Nissan Maxima. Manual - part 883

PCS-12

< SYSTEM DESCRIPTION >

[IPDM E/R]

DIAGNOSIS SYSTEM (IPDM E/R)

Concept of auto active test

• IPDM E/R starts the auto active test with the door switch signals transmitted by BCM via CAN communica-

tion. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto

active test starts successfully.

• The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.

Diagnosis chart in auto active test mode

AWMIA1321GB

Symptom

Inspection contents

Possible cause

Any of the following components do not operate
• Parking lamps
• Side marker lamps
• License plate lamps
• Tail  lamps
• Front fog lamps (if equipped)
• Headlamp (HI, LO)
• Front wiper

Perform auto active test.
Does the applicable system 
operate?

YES

BCM signal input circuit

NO

• Lamp or motor
• Lamp or motor ground cir-

cuit

• Harness or connector be-

tween IPDM E/R and appli-
cable system

• IPDM  E/R

A/C compressor does not operate

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

YES

• Combination meter signal 

input circuit

• CAN communication signal 

between combination meter 
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

PCS

DIAGNOSIS SYSTEM (IPDM E/R)

PCS-13

< SYSTEM DESCRIPTION >

[IPDM E/R]

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CONSULT Function (IPDM E/R)

INFOID:0000000009467100

APPLICATION ITEM

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

ECU IDENTIFICATION

The IPDM E/R part number is displayed.

SELF DIAGNOSTIC RESULT

Refer to 

PCS-27, "DTC Index"

.

DATA MONITOR

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 combi-
nation meter

• 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 relays

• Cooling fan relays
• Harness or connector be-

tween IPDM E/R and cool-
ing fan relays

• IPDM E/R

Symptom

Inspection contents

Possible cause

Direct Diagnostic Mode

Description

ECU Identification

The IPDM E/R part number is displayed.

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 diplayed.

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

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

PCS-14

< SYSTEM DESCRIPTION >

[IPDM E/R]

DIAGNOSIS SYSTEM (IPDM E/R)

ACTIVE TEST

CAN DIAG SUPPORT MNTR

Refer to 

LAN-12, "CAN Diagnostic Support Monitor"

.

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

IGN RLY1 -REQ [On/Off]

Indicates ignition switch ON signal received from BCM on CAN communication 
line

IGN RLY [On/Off]

×

Indicates condition of ignition relay-1

PUSH SW [On/Off]

Indicates condition of push-button ignition switch

INTER/NP SW [On/Off]

Indicates condition of CVT shift position

ST RLY CONT [On/Off]

Indicates starter relay status signal received from BCM on CAN communication 
line

IHBT RLY -REQ [On/Off]

Indicates starter control relay signal received from BCM on CAN communication 
line

ST/INHI RLY [Off/ ST /INHI]

Indicates condition of starter relay and starter control relay

DETENT SW [On/Off]

Indicates condition of CVT shift selector (park position switch)

DTRL REQ [Off]

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

OIL P SW [Open/Close]

Indicates condition of oil pressure switch

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

HORN

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

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].

PCS

U1000 CAN COMM CIRCUIT

PCS-15

< DTC/CIRCUIT DIAGNOSIS >

[IPDM E/R]

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DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000009467101

Refer to 

LAN-6, "System Description"

.

DTC Logic

INFOID:0000000009467102

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009467103

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-15, "Trouble Diagnosis Flow Chart"

.

NO

>> Refer to 

GI-41, "Intermittent Incident"

.

DTC

CONSULT Display

DTC Detection Condition

Possible Cause

U1000

CAN COMM CIRCUIT

When any listed module cannot communi-
cate with CAN communication signal con-
tinuously for 2 seconds or more

In CAN communication system, any item (or items) 
of the following listed below is malfunctioning.
• Transmission
• Receiving (ECM)
• Receiving (METER/M&A)
• Receiving (BCM)