Nissan Maxima. Manual — part 509
EC-520
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
VARIABLE INDUCTION AIR SYSTEM
Power valve 2>>GO TO 6.
2.
CHECK VACUUM EXISTENCE-I
With CONSULT
1. Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2. Start engine and let it idle.
3. Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT.
4. Turn VIAS control solenoid valve 1 “ON” and “OFF”, and check vacuum existence under the following con-
ditions.
Without CONSULT
1. Stop engine and disconnect vacuum hose connected to power valve actuator 1.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Start engine.
4. When revving engine up to 5,000 rpm quickly.
5. Check vacuum existence under the following conditions.
Is the inspection result normal?
YES
>> Repair or replace power valve actuator 1. Refer to
EC-38, "Component Parts Location"
NO
>> GO TO 3.
3.
CHECK VACUUM TANK
1. Stop engine and disconnect vacuum hose connected to intake manifold collector.
2. Start engine and let it idle.
3. Check vacuum existence from intake manifold collector.
Does vacuum existence from the intake manifold collector?
YES
>> GO TO 4.
NO
>> Replace intake manifold collector. Refer to
EM-25, "Removal and Installation"
.
4.
CHECK VACUUM HOSE
1. Stop engine.
2. Check vacuum hose for cracks, clogging, improper connection
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair hoses or tubes.
5.
CHECK VIAS CONTROL SOLENOID VALVE 1
EC-443, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace VIAS control solenoid valve 1. Refer to
EC-38, "Component Parts Location"
.
6.
CHECK VACUUM EXISTENCE-II
VIAS S/V 1
Vacuum
ON
Existed
OFF
Not existed
Condition
Operation
Idle
Existed
When revving engine up to 5,000 rpm quickly
Not existed
SEF109L
VARIABLE INDUCTION AIR SYSTEM
EC-521
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
With CONSULT
1. Stop engine and disconnect vacuum hose connected to power valve actuator 2.
2. Start engine and let it idle.
3. Perform “VIAS S/V-2” in “ACTIVE TEST” mode with CONSULT.
4. Turn VIAS control solenoid valve 2 “ON” and “OFF”, and check vacuum existence under the following con-
ditions.
Without CONSULT
1. Stop engine and disconnect vacuum hose connected to power valve actuator 2.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Start engine.
4. When revving engine up to 5,000 rpm quickly.
5. Check vacuum existence under the following conditions.
Is the inspection result normal?
YES
>> Repair or replace power valve actuator 2. Refer to
EC-38, "Component Parts Location"
NO
>> GO TO 7.
7.
CHECK VACUUM HOSE
1. Stop engine.
2. Check vacuum hose for cracks, clogging, improper connection
or disconnection. Refer to
.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair hoses or tubes.
8.
CHECK VIAS CONTROL SOLENOID VALVE 2
EC-446, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace VIAS control solenoid valve 2. Refer to
EC-38, "Component Parts Location"
.
9.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
.
>> INSPECTION END
VIAS S/V 2
Vacuum
ON
Existed
OFF
Not existed
Condition
Operation
Idle
Existed
When revving engine up to 5,000 rpm quickly
Not existed
SEF109L
EC-522
< ECU DIAGNOSIS INFORMATION >
[VQ35DE]
ECM
ECU DIAGNOSIS INFORMATION
ECM
Reference Value
INFOID:0000000010095241
VALUES ON THE DIAGNOSIS TOOL
NOTE:
• The following table includes information (items) inapplicable to this vehicle. For information (items) applica-
ble to this vehicle, refer to CONSULT display items.
• Numerical values in the following table are reference values.
• These values are input/output values that ECM receives/transmits and may differ from actual operations.
Example: The ignition timing shown by the timing light may differ from the ignition timing displayed on the data
monitor. This occurs because the timing light shows a value calculated by ECM according to signals received
from the cam shaft position sensor and other sensors related to ignition timing.
For outlines of following items, refer to
.
Monitor Item
Condition
Values/Status
ENG SPEED
Run engine and compare CONSULT value with the tachometer indication.
Almost the same speed as
the tachometer indication.
MAS A/F SE-B1
.
B/FUEL SCHDL
.
A/F ALPHA-B1
.
A/F ALPHA-B2
.
COOLAN TEMP/S
• Engine: After warming up
More than 70
°C (158°F)
A/F SEN1 (B1)
• Engine: After warming up
Maintaining engine speed at 2,000 rpm
Fluctuates around 2.2 V
A/F SEN1 (B2)
• Engine: After warming up
Maintaining engine speed at 2,000 rpm
Fluctuates around 2.2 V
HO2S2 (B1)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
0 - 0.3 V
←→ Approx. 0.6 -
1.0 V
HO2S2 (B2)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
0 - 0.3 V
←→ Approx. 0.6 -
1.0 V
HO2S2 MNTR (B1)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
LEAN
←→ RICH
HO2S2 MNTR (B2)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
LEAN
←→ RICH
VHCL SPEED SE
• Turn drive wheels and compare CONSULT value with the speedometer indi-
cation.
Almost the same speed as
speedometer indication
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14 V
ACCEL SEN 1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.5 - 1.0 V
Accelerator pedal: Fully depressed
4.2 - 4.8 V
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.5 - 1.0 V
Accelerator pedal: Fully depressed
4.2 - 4.8 V
ECM
EC-523
< ECU DIAGNOSIS INFORMATION >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
TP SEN 1-B1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
TP SEN 2-B1*
1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
FUEL T/TMP SE
• Ignition switch: ON
Indicates fuel tank tempera-
ture
INT/A TEMP SE
• Ignition switch: ON
Indicates intake air tempera-
ture
EVAP SYS PRES
• Ignition switch: ON
Approx. 1.8 - 4.8 V
FUEL LEVEL SE
• Ignition switch: ON
Depending on fuel level of
fuel tank
START SIGNAL
• Ignition switch: ON
→ START → ON
OFF
→ ON → OFF
CLSD THL POS
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
ON
Accelerator pedal: Slightly depressed
OFF
AIR COND SIG
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates.)
ON
P/N POSI SW
• Ignition switch: ON
Selector lever: P or N
ON
Selector lever: Except above
OFF
PW/ST SIGNAL
• Engine: After warming up, idle the
engine
Steering wheel: Not being turned
OFF
Steering wheel: Being turned
ON
LOAD SIGNAL
• Ignition switch: ON
Rear window defogger switch: ON
and/or
Lighting switch: 2nd position
ON
Rear window defogger switch and lighting
switch: OFF
OFF
IGNITION SW
• Ignition switch: ON
→ OFF → ON
ON
→ OFF → ON
HEATER FAN SW
• Engine: After warming up, idle the
engine
Heater fan switch: ON
ON
Heater fan switch: OFF
OFF
BRAKE SW
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
INJ PULSE-B1
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
INJ PULSE-B2
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
IGN TIMING
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
7
° - 17° BTDC
2,000 rpm
25
° - 45° BTDC
CAL/LD VALUE
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
5% - 35%
2,500 rpm
5% - 35%
MASS AIRFLOW
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
2.0 - 6.0 g/s
2,500 rpm
7.0 - 20.0 g/s
Monitor Item
Condition
Values/Status
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