Infiniti I35 (A33). Manual — part 199
SEC042D
ECM Terminals and Reference Value
NHEC0044
PREPARATION
NHEC0044S01
1.
ECM is located behind the instrument lower cover. For this
inspection, remove instrument lower cover.
2.
Remove ECM harness protector.
MEC486B
3.
Perform all voltage measurements with the connector con-
nected. Extend tester probe as shown to perform tests easily.
I
Open harness securing clip to make testing easier.
I
Use extreme care not to touch 2 pins at one time.
I
Data is for comparison and may not be exact.
ECM HARNESS CONNECTOR TERMINAL LAYOUT
NHEC0044S02
SEF970W
ECM INSPECTION TABLE
NHEC0044S03
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 the input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use ground other than the ECM terminals, such as
the ground.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ECM Terminals and Reference Value
EC-137
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
1
2
3
11
12
13
R/B
R/W
R/Y
R/L
L/W
PU/R
Injector No. 1
Injector No. 2
Injector No. 3
Injector No. 4
Injector No. 5
Injector No. 6
[Engine is running]
I
Warm-up condition
I
Idle speed
NOTE:
The pulse cycle changes depending on rpm at idle.
BATTERY VOLTAGE
(11 - 14V)
★
SEC984C
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,000 rpm.
BATTERY VOLTAGE
(11 - 14V)
★
SEC985C
4
W
Electronic controlled
engine mount-1
[Engine is running]
I
Idle speed (With engine stopped)
0 - 1V
[Engine is running]
I
Except above conditions
BATTERY VOLTAGE
(11 - 14V)
5
6
7
15
16
17
Y/R
G/R
L/R
GY
PU/W
GY/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
[Engine is running]
I
Warm-up condition
I
Idle speed
NOTE:
The pulse cycle changes depending on rpm at idle.
0 - 0.2V
★
SEC986C
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,500 rpm.
0.1 - 0.3V
★
SEC987C
8
G
Intake valve timing
control solenoid valve
(bank 2)
[Engine is running]
I
Warm-up condition
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,000 rpm.
7 - 12V
★
PBIB1790E
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ECM Terminals and Reference Value (Cont’d)
EC-138
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
9
L/W
Intake valve timing
control solenoid valve
(bank 1)
[Engine is running]
I
Warm-up condition
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,000 rpm.
7 - 12V
★
PBIB1790E
10
PU/R
EVAP canister purge
volume control sole-
noid valve
[Engine is running]
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
★
SEC990C
[Engine is running]
I
Engine speed is 2,000 rpm (More than 100 sec-
onds after starting engine).
BATTERY VOLTAGE
(11 - 14V)
★
SEC991C
14
W/R
Electronic controlled
engine mount-2
[Engine is running]
I
Idle speed (With engine stopped)
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Except above conditions
0 - 1V
18
PU/W
Engine coolant tem-
perature sensor sig-
nal output
[Engine is running]
I
Idle speed
0 - 12V
Output voltage varies with engine
coolant temperature.
21
B/R
Air conditioner relay
[Engine is running]
I
Both A/C switch and blower switch are ON
(Compressor is operating).
0 - 1.0V
[Engine is running]
I
A/C switch is OFF.
BATTERY VOLTAGE
(11 - 14V)
23
B/P
Fuel pump relay
[Ignition switch ON]
I
For 1 second after turning ignition switch ON
[Engine is running]
0 - 1.5V
[Ignition switch ON]
I
More than 1 second after turning ignition switch
ON
BATTERY VOLTAGE
(11 - 14V)
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ECM Terminals and Reference Value (Cont’d)
EC-139
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
24
Y
ASCD CRUISE lamp
[Ignition switch ON]
I
MAIN switch is ON.
0V
[Ignition switch ON]
I
MAIN switch is OFF.
BATTERY VOLTAGE
(11 - 14V)
25
R
ASCD SET lamp
[Engine is running]
I
SET/COAST switch is ON.
I
ASCD control is operating.
0V
[Engine is running]
I
SET/COAST or MAIN switch is OFF.
I
ASCD control is not operating.
BATTERY VOLTAGE
(11 - 14V)
26
OR
Throttle control motor
relay
[Ignition switch OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch ON]
0 - 1.0V
27
Y/G
VIAS control solenoid
valve
[Engine is running]
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Engine speed is between 1,800 and 3,600 rpm.
0 - 1.0V
28
OR/G
Vacuum cut valve
bypass valve
[Ignition switch ON]
BATTERY VOLTAGE
(11 - 14V)
30
PU
A/C cut signal
[Engine is running]
I
Air conditioner is operating.
0 - 0.5V
31
R
Counter current
return
[Ignition switch ON]
BATTERY VOLTAGE
(11 - 14V)
33
LG/B
MIL
[Ignition switch ON]
0 - 1.0V
[Engine is running]
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
34
W/G
Tachometer
[Engine is running]
I
Warm-up condition
I
Idle speed
NOTE:
The pulse cycle changes depending on rpm at idle.
7 - 8V
★
SEC992C
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,500 rpm.
7 - 8V
★
SEC032D
35
BR/R
Cooling fan relay
(LOW)
[Engine is running]
I
Cooling fan is operating.
0 - 1.0V
[Engine is running]
I
Cooling fan is not operating.
BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ECM Terminals and Reference Value (Cont’d)
EC-140
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