Infiniti M45 (Y34). Manual — part 352
TROUBLE DIAGNOSIS
EC-97
C
D
E
F
G
H
I
J
K
L
M
A
EC
TBWA0259E
EC-98
TROUBLE DIAGNOSIS
ECM Harness Connector Terminal Layout
ABS002DS
ECM Terminals and Reference Value
ABS002DT
PREPARATION
1.
ECM is located behind the glove box. For this inspection,
remove glove box.
2.
Remove ECM harness protector.
3.
Perform all voltage measurements with the connector con-
nected. Extend tester probe as shown to perform tests easily.
●
Open harness securing clip to make testing easier.
●
Use extreme care not to touch 2 pins at one time.
●
Data is for comparison and may not be exact.
ECM INSPECTION TABLE
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
PBIB0075E
PBIB0028E
MEC486B
TROUBLE DIAGNOSIS
EC-99
C
D
E
F
G
H
I
J
K
L
M
A
EC
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
5
6
7
13
14
15
16
17
B/W
L
BR
P
OR/L
B/R
OR
G
Injector No. 1
Injector No. 2
Injector No. 3
Injector No. 4
Injector No. 5
Injector No. 6
Injector No. 7
Injector No. 8
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
8
BR
Heated oxygen sensor 1
heater (bank 1)
[Engine is running]
●
Warm-up condition
●
Engine speed: Below 3,000 rpm.
Approximately 7V
[Engine is running]
●
Engine speed: Above 3,000 rpm.
BATTERY VOLTAGE
(11 - 14V)
9
G/Y
Heated oxygen sensor 1
heater (bank 2)
[Engine is running]
●
Warm-up condition
●
Engine speed: Below 3,000 rpm.
Approximately 7V
[Engine is running]
●
Engine speed: Above 3,000 rpm.
BATTERY VOLTAGE
(11 - 14V)
10
GY
Heated oxygen sensor 2
heater (bank 1)
[Engine is running]
●
Engine speed is below 3,600 rpm after the
following conditions are met.
–
Warm-up condition
–
Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load
0 - 1.0V
[Ignition switch: ON]
●
Engine stopped
[Engine is running]
●
Engine speed: Above 3,600 rpm.
BATTERY VOLTAGE
(11 - 14V)
PBIB0042E
PBIB0043E
PBIB0519E
PBIB0519E
EC-100
TROUBLE DIAGNOSIS
11
G
Heated oxygen sensor 2
heater (bank 2)
[Engine is running]
●
Engine speed is below 3,600 rpm after the
following conditions are met.
–
Warm-up condition
–
Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load
0 - 1.0V
[Ignition switch: ON]
●
Engine stopped
[Engine is running]
●
Engine speed: Above 3,600 rpm.
BATTERY VOLTAGE
(11 - 14V)
12
W/L
Counter current return
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
18
19
20
21
29
30
31
32
Y/R
W/G
GY
W/R
GY/R
PU/W
L/R
G/R
Ignition signal No. 1
Ignition signal No. 2
Ignition signal No. 3
Ignition signal No. 4
Ignition signal No. 5
Ignition signal No. 6
Ignition signal No. 7
Ignition signal No. 8
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.
0 - 0.1V
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,000 rpm.
0 - 0.2V
24
G/W
Air conditioner relay
[Engine is running]
●
Both A/C switch and blower switch: ON
(Compressor operates).
0 - 1.0V
[Engine is running]
●
A/C switch: OFF.
BATTERY VOLTAGE
(11 - 14V)
25
B/R
Fuel pump control module
[When cranking engine]
0 - 0.5V
[Engine is running]
●
Warm-up condition
●
Idle speed
8 - 12V
26
OR
Throttle control motor relay
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
0 - 1.0V
27
PU
VIAS control solenoid valve
[Engine is running]
●
Selector lever: P or N
0 - 1.0V
[Engine is running]
●
Selector lever: D
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Engine speed: Above 5,000 rpm
0 - 1.0V
28
L
Cooling fan speed control
solenoid valve ground
[Engine is running]
Approximately 0V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB0044E
PBIB0045E
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