Nissan Pathfinder. Manual — part 885
PCS-16
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
37
(W)
Ground Shift N/P
Input
Ignition
switch ON
CVT selector lever in P or
N position
Battery voltage
CVT selector lever in any
position other than P or N
position
0V
38
(P)
Ground Push start switch
Input
Press the push-button ignition switch
0V
Release the push-button ignition switch
Battery voltage
41
(B)
Ground Ground (signal)
—
Ignition switch ON
0V
43
(L)
Ground Ignition signal*
Input
Ignition switch OFF or ACC
0V
Ignition switch ON
Battery voltage
45
(LG)
Ground
Power distribution sensor
signal-E/R
—
• Ignition switch ON (READY)
• Both A/C switch and blower motor
switch ON (A/C compressor oper-
ates)
1.0 - 4.0V
47
(Y)
Ground
Power distribution sensor
power-E/R
—
Ignition switch ON
5V
48
(V)
Ground
Power distribution sensor
ground-E/R
—
Ignition switch ON
0V
51
(W)
Ground Starter motor
Output
At engine cranking
Battery voltage
52
(W)
Ground O2 sensor #2
Output
Ignition switch OFF
0V
Ignition switch ON
Battery voltage
53
(W)
Ground O2 sensor #1
Output
Ignition switch OFF
0V
Ignition switch ON
Battery voltage
54
(L)
Ground Injector #1
Output
Ignition switch OFF
0V
Ignition switch ON
Battery voltage
55
(W)
Ground Ignition coil
Output
Ignition switch OFF
(For a few seconds after turning ignition
switch OFF)
0V
• Ignition switch ON
• Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)
Battery voltage
56
(SB)
Ground A/C compressor
Output
Engine
running
A/C compressor OFF
0V
A/C compressor ON
(A/C compressor is oper-
ating)
Battery voltage
57
(R)
Ground Electronic throttle control
Output
Ignition switch OFF
(For a few seconds after turning ignition
switch OFF)
0V
• Ignition switch ON
• Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)
Battery voltage
58
(GR)
Ground ECM battery
Output
Ignition switch OFF
Battery voltage
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
Signal name
Input/
Output
+
−
PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-17
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
59
(L)
Ground Engine solenoid
Output
Ignition switch OFF
(For a few seconds after turning ignition
switch OFF)
0V
• Ignition switch ON
• Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)
Battery voltage
60
(LG)
Ground Injector #2
Output
Ignition switch OFF
0V
Ignition switch ON
Battery voltage
61
(Y)
Ground
Transmission control mod-
ule
Output
Ignition switch OFF
0V
Ignition switch ON
Battery voltage
63
(L)
Ground Inhibit switch
Output
Ignition switch OFF
0V
Ignition switch ON
Battery voltage
64
(LG)
Ground Start IG EGI
Output
Ignition switch OFF
0V
Ignition switch ON
Battery voltage
65
(G)
Ground
Throttle control motor re-
lay
Output
Ignition switch ON
→ OFF
0 -1.0V
↓
Battery voltage
↓
0V
Ignition switch ON
0 - 1.0V
66
(G)
Ground N/P switch
Input
Ignition
switch ON
CVT selector lever in P or
N position
Battery voltage
CVT selector lever in any
position other than P or N
position
0V
69
(W)
Ground Fuel pump relay
Output
• Approximately 1 second after turning
the ignition switch ON
• Engine running
0 - 1.0V
Approximately 1 second or more after
turning the ignition switch ON
Battery voltage
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
Signal name
Input/
Output
+
−
PCS-18
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
71
(LG)
Ground Alternator C
Output
Ignition switch ON
6.3V
40% is set on “Active test”, “ALTERNA-
TOR DUTY” of “ENGINE”
3.8V
80% is set on “Active test”, “ALTERNA-
TOR DUTY” of “ENGINE”
1.4V
72
(V)
Ground
ECM relay
(Self shut-off)
Output
Ignition switch OFF
(For a few seconds after turning ignition
switch OFF)
Battery voltage
• Ignition switch ON
• Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)
0 - 1.5V
74
(R)
Ground Washer motor
Output
Ignition switch ON
Battery voltage
75
(R)
Ground Headlamp LO RH
Output
Ignition
switch ON
Lighting switch OFF
0V
Lighting switch 2ND
Battery voltage
76
(L)
Ground Headlamp LO LH
Output
Ignition
switch ON
Lighting switch OFF
0V
Lighting switch 2ND
Battery voltage
78
(W)
Ground Front fog lamp RH
Output
Ignition
switch ON
Fog lamp switch OFF
0V
Fog lamp switch ON
Battery voltage
79
(L)
Ground Front fog lamp LH
Output
Ignition
switch ON
Fog lamp switch OFF
0V
Fog lamp switch ON
Battery voltage
80
(W)
Ground Headlamp HI RH
Output
Ignition
switch ON
• Lighting switch HI
• Lighting switch PASS
Battery voltage
Lighting switch OFF
0V
81
(G)
Ground Headlamp HI LH
Output
Ignition
switch ON
• Lighting switch HI
• Lighting switch PASS
Battery voltage
Lighting switch OFF
0V
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
Signal name
Input/
Output
+
−
JPMIA0001GB
JPMIA0002GB
JPMIA0003GB
PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-19
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
*: Ignition battery saver logic turns OFF the IPDM E/R and BCM if the ignition is ON for 30 minutes with the engine OFF.
Fail Safe
INFOID:0000000009175191
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 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.
82
(P)
Ground
Power distribution sensor
signal-fem
—
• Ignition switch ON (READY)
• Both A/C switch and blower motor
switch ON (electric compressor oper-
ates)
1.0 - 4.0V
83
(G)
Ground
Power distribution sensor
power-fem
—
Ignition switch ON
5V
85
(P)
Ground
Daytime running lamps re-
lay
Output
Ignition
switch ON
Daytime light system ac-
tive
Battery voltage
Ignition
switch ON
Daytime light system inac-
tive
0V
86
(L)
Ground
Power distribution sensor
ground-fem
—
Ignition switch ON
0V
90
(LG)
Ground Clearance lamps
Output
Ignition
switch ON
Lighting switch 1ST
Battery voltage
Lighting switch OFF
0V
93
(V)
Ground Fan motor PWM
Output
Engine idling
0-5V
94
(LG)
Ground Hood switch 2
Input
Ignition
switch ON
Hood closed
0V
Hood open
Battery voltage
96
(R)
Ground Hood switch
Input
Ignition
switch ON
Hood closed
0V
Hood open
Battery voltage
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
Signal name
Input/
Output
+
−
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
• Side marker 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 wiper is set in the INT mode and the front wiper
motor is operating.
Horn
Horn OFF
Ignition relay
The status just before activation of fail-safe is maintained.
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