Nissan Altima L32. Instruction — part 598
ECM
EC-1513
< ECU DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
COOLING FAN
• Engine: After warming up, idle the
engine
• Air conditioner switch: OFF
Engine coolant temperature: 97
°C
(206
°F) or less
OFF
Engine coolant temperature: Between
98
°C (208°F) and 99°C (210°F)
Low
Engine coolant temperature: Between
100
°C (212°F) and 104°C (219°F)
Mid
Engine coolant temperature: 105
°C
(221
°F) or more
Hi
HO2S2 HTR (B1)
• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
ON
• Engine speed: Above 3,600 rpm
OFF
HO2S2 HTR (B2)
• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
ON
• Engine speed: Above 3,600 rpm
OFF
VEHICLE SPEED
• Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.
Almost the same speed as
the speedometer indication
IDL A/V LEARN
• Engine: Running
Idle air volume learning has not been per-
formed yet.
YET
Idle air volume learning has already been
performed successfully.
CMPLT
ENG OIL TEMP
• Engine: After warming up
More than 70
°C (158°F)
TRVL AFTER MIL
• Ignition switch: ON
Vehicle has traveled after MIL has illumi-
nated.
0 - 65,535 km
(0 - 40,723 miles)
A/F S1 HTR (B1)
• Engine: After warming up, idle the engine
(More than 140 seconds after starting engine)
4 - 100%
A/F S1 HTR (B2)
• Engine: After warming up, idle the engine
(More than 140 seconds after starting engine)
4 - 100%
AC PRESS SEN
• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)
1.0 - 4.0 V
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.
Almost the same speed as
the speedometer indication
SET VHCL SPD
• Engine: Running
ASCD: Operating
The preset vehicle speed is
displayed
MAIN SW
• Ignition switch: ON
MAIN switch: Pressed
ON
MAIN switch: Released
OFF
CANCEL SW
• Ignition switch: ON
CANCEL switch: Pressed
ON
CANCEL switch: Released
OFF
RESUME/ACC SW
• Ignition switch: ON
RESUME/ACCELERATE switch:
Pressed
ON
RESUME/ACCELERATE switch: Re-
leased
OFF
SET SW
• Ignition switch: ON
SET/COAST switch: Pressed
ON
SET/COAST switch: Released
OFF
Monitor Item
Condition
Values/Status
EC-1514
< ECU DIAGNOSIS >
[VQ35DE]
ECM
*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.
*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
• ECM is located in the engine room left side near battery.
• Specification data are reference values.
• Pulse signal is measured by CONSULT-III.
BRAKE SW1
(ASCD brake switch)
• Ignition switch: ON
• Brake pedal: Fully released (CVT)
• Brake pedal and clutch pedal: Fully re-
leased (M/T)
ON
• Brake pedal: Slightly depressed (CVT)
• Brake pedal and clutch pedal: Slightly
depressed (M/T)
OFF
BRAKE SW2
(Stop lamp switch)
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
VHCL SPD CUT
• Ignition switch: ON
NON
LO SPEED CUT
• Ignition switch: ON
NON
AT OD MONITOR
• Ignition switch: ON
OFF
AT OD CANCEL
• Ignition switch: ON
OFF
CRUISE LAMP
• Ignition switch: ON
MAIN switch: Pressed at the 1st time
→
at the 2nd time
ON
→ OFF
SET LAMP
• MAIN switch: ON
• When vehicle speed is between
40 km/h (25 MPH) and 144 km/h
(89 MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
ALT DUTY
• Engine: Idle
0 - 80%
A/F ADJ-B1
• Engine: Running
−0.330 - 0.330
A/F ADJ-B2
• Engine: Running
−0.330 - 0.330
BAT CUR SEN
• Engine speed: Idle
• Battery: Fully charged*
2
• Selector lever position: P or N (CVT), neutral (M/T)
• Air conditioner switch: OFF
• No load
Approx. 2,600 - 3,500 mV
ALT DUTY SIG
• Power generation voltage variable control: Operating
ON
• Power generation voltage variable control: Not operating
OFF
Monitor Item
Condition
Values/Status
PBIA9221J
ECM
EC-1515
< ECU DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Terminal No.
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
1
(P/B)
112
(B)
Fuel injector No. 6
Output
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle
BATTERY VOLTAGE
(11 - 14 V)
3
(L/W)
Fuel injector No. 5
29
(LG/R)
Fuel injector No. 4
30
(R/Y)
Fuel injector No. 3
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14 V)
31
(R/W)
Fuel injector No. 2
32
(R/B)
Fuel injector No. 1
2
(G/W)
112
(B)
Throttle control motor power
supply
Input
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
4
(BR/Y)
112
(B)
A/F sensor 1 heater
(bank 1)
Output
[Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after
starting engine)
2.9 - 8.8 V
5
(L)
112
(B)
Throttle control motor (Open)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever position: D
(CVT), 1st (M/T)
• Accelerator pedal: Fully de-
pressed
0 - 14 V
[Ignition switch: ON]
• Engine stopped
• Selector lever position: D
(CVT), 1st (M/T)
• Accelerator pedal: Fully re-
leased
0 - 14 V
6
(P)
112
(B)
Throttle control motor (Close)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever position: D
(CVT), 1st (M/T)
• Accelerator pedal: Fully re-
leased
0 - 14 V
JMBIA0047GB
JMBIA0048GB
JMBIA0902GB
JMBIA0031GB
JMBIA0032GB
JMBIA1125GB
EC-1516
< ECU DIAGNOSIS >
[VQ35DE]
ECM
8
(SB)
112
(B)
A/F sensor 1 heater (bank 2)
Output
[Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after
starting engine)
2.9 - 8.8 V
9
(L/B)
112
(B)
Ignition signal No. 3
Output
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle
0 - 0.2 V
10
(G/R)
Ignition signal No. 2
11
(Y/R)
Ignition signal No. 1
18
(GR/R)
Ignition signal No. 6
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
0.1 - 0.4 V
19
(P/W)
Ignition signal No. 5
21
(GR/W)
Ignition signal No. 4
12
(B)
—
ECM ground
—
—
—
13
(P/Y)
112
(B)
Heated oxygen sensor 2 heat-
er (bank 1)
Output
[Engine is running]
• Engine speed: Below 3,600
rpm after the following condi-
tions are met
- Engine: after warming up
- Keeping the engine speed be-
tween 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load
10 V
[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600
rpm
BATTERY VOLTAGE
(11 - 14 V)
14
(B/R)
112
(B)
Fuel pump relay
Output
[Ignition switch: ON]
• For 1 second after turning ig-
nition switch ON
[Engine is running]
0 - 1.5 V
[Ignition switch: ON]
• More than 1 second after turn-
ing ignition switch ON
BATTERY VOLTAGE
(11 - 14 V)
15
(O)
112
(B)
Throttle control motor relay
Output
[Ignition switch: ON
→ OFF]
0 - 1.0 V
↓
BATTERY VOLTAGE (11 - 14 V)
↓
0 V
[Ignition switch: ON]
0 - 1.0 V
16
(B)
—
ECM ground
—
—
—
Terminal No.
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0030GB
JMBIA0035GB
JMBIA0036GB
JMBIA0902GB
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