Nissan Titan A60. Manual - part 351
EC-70
< ECU DIAGNOSIS INFORMATION >
[VK56DE]
ECM
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
*:Before measuring the terminal voltage, confirm that the battery is fully charged.
Fail-Safe Chart
INFOID:0000000006158946
When the DTC listed below is detected, the ECM enters fail-safe mode and the MIL lights up.
115
116
B
B/W
ECM ground
[Engine is running]
• Idle speed
Body ground
117
L/Y
EVAP canister vent control
valve
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
119
120
BR
BR
Power supply for ECM
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
121
W
Power supply for ECM
(Back-up)
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
DTC No.
Detected items
Engine operating condition in fail-safe mode
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-III displays the engine coolant temperature decided by ECM.
Condition
Engine coolant temperature decided
(CONSULT-III display)
Just as ignition switch is turned ON
or START
40
°C (104°F)
Approx. 4 minutes or more after
engine 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.
So, the acceleration will be poor.
P0500
Vehicle speed sensor
The cooling fan operates (Highest) while engine is running.
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.
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.