Infiniti G35 (V35). Manual - part 657

PG-22

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

Concept of Auto Active Test

●

IPDM E/R actuates auto active test mode when it receives door switch signal from BCM via CAN commu-
nication line. Therefore, when auto active test mode is activated successfully, CAN communication
between IPDM E/R and BCM is normal.

●

If any of systems controlled by IPDM E/R cannot be operated, possible cause can be easily diagnosed
using auto active test.

Diagnosis chart in auto active test mode

Symptom

Inspection contents

Possible cause

Rear window defogger 
does not operate.

Perform auto active 
test. Does rear win-
dow defogger oper-
ate?

YES

●

BCM signal input circuit malfunction

NO

●

Rear window defogger relay malfunction

●

Harness/connector malfunction between IPDM E/R and rear window 
defogger relay

●

Open circuit of rear window defogger

●

IPDM E/R malfunction

Any of front wipers, tail 
and parking lamps, front 
fog lamps, and head 
lamps (Hi, Lo) do not 
operate.

Perform auto active 
test. Does system in 
question operate?

YES

●

BCM signal input system malfunction

NO

●

Lamp/wiper motor malfunction

●

Lamp/wiper motor ground circuit malfunction

●

Harness/connector malfunction between IPDM E/R and system in question

●

IPDM E/R (integrated relay) malfunction

A/C compressor does 
not operate.

Perform auto active 
test. Does magnetic 
clutch operate?

YES

●

BCM signal input circuit malfunction

●

CAN communication signal between BCM and ECM.

●

CAN communication signal between ECM and IPDM E/R

NO

●

Magnetic clutch malfunction

●

Harness/connector malfunction between IPDM E/R and magnetic clutch

●

IPDM E/R (integrated relay) malfunction

Cooling fan does not 
operate.

Perform auto active 
test. Does cooling 
fan operate?

YES

●

ECM signal input circuit

●

CAN communication signal between ECM and IPDM E/R

NO

●

Cooling fan motor malfunction

●

Harness/connector malfunction between IPDM E/R and cooling fan motor

●

IPDM E/R (integrated relay) malfunction

Oil pressure warning 
lamp does not operate.

Perform auto active 
test. Does oil pres-
sure warning lamp 
blink?

YES

●

Harness/connector malfunction between IPDM E/R and oil pressure switch

●

Oil pressure switch malfunction

●

IPDM E/R malfunction

NO

●

CAN communication signal between IPDM E/R and combination meter

●

Combination meter

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

PG-23

C

D

E

F

G

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A

B

PG

Schematic

NKS000QK

TKWM5245E

PG-24

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

IPDM E/R Terminal Arrangement

NKS000QL

CKIM0763E

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

PG-25

C

D

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PG

IPDM E/R Power/Ground Circuit Inspection

NKS000QM

1. 

CHECK FUSE AND FUSIBLE LINK

Make sure the following fusible links or IPDM E/R fuses are not blown.

OK or NG

OK

>> GO TO 2.

NG

>> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new one.

2. 

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector E3.

3.

Check voltage between IPDM E/R harness connector E3 termi-
nals 1, 2 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness and connector.

3. 

CHECK GROUND CIRCUIT

1.

Disconnect IPDM E/R harness connectors E8 and E9.

2.

Check continuity between IPDM E/R harness connectors E8 ter-
minal 38, E9 terminal 50, 60 and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Repair harness and connector.

Terminal No.

Power source

Fuse, fusible link No.

1

Battery 

E 

2

C

—

71 

78 

1, 2 – Ground

: Battery voltage

PKIB6562E

38, 50, 60 – Ground

: Continuity should exist.

SKIA6184E