external lamp operation [Fog/Hi/Lo/TAIL/Off].

HORN

This test is able to check horn operation [On].

PCS

U1000 CAN COMM CIRCUIT

PCS-13

< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R]

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DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000009483722

Refer to 

LAN-4, "System Description"

.

DTC Logic

INFOID:0000000009483723

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

Diagnosis Procedure

INFOID:0000000009483724

1.

 PERFORM SELF DIAGNOSTIC

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

2. Check “SELF-DIAG RESULTS” of IPDM E/R.
Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-14, "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

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

PCS-14

< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R]

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000009483725

Regarding Wiring Diagram information, refer to 

PCS-22, "Wiring Diagram"

.

1.

 CHECK FUSIBLE LINKS

Check that the following IPDM E/R fusible links are not blown.

Is the fusible link blown?

YES

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

NO

>> GO TO 2

2.

 CHECK BATTERY POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R.

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

ground.

Is there voltage on all pins?

YES

>> GO TO 3

NO

>> Repair or replace harness.

3.

 CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between IPDM E/R harness connectors and

ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair or replace harness.

Terminal No.

Signal name

Fusible link No.

1

Battery

A, D

2

C

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A, E, I

Terminals

Ignition 

switch posi-

tion

Voltage (V)

(Approx.)

(+)

(

−)

Connector

Terminal

E118 (A)

1

Ground

OFF

Battery
voltage

2

E120 (B)

22

AWMIA0506ZZ

IPDM E/R

Ground

Continuity

Connector

Terminal

E122 (A)

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Yes

E124 (B)

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AWMIA0024ZZ