User Manual - Page 761

For 2001 XTERRA.

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ECM Terminals and Reference Value
=NGEC0597
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than the ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION DATA (DC Voltage)
23 L Throttle position sensor
[Engine is running]
Warm-up condition
Accelerator pedal fully released
0.15 - 0.85V
[Ignition switch ON]
Accelerator pedal fully depressed
3.5 - 4.7V
42 B/W Sensors power supply [Ignition switch ON] Approximately 5V
43 BR Sensors ground
[Engine is running]
Warm-up condition
Idle speed
Approximately 0V
On Board Diagnosis Logic
NGEC0598
Malfunction is detected when
(Malfunction A) an excessively low or high voltage from the sensor
is sent to ECM,
(Malfunction B) a high voltage from the sensor is sent to ECM
under light load driving conditions,
(Malfunction C) a low voltage from the sensor is sent to ECM under
heavy load driving conditions.
POSSIBLE CAUSE
NGEC0598S01
Malfunction A
NGEC0598S0101
Harness or connectors
(The throttle position sensor circuit is open or shorted.)
Throttle position sensor
Malfunction B
NGEC0598S0102
Harness or connectors
(The throttle position sensor circuit is open or shorted.)
Throttle position sensor
Fuel injector
Camshaft position sensor
Mass air flow sensor
Malfunction C
NGEC0598S0103
Harness or connectors
(The throttle position sensor circuit is open or shorted.)
Intake air leaks
Throttle position sensor
FAIL-SAFE MODE
NGEC0598S02
When the malfunctionAis detected, the ECM enters fail-safe mode
and the MIL lights up.
DTC P0120 THROTTLE POSITION SENSOR
VG33E
ECM Terminals and Reference Value
EC-761
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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