Infiniti EX35. Manual - part 1128

PCS

DIAGNOSIS SYSTEM (IPDM E/R)

PCS-13

< FUNCTION DIAGNOSIS >

[IPDM E/R]

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CONSULT-III Function (IPDM E/R)

INFOID:0000000003131995

APPLICATION ITEM

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

SELF DIAGNOSTIC RESULT

Refer to 

PCS-32, "DTC Index"

.

DATA MONITOR

A/C compressor does not operate

Perform auto active test.
Does the magnet clutch oper-
ate?

YES

• Unified meter and A/C amp. 

signal input circuit

• CAN communication signal 

between unified meter and 
A/C amp. and ECM

• CAN communication signal 

between ECM and IPDM E/
R

NO

• Magnet clutch
• Harness or connector be-

tween IPDM E/R and mag-
net clutch

• IPDM E/R

Oil pressure warning lamp does not operate

Perform auto active test.
Does the oil pressure warning 
lamp blink?

YES

• Harness or connector be-

tween IPDM E/R and oil 
pressure switch

• Oil pressure switch
• IPDM E/R

NO

• CAN communication signal 

between IPDM E/R and 
BCM

• CAN communication signal 

between BCM and unified 
meter and A/C amp.

• Combination meter

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
• Harness or connector be-

tween cooling fan and cool-
ing fan control module

• Cooling fan control module
• Harness or connector be-

tween IPDM E/R and cool-
ing fan control module

• Cooling fan relay
• Harness or connector be-

tween IPDM E/R and cool-
ing fan relay

• IPDM E/R

Symptom

Inspection contents

Possible cause

Diagnosis mode

Description

Ecu Identification

Allows confirmation of IPDM E/R part number.

Self Diagnostic Result

Displays the diagnosis results judged by IPDM E/R.

Data Monitor

Displays the real-time input/output data from IPDM E/R input/output data.

Active Test

IPDM E/R can provide a drive signal to electronic components to check their operations.

CAN Diag Support Monitor

The results of transmit/receive diagnosis of CAN communication can be read.

PCS-14

< FUNCTION DIAGNOSIS >

[IPDM E/R]

DIAGNOSIS SYSTEM (IPDM E/R)

Monitor item

Monitor Item

[Unit]

MAIN SIG-

NALS

Description

RAD FAN REQ
[%]

×

Displays the value of the cooling fan speed signal received from ECM via CAN 
communication.

AC COMP REQ
[Off/On]

×

Displays the status of the A/C compressor request signal received from ECM via 
CAN communication.

TAIL&CLR REQ
[Off/On]

×

Displays the status of the position light request signal received from BCM via CAN 
communication.

HL LO REQ
[Off/On]

×

Displays the status of the low beam request signal received from BCM via CAN 
communication.

HL HI REQ
[Off/On]

×

Displays the status of the high beam request signal received from BCM via CAN 
communication.

FR FOG REQ
[Off/On]

×

Displays the status of the front fog light request signal received from BCM via 
CAN communication.

FR WIP REQ
[Stop/1LOW/Low/Hi]

×

Displays the status of the front wiper request signal received from BCM via CAN 
communication.

WIP AUTO STOP
[STOP P/ACT P]

×

Displays the status of the front wiper auto stop signal judged by IPDM E/R.

WIP PROT
[Off/BLOCK]

×

Displays the status of the front wiper fail-safe operation judged by IPDM E/R.

IGN RLY1 -REQ
[Off/On]

Displays the status of the ignition switch ON signal received from BCM via CAN 
communication.

IGN RLY
[Off/On]

×

Displays the status of the ignition relay judged by IPDM E/R.

PUSH SW
[Off/On]

Displays the status of the push-button ignition switch judged by IPDM E/R.

INTER/NP SW
[Off/On]

Displays the status of the shift position judged by IPDM E/R.

ST RLY CONT
[Off/On]

Displays the status of the starter relay status signal received from BCM via CAN 
communication.

IHBT RLY -REQ
[Off/On]

Displays the status of the starter control relay signal received from BCM via CAN 
communication.

ST/INHI RLY
[Off/ ST /INHI/UNKWN]

Displays the status of the starter relay and starter control relay judged by IPDM 
E/R.

DETENT SW
[Off/On]

Displays the status of the control device (detention switch) judged by IPDM E/R.

S/L RLY -REQ
[Off/On]

Displays the status of the steering lock relay request received from BCM via CAN 
communication.

S/L STATE
[LOCK/UNLOCK/UNKWN]

Displays the status of the steering lock judged by IPDM E/R.

DTRL REQ
[Off]

NOTE:
The item is indicated, but not monitored.

OIL P SW
[Open/Close]

Displays the status of the oil pressure switch judged by IPDM E/R.

HOOD SW
[Off/On]

Displays the status of the hood switch judged by IPDM E/R.

HL WASHER REQ
[Off]

NOTE:
The item is indicated, but not monitored.

THFT HRN REQ
[Off/On]

Displays the status of the theft warning horn request signal received from BCM 
via CAN communication.

PCS

DIAGNOSIS SYSTEM (IPDM E/R)

PCS-15

< FUNCTION DIAGNOSIS >

[IPDM E/R]

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ACTIVE TEST

Test item

HORN CHIRP
[Off/On]

Displays the status of the horn reminder signal received from BCM via CAN com-
munication.

CRNRNG LMP REQ
[Off]

NOTE:
The item is indicated, but not monitored.

Monitor Item

[Unit]

MAIN SIG-

NALS

Description

Test item

Operation

Description

CORNERING LAMP

Off

NOTE:
The item is indicated, but cannot be tested.

LH

RH

HORN

On

Operates horn relay 1 and horn relay 2 for 20 ms.

FRONT WIPER

Off

OFF

Lo

Operates the front wiper relay.

Hi

Operates the front wiper relay and front wiper high relay.

MOTOR FAN

1

OFF

2

Outputs 50% pulse duty signal (PWM signal) to the cooling fan control module.

3

Outputs 80% pulse duty signal (PWM signal) to the cooling fan control module.

4

Outputs 100% pulse duty signal (PWM signal) to the cooling fan control module.

HEAD LAMP WASHER

On

NOTE:
The item is indicated, but cannot be tested.

EXTERNAL LAMPS

Off

OFF

TAIL

Operates the tail lamp relay.

Lo

Operates the headlamp low relay.

Hi

Operates the headlamp low relay and ON/OFF the headlamp high relay at 1 sec-
ond intervals.

Fog

Operates the front fog lamp relay.

PCS-16

< COMPONENT DIAGNOSIS >

[IPDM E/R]

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000003131996

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-27, "CAN Communication Signal Chart"

.

DTC Logic

INFOID:0000000003131997

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

Diagnosis Procedure

INFOID:0000000003131998

1.

PERFORM SELF DIAGNOSTIC

1.

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

2.

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

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-18, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-38, "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

CAN communication system