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WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM
DTC 2112: Unable to Reach Higher TPS
• Hardware: Throttle Position Sensor
• Enabling Conditions: Cranking or Running
• Set Conditions: Throttle command is 20 % more than actual throttle position
• Corrective Action(s): MIL-On during active fault, Adaptive-Enabled, Closed Loop-Enabled, Engine Shut Down
• Emissions related fault
• Possible Causes:
There are 2 Throttle Position Sensors located within the throttle which use variable resistors to determine signal
voltage based on throttle plate position. TPS1 will read low voltage when closed and TPS2 will read high voltage when
closed. The TPS1 and TPS2 % ages are calculated from these voltages. Although the voltages are different, the
calculated values for the throttle position % ages should be very close to the same. The TPS values are used by the
ECM to determine if the throttle is opening as commanded.
The DBW motor is a 2 wire DC motor that is PWM controlled by the ECM. Neither of these wires is watched by
the ECM for electrical problems. DTCs 2111 and 2112 usually indicate that the ECM has lost control of the motor due
to an electrical problem with the motor or a mechanical problem with the motor.
This fault of DTC 2111 will set if the throttle command is 20 % lower or more than the actual throttle position.
During this active fault the MIL light will be on and the engine will shut down.
This fault of DTC 2112 will set if the throttle command is 20 % lower or more than the actual throttle position.
During this active fault the MIL light will be on and the engine will shut down.
DTC 2135-TPS1/2 Simultaneous Voltages Out-of-Range
• Hardware: Electronic throttle body
• Enabling Conditions: Key On, Engine Cranking or Running
• Set Condition: TPS1 and TPS2 voltages are both simultaneously out-of-range for longer than 0.5 seconds
• Corrective Action(s): Illuminate MIL and shutdown engine
• Non-emissions related fault
• Possible Causes: Loss of 5.00 V feed to both sensors, loss of ground (5 V_rtn1) to both sensors, problem with
both TPSs at the same time
The throttle is an air valve used to control the amount of air available to the engine for combustion and thereby
the engine's power output. An electronic throttle simply means that a motor is controlled electronically through an
electronic control system to actuate the throttle valve. Electronic throttle control is advantageous because it tends to
offer improved starting, improved idle governing, improved maximum speed governing, excellent load acceptance
and steady-state speed governing, permits engine synchronization, and offers flexibility to protect the engine during
certain fault conditions.
This fault is generated when both feedback sensors in the ETB (TPS1 and TPS2) simultaneously produce
out-of-range faults. This fault indicates that there is no feedback of the throttle valve and as a result throttle control
cannot take place.
1-151
ECM SYSTEM
KiSC issued 12, 2016 A
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