Nissan Maxima. Manual — part 885
PCS-20
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
TERMINAL LAYOUT
PHYSICAL VALUES
IHBT RLY -REQ
Ignition switch ON
Off
At engine cranking
On
ST/INHI RLY
Ignition switch ON
Off
At engine cranking
ST
→INHI
The status of starter relay or starter control relay cannot be recognized by
the battery voltage malfunction, etc. when the starter relay is ON and the
starter control relay is OFF
UNKWN
DETENT SW
Ignition switch ON
• Press the selector button with
CVT selector lever in P position
• CVT selector lever in any posi-
tion other than P
Off
Release the CVT selector button with CVT selector lever in P position
On
DTRL -REQ
DTRL ON
On
DTRL OFF
Off
OIL P SW
Ignition switch OFF, ACC or engine running
Open
Ignition switch ON
Close
THFT HRN REQ
Not operated
Off
• Panic alarm is activated
• Horn is activated with VEHICLE SECURITY (THEFT WARNING) SYS-
TEM
On
HORN CHIRP
Not operated
Off
Door locking with Intelligent Key (horn chirp mode)
On
Monitor Item
Condition
Value/Status
ALMIA0128ZZ
PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-21
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
Signal name
Input/
Output
+
−
1
(R)
Ground Battery power supply
Input
Ignition switch OFF
Battery voltage
2
(L)
Ground Battery power supply
Input
Ignition switch OFF
Battery voltage
4
(LG)
Ground Front wiper LO
Output
Ignition
switch ON
Front wiper switch OFF
0 V
Front wiper switch LO
Battery voltage
5
(Y)
Ground Front wiper HI
Output
Ignition
switch ON
Front wiper switch OFF
0 V
Front wiper switch HI
Battery voltage
6
(L)
Ground
Daytime light relay power
supply (Canada models
only)
Output
Ignition switch OFF
Battery voltage
7
(GR)
Ground
Tail, license plate lamps &
interior lamps
Output
Ignition
switch ON
Lighting switch OFF
0 V
Lighting switch 1ST
Battery voltage
10
(BR)
Ground ECM relay power supply
Output
Ignition switch OFF
(For a few seconds after turning ignition
switch OFF)
0 V
• Ignition switch ON
• Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)
Battery voltage
12
(B)
Ground Ground
—
Ignition switch ON
0 V
13
(SB)
Ground Fuel pump power supply
Output
Approximately 1 second or more after
turning the ignition switch ON
0 V
• Approximately 1 second after turning
the ignition switch ON
• Engine running
Battery voltage
15
(W)
Ground
Ignition relay-1 power sup-
ply
Output
Ignition switch OFF
0 V
Ignition switch ON
Battery voltage
16
(R)
Ground Front wiper auto stop
Input
Ignition
switch ON
Front wiper stop position
0 V
Any position other than
front wiper stop position
Battery voltage
19
(Y)
Ground
Ignition relay-1 power sup-
ply
Output
Ignition switch OFF
0 V
Ignition switch ON
Battery voltage
20
(L)
Ground Ambient sensor ground
—
Ignition switch ON
0V
21
(LG)
Ground Ambient sensor
—
Ignition switch ON
5V
22
(SB)
Ground
Refrigerant pressure sen-
sor ground
—
Ignition switch ON
0V
23
(GR)
Ground
Refrigerant pressure sen-
sor
—
• Ignition switch ON (READY)
• Both A/C switch and blower motor
switch ON (electric compressor oper-
ates)
1.0 - 4.0V
24
(G)
Ground
Refrigerant pressure sen-
sor power supply
—
Ignition switch ON
5V
25
(GR)
Ground
Ignition relay-1 power sup-
ply
Output
Ignition switch OFF
0 V
Ignition switch ON
Battery voltage
PCS-22
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
27
(W)
Ground Ignition relay monitor
Input
Ignition switch OFF or ACC
Battery voltage
Ignition switch ON
0 V
28
(SB)
Ground
Push-button ignition
switch
Input
Press the push-button ignition switch
0 V
Release the push-button ignition switch Battery voltage
30
(BR)
Ground Starter relay control
Input
CVT selector lever in any position other
than P or N (ignition switch ON)
0 V
CVT selector lever P or N (ignition
switch ON)
Battery voltage
34
(O)
Ground Cooling fan relay-3 control
Input
Ignition switch OFF or ACC
0 V
Ignition switch ON
0.7 V
35
(P)
Ground Cooling fan motor control
Output
Ignition switch OFF or ACC
0 V
Ignition switch ON
0.7 V
36
(G)
Ground Battery power supply
Input
Ignition switch OFF
Battery voltage
38
(GR)
Ground Cooling fan motor control
Output
Ignition switch OFF or ACC
0 V
Ignition switch ON
0.7 V
39
(P)
—
CAN - L
Input/
Output
—
—
40
(L)
—
CAN - H
Input/
Output
—
—
41
(B)
Ground Ground
—
Ignition switch ON
0 V
42
(SB)
Ground Cooling fan relay-2 control
Input
Ignition switch OFF or ACC
0 V
Ignition switch ON
0.7 V
43
(Y)
Ground
CVT shift selector
(Detention switch)
Input
Ignition
switch ON
Press the CVT selector
button (CVT selector lever
P)
Battery voltage
• CVT selector lever in
any position other than
P
• Release the CVT selec-
tor button (CVT selector
lever P)
0 V
44
(W)
Ground Horn relay control
Input
The horn is deactivated
Battery voltage
The horn is activated
0 V
45
(GR)
Ground Anti theft horn relay control
Input
The horn is deactivated
Battery voltage
The horn is activated
0 V
46
(BR)
Ground Starter relay control
Input
CVT selector lever in any position other
than P or N (ignition switch ON)
0 V
CVT selector lever P or N (ignition
switch ON)
Battery voltage
48
(W)
Ground A/C relay power supply
Output
Engine
running
A/C switch OFF
0 V
A/C switch ON
(A/C compressor is oper-
ating)
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-23
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
49
(R/B)
Ground ECM relay power supply
Output
Ignition switch OFF
(For a few seconds after turning ignition
switch OFF)
0 V
• Ignition switch ON
• Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)
Battery voltage
51
(LG)
Ground Ignition relay power supply
Output
Ignition switch OFF
0 V
Ignition switch ON
Battery voltage
52
(Y/G)
Ground Ignition relay power supply
Output
Ignition switch OFF
0 V
Ignition switch ON
Battery voltage
53
(R/W)
Ground ECM relay power supply
Output
Ignition switch OFF
(For a few seconds after turning ignition
switch OFF)
0 V
• Ignition switch ON
• Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)
Battery voltage
54
(G/W)
Ground
Throttle control motor re-
lay power supply
Output
Ignition switch OFF
(For a few seconds after turning ignition
switch OFF)
0 V
• Ignition switch ON
• Ignition switch OFF
(More than a few seconds after turn-
ing ignition switch OFF)
Battery voltage
55
(W/L)
Ground ECM power supply
Output
Ignition switch OFF
Battery voltage
56
(R/Y)
Ground Ignition relay power supply
Output
Ignition switch OFF
0 V
Ignition switch ON
Battery voltage
57
(O)
Ground Ignition relay power supply
Output
Ignition switch OFF
0 V
Ignition switch ON
Battery voltage
58
(Y)
Ground Ignition relay power supply
Output
Ignition switch OFF
0 V
Ignition switch ON
Battery voltage
69
(W/B)
Ground ECM relay control
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 - 1.5 V
70
(O)
Ground
Throttle control motor re-
lay control
Output
Ignition switch ON
→ OFF
0 -1.0 V
↓
Battery voltage
↓
0 V
Ignition switch ON
0 - 1.0 V
72
(R/B)
Ground
Transmission range switch
signal
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
0 V
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
Signal name
Input/
Output
+
−
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