SSANGYONG Rexton Y200 Manual page 572

1F2-48 M161 ENGINE CONTROLS
Failure
Description
Code
Throttle position sensor
1 not plausible with
126
Throttle position sensor 2
High permanent throttle
127
signal
Mass air flow sensor
185
and throttle position
sensor failure
Circuit Description
The ECM supplies a 5 volt reference signal and a ground to the TP sensor. The TP sensor sends a voltage signal
back to the ECM relative to the throttle plate opening. The volt age signal will vary from approximately 0.3 ~ 0.9
volts at closed throttle, to over 4.0 ~ 4.6 volts at Wide Open Throttle (WOT).
The TP sensors serve for engine load control according to the drive pedal command. Load adjustments independent
of the drive pedal command can be implemented; such functions are, for instance, idle control, speed control,
drive slip control, load shock damping, and similar functions .
When the actuator current fails , the throttle valve is returned to emergency operating position by a spring. The
throttle valve position, there by the actuator drive position check back is provided by two potentiometers. The
motor positions the throttle valve against the return spring force. Motor and return spring are two separate energy
sources . Each of them is able to position the throttle valve in emergency position alone. Throttle valve position
check back and monitoring is provided by two actual value potentiometers connected to the engine control
electronics.
Throttle Actuator Inspection
1. Turn the ignition switch to "ON" position.
2. Measure the TPS 1 signal volt age at the ECM pin No. 87 and TPS 2 signal volt age at the ECM pin No. 85.
Pedal Position
Closed
TPS 1
Opened
Closed
TPS 2
Opened
Throttle Actuator DC Motor Inspection
1. Turn the ignition switch to "ON" position.
2. Measure the signal volt age between the ECM pin No. 67 and No. 68.
Application
Ignition "ON"
Engine
Status
Idling
Throttle Actuator DC Motor Resistance
1. Turn the ignition switch to "OFF" position.
2. Measure the resistance between the ECM pin No. 67 and No. 68.
Specified Value
Trouble Area
When difference between
TPS 1 and TPS 2
When failure of wiring
harness or actuator
When difference between
MAF and TPS signal
Specified Value
0.3 ~ 0.9 v
4.0 ~ 4.6 v
4.0 ~ 4.6 v
0.3 ~ 0.9 v
Specified Value
0.8 ~ 2.3 v
1.0 ~ 2.5 v
(Coolant temperature is
over 70° C)
< 10 Ω
Maintenance Hint
•
Monitoring the actual values through
scan tool
•
Inspection the ECM pin 84, 85, 87, 112,
67, 68 about short circuit or open with
bad contact
•
Inspection the throttle valve actuator
•
Inspection the ECM
SSANGYONG Y200