Infiniti M35/M45 Y50. Manual - part 970
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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Concept of Auto Active Test
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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
PKIC0274E
Symptom
Inspection contents
Possible cause
Any of front wipers,
tail lamps, parking
lamps, front fog
lamps, and head
lamps (HI, LO) do not
operate.
Perform auto active
test. Does system
in question oper-
ate?
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
Rear window defog-
ger 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
A/C compressor does
not operate.
Perform auto active
test. Does magnetic
clutch operate?
YES
●
BCM signal input circuit malfunction
●
CAN communication signal malfunction between BCM and ECM.
●
CAN communication signal malfunction 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