Infiniti QX56 (Z62). Manual — part 966
PCS-20
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
IPDM E/R
50
(LG/B)
Ground
Headlamp HI (LH)
Output
Lighting
switch 2ND or
AUTO (Light
is illuminated)
Lighting switch other than
H and PASS
0 V
• Lighting switch HI
• Lighting switch PASS
Battery voltage
51
(BR/Y)
Ground
Headlamp LO (LH)
Output
Lighting switch OFF
0 V
Lighting switch 2ND or AUTO (light is illu-
minated)
Battery voltage
52
(W)
Ground
Headlamp LO (RH)
Output
Lighting switch OFF
0 V
Lighting switch 2ND or AUTO (light is illu-
minated)
Battery voltage
54
(SB)
Ground
ECM power supply
Output
Approximately 1 second or more than after
turning the ignition switch ON
0 V
• Approximately 1 second after turning
the ignition switch ON
• Engine running
Battery voltage
55
(O)
Ground
Throttle control motor
relay power supply
Output
Ignition switch OFF
(More than a few seconds after turning ig-
nition switch OFF)
0 V
• Ignition switch ON
• Ignition switch OFF
(For a few seconds after turning ignition
switch OFF)
Battery voltage
56
(L)
Ground
A/C compressor power
supply
Output
Engine run-
ning
A/C switch OFF
0 V
A/C switch ON
(A/C compressor is oper-
ating)
Battery voltage
57
(V)
Ground
Ignition relay power
supply
Output
Ignition switch OFF or ACC
0 V
Ignition switch ON
Battery voltage
58
(BR/R)
Ground
Ignition relay power
supply
Output
Ignition switch OFF or ACC
0 V
Ignition switch ON
Battery voltage
59
(W/B)
Ground
Ignition relay power
supply
Output
Ignition switch OFF or ACC
0 V
Ignition switch ON
Battery voltage
60
(V/R)
Ground
Throttle control motor
relay control
Output
Ignition switch ON
→
OFF
0 - 1.0 V
↓
Battery voltage
↓
0 V
Ignition switch ON
0 - 1.0 V
61
(W)
Ground
Ignition relay power
supply
Output
Ignition switch OFF or ACC
0 V
Ignition switch ON
Battery voltage
62
(SB)
Ground
Ignition relay power
supply
Output
Ignition switch OFF or ACC
0 V
Ignition switch ON
Battery voltage
63
(P)
Ground
Steering lock unit con-
dition-2
Input
Steering lock is unlocked
0 V
Steering lock is locked
12 V
64
(G/Y)
Ground
A/T shift selector
(detention switch)
Input
Ignition switch
ON
Select lever P
0 V
Select lever in any posi-
tion other than P
12 V
65
(L)
Ground
Steering lock unit con-
dition-1
Input
Steering lock is unlocked
12 V
Steering lock is locked
0 V
Terminal NO.
(Wire color)
Description
Condition
Value
(Approx.)
Signal name
Input/
Output
+
–
PCS
IPDM E/R
PCS-21
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
Fail-Safe
INFOID:0000000006220173
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
If No CAN Communication Is Available With BCM
66
(SB)
Ground
Push-button ignition
switch
Input
Press the push-button ignition switch
0 V
Release the push-button ignition switch
12 V
68
(O)
Ground
Ignition relay monitor
Input
Ignition switch OFF or ACC
12 V
Ignition switch ON
0 V
69
(W/B)
Ground
Ignition power supply
Output
Ignition switch OFF or ACC
0 V
Ignition switch ON
Battery voltage
72
(Y/R)
Ground
Cooling fan control
Output
Ignition switch
OFF
5 V
ACC
0 V
ON
2. 5 V
Engine running
Terminal NO.
(Wire color)
Description
Condition
Value
(Approx.)
Signal name
Input/
Output
+
–
JMMIA0404GB
Control part
Fail-safe operation
Cooling fan
• Transmits the pulse duty signal (PWM signal) 100% when the ignition switch is turned ON.
• Transmits the pulse duty signal (PWM signal) 0% when the ignition switch is turned OFF.
A/C compressor
A/C relay OFF
Alternator
Transmits the power generation command signal (PWM signal) 0%
Control part
Fail-safe 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 lamp
• License plate lamp
• Illumination
• Tail lamp
• Side marker lamp
• 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 motor
• 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 con-
trol is activated while the front wiper is set in the INT mode and the front wiper motor is op-
erating.
• Return automatically wiper to stop position when ignition switch is turned ON if fail-safe con-
trol is activated while front wiper motor is operated and wiper stops in the other position than
stop position.
Front fog lamp
Front fog lamp relay OFF
Horn
Horn OFF
PCS-22
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
IPDM E/R
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.
FRONT WIPER PROTECTION FUNCTION
IPDM E/R detects front wiper stop position by a front wiper stop position signal.
When a front wiper stop position signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 seconds activation and 20 seconds stop.
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.
DTC Index
INFOID:0000000006220174
NOTE:
• The details of time display are as follows.
- CRNT: A malfunction is detected now.
- PAST: A malfunction was detected in the past.
• IGN counter is displayed on FFD (Freeze Frame data).
- The number is 0 when is detected now.
- The number increases like 1
→
2 ··· 38
→
39 after returning to the normal condition whenever IGN OFF
→
ON.
- The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.
×
: Applicable
Ignition relay
The status just before activation of fail-safe is maintained.
Starter motor
Starter control relay OFF
Steering lock unit
Steering lock relay OFF
Control part
Fail-safe operation
Voltage judgment
IPDM E/R judgment
Operation
Ignition relay contact side
Ignition relay excitation coil
side
ON
ON
Ignition relay ON normal
—
OFF
OFF
Ignition relay OFF normal
—
ON
OFF
Ignition relay ON stuck
• Detects DTC “B2098: IGN RELAY ON”
• Turns ON the tail lamp relay for 10 min-
utes
OFF
ON
Ignition relay OFF stuck
Detects DTC “B2099: IGN RELAY OFF”
Ignition switch
Front wiper switch
Front wiper stop position signal
ON
OFF
The front wiper stop position signal (stop position) cannot be input for
10 seconds.
ON
The front wiper stop position signal does not change for 10 seconds.
CONSULT display
Fail-safe
Refer to
No DTC is detected.
further testing
may be required.
—
—
U1000: CAN COMM CIRCUIT
×
B2098: IGN RELAY ON
×
PCS
IPDM E/R
PCS-23
< ECU DIAGNOSIS INFORMATION >
[IPDM E/R]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
B2099: IGN RELAY OFF
—
B209F: CRANK REQ CIR OPEN
—
B20A0: CRANK REQ CIR SHORT
—
B2108: S/L RELAY ON
—
B2109: S/L RELAY OFF
—
B210A: S/L STATE SW
—
B210B: PNP RLY ON
—
B210C: PNP RLY OFF
—
B210D: STARTER RELAY ON
—
B210E: STARTER RELAY OFF
—
B210F: INTRLCK/PNP SW ON
—
B2110: INTRLCK/PNP SW OFF
—
CONSULT display
Fail-safe
Refer to
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