Nissan Maxima. Manual — part 513
EC-536
< ECU DIAGNOSIS INFORMATION >
[VQ35DE]
ECM
78
(R/L)
112
(B)
Intake valve timing control so-
lenoid valve (Bank 1)
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
7 - 12 V
79
(P/L)
112
(B)
Exhaust valve timing control
magnet retarder (Bank 1)
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• Around 2,500 rpm while the
engine speed is rising
7 - 12 V
80
(SB)
112
(B)
Exhaust valve timing control
magnet retarder (Bank 2)
Output
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
• Warm-up condition
• Around 2,500 rpm while the
engine speed is rising
7 - 12 V
81
(W)
84
(B)
Accelerator pedal position
sensor 1
Input
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully re-
leased
0.5 - 1.0 V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully de-
pressed
4.2 - 4.8 V
82
(O)
100
(G)
Accelerator pedal position
sensor 2
Input
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully re-
leased
0.25 - 0.5 V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully de-
pressed
2.0 - 2.5 V
83
(GR)
84
(B)
Sensor power supply
(Accelerator pedal position
sensor 1)
—
[Ignition switch: ON]
5 V
84
(B)
—
Sensor ground
(Accelerator pedal position
sensor 1)
—
—
—
Terminal No.
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0038GB
JMBIA0034GB
JMBIA0034GB
ECM
EC-537
< ECU DIAGNOSIS INFORMATION >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
85
(Y)
92
(BR)
ASCD steering switch
Input
[Ignition switch: ON]
• ASCD steering switch: OFF
4 V
[Ignition switch: ON]
• MAIN switch: Pressed
0 V
[Ignition switch: ON]
• CANCEL switch: Pressed
1 V
[Ignition switch: ON]
• RESUME/ACCELERATE
switch: Pressed
3 V
[Ignition switch: ON]
• SET/COAST switch: Pressed
2 V
86
(SB)
96
(GR)
EVAP control system pres-
sure sensor
Input
[Ignition switch: ON]
1.8 - 4.8 V
87
(BR)
100
(G)
Sensor power supply
(Accelerator pedal position
sensor 2)
—
[Ignition switch: ON]
5 V
88
(O)
—
Data link connector
Input/
Output
—
—
91
(V)
96
(GR)
Sensor power supply
(EVAP control system pres-
sure sensor)
—
[Ignition switch: ON]
5 V
92
(BR)
—
Sensor ground
(ASCD steering switch)
—
—
—
93
(Y)
112
(B)
Ignition switch
Input
[Ignition switch: OFF]
0 V
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
94
(GR)
112
(B)
Engine speed output signal
Output
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle
1 V
[Engine is running]
• Engine speed: 2,000 rpm
1 V
95
(Y)
104
(P)
Fuel tank temperature sensor
Input
[Engine is running]
0 - 4.8 V
Output voltage varies with fuel tank
temperature.
96
(GR)
—
Sensor ground
(EVAP control system pres-
sure sensor)
—
—
—
97
(P)
—
CAN communication line
Input/
Output
—
—
98
(L)
—
CAN communication line
Input/
Output
—
—
Terminal No.
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0076GB
JMBIA0077GB
EC-538
< ECU DIAGNOSIS INFORMATION >
[VQ35DE]
ECM
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
*1: This may vary depending on internal resistance of the tester.
*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
Fail safe
INFOID:0000000010095242
NON DTC RELATED ITEM
DTC RELATED ITEM
100
(G)
—
Sensor ground
(Accelerator pedal position
sensor 2)
—
—
—
102
(R)
112
(B)
PNP signal
Input
[Ignition switch: ON]
• Selector lever: P or N
BATTERY VOLTAGE
(11 - 14 V)
[Ignition switch: ON]
• Selector lever: Except above
0 V
104
(P)
—
Sensor ground
(Fuel tank temperature sen-
sor)
—
—
—
105
(V)
112
(B)
Power supply for ECM
Input
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
106
(SB)
112
(B)
Stop lamp switch
Input
[Ignition switch: OFF]
• Brake pedal: Fully released
0 V
[Ignition switch: OFF]
• Brake pedal: Slightly de-
pressed
BATTERY VOLTAGE
(11 - 14 V)
107
(B)
108
(B)
—
ECM ground
—
—
—
109
(W)
112
(B)
EVAP canister vent control
valve
Output
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
110
(G)
112
(B)
ASCD brake switch
Input
[Ignition switch: ON]
• Brake pedal: Slightly de-
pressed
0 V
[Ignition switch: ON]
• Brake pedal: Fully released
BATTERY VOLTAGE
(11 - 14 V)
111
(B)
112
(B)
—
ECM ground
—
—
—
Terminal No.
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
Engine operating condi-
tion in fail-safe mode
Detected items
Remarks
Reference
page
Engine speed will not
rise more than 2,500 rpm
due to the fuel cut
Malfunction indicator
lamp circuit
When there is an open circuit on MIL circuit, the ECM cannot warn the
driver by illuminating MIL when there is malfunction on engine control
system.
Therefore, when electrical controlled throttle and part of ECM related
diagnoses are continuously detected as NG for 5 trips, ECM warns the
driver that engine control system malfunctions and MIL circuit is open
by means of operating the fail-safe function.
The fail-safe function also operates when above diagnoses except MIL
circuit are detected and demands the driver to repair the malfunction.
ECM
EC-539
< ECU DIAGNOSIS INFORMATION >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
DTC No.
Detected items
Engine operating condition in fail-safe mode
P0011
P0021
Intake valve timing control
The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0014
P0024
Exhaust valve timing con-
trol
The signal is not energized to the exhaust valve timing control solenoid valve and the
magnet retarder control does not function.
P0101
P0102
P0103
Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118
Engine coolant tempera-
ture sensor circuit
Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT displays the engine coolant temperature decided by ECM.
Condition
Engine coolant temperature decided
(CONSULT display)
Just as ignition switch is turned ON
or START
40
°C (104°F)
Approx 4 minutes or more after en-
gine starting
80
°C (176°F)
Except as shown above
40 - 80
°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135
Throttle position sensor
The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
Therefore, the acceleration will be poor.
P0196
P0197
P0198
Engine oil temperature
sensor
Intake valve timing control does not function.
P0500
Vehicle speed sensor
The cooling fan operates (Highest) while engine is running.
P0605
ECM
(When ECM calculation function is malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
ECM deactivates ASCD operation.
P0643
Sensor power supply
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1805
Brake switch
ECM controls the electric throttle control actuator by regulating the throttle opening to a
small range.
Therefore, acceleration will be poor.
Vehicle condition
Driving condition
When engine is idling
Normal
When accelerating
Poor acceleration
P2100
P2103
Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2101
Electric throttle control
function
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118
Throttle control motor
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
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