Nissan Altima L32. Instruction — part 977
MWI-160
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
ABMIA0471GB
MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-161
< ECU DIAGNOSIS >
C
D
E
F
G
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M
B
A
O
P
ABMIA0472GB
MWI-162
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Fail Safe
INFOID:0000000004495963
CAN COMMUNICATION CONTROL
When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN
communication recovers normally, it also returns to normal control.
If No CAN Communication Is Available With ECM
ABMIA0473GB
MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-163
< ECU DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
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 position 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.
Control part
Fail-safe in operation
Cooling fan
• Signals cooling fans ON when the ignition switch is turned ON
• Signals cooling fans OFF when the ignition switch is turned OFF
A/C compressor
A/C relay OFF
Generator
Outputs the power generation command signal (PWM signal) 0%
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
• Illumination
• 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 wiper is set in the INT mode and the front wiper
motor is operating.
Front fog lamps (if equipped)
Front fog lamp relay OFF
Horn
Horn OFF
Ignition relay
The status just before activation of fail-safe is maintained.
Starter motor
Starter control relay OFF
Electronic steering column lock unit
Electronic steering column lock relay OFF
DTC
Ignition switch
Ignition relay
Tail lamp relay
—
ON
ON
—
—
OFF
OFF
—
B2098: IGN RELAY ON
OFF
ON
ON (10 minutes)
B2099: IGN RELAY OFF
ON
OFF
—
Ignition switch
Front 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.
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