2009 INFINITI QX56 Factory Service Manual

cooling engine coolant run flat fuel consumption low beam navigation system

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Page 2809 of 4171

INFINITI QX56 2009 Factory Service Manual MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-87
< ECU DIAGNOSIS >
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AAMWA0228GB
Revision: December 20092009 QX56

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INFINITI QX56 2009 Factory Service Manual MWI-88
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
ABMIA0017GB
Revision: December 20092009 QX56

Page 2811 of 4171

INFINITI QX56 2009 Factory Service Manual MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-89
< ECU DIAGNOSIS >
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Fail SafeINFOID:0000000004225406
CAN COMMUNICATION CONTROL
When CAN communicatio

Page 2812 of 4171

INFINITI QX56 2009 Factory Service Manual MWI-90
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors

MWI-90
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop posit ion by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
Control part Fail-safe in operation
Cooling fan • Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF
Control part
Fail-safe in operation
Headlamp • Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high relay OFF
•Parking lamps
• License plate lamps
• Tail lamps • Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper • The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail- safe control is activated while the front wipe r is set in the INT mode and the front wiper
motor is operating.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF
Ignition switch Ignition relayTail lamp relay
ON ON —
OFF OFF —
Ignition switchFront wiper switch Auto stop signal
ON OFF
Front wiper stop position signal cannot be
input 10 seconds.
ON The signal does not change for 10 seconds.
Revision: December 20092009 QX56

Page 2813 of 4171

INFINITI QX56 2009 Factory Service Manual MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-91
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DTC IndexINFOID:0000000004225407
NOTE:
The details of TIME display are as follow

Page 2814 of 4171

INFINITI QX56 2009 Factory Service Manual MWI-92
< SYMPTOM DIAGNOSIS >
THE FUEL GAUGE POINTER DOES NOT MOVE
SYMPTOM DIAGNOSIS
THE FUEL GAUGE POINTER DOES NOT MOVE
DescriptionINFOID:0000000003776669
Fuel gauge needle will not move from a certa

Page 2815 of 4171

INFINITI QX56 2009 Factory Service Manual MWI
THE FUEL GAUGE POINTER DOES NOT MOVE TO "F" WHEN REFUELING
MWI-93
< SYMPTOM DIAGNOSIS >
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THE FUEL GAUGE POINTER DOES NOT MOVE TO "F" WHEN REFUEL-
ING
DescriptionINFOID

Page 2816 of 4171

INFINITI QX56 2009 Factory Service Manual MWI-94
< SYMPTOM DIAGNOSIS >
THE OIL PRESSURE WARNING LAMP DOES NOT TURN ON
THE OIL PRESSURE WARNING LAMP DOES NOT TURN ON
DescriptionINFOID:0000000003776673
The oil pressure warning lamp stays off wh

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