ECM SYSTEM
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM
1-150
DTC 123-TPS1 Signal Voltage High
• Hardware: Throttle Body-Throttle Position Sensor 1
• Enabling Conditions: Engine running
• Set Conditions: TPS1 sensor voltage higher than 4.80 V for longer than 0.5 seconds
• Corrective Action(s): Illuminate MIL, shutdown engine
• Emissions related fault
• Possible Causes: 5.00 V reference feed (5 V_ext1) shorted to voltage, Open sensor ground (5 Vrtn1) circuit,
signal wire shorted to voltage or bad TPS in throttle body
DTC 221-TPS1 % Higher Than TPS2 %
• Hardware: Throttle Body-Throttle Position Sensor 1 & 2 relationship
• Enabling Conditions: Key-On, Engine Cranking, or Running
• Set Conditions: TPS1 % higher than TPS2 % by more than 20 % for longer than 1 second
• Corrective Action(s): Illuminate MIL, activate engine shutdown
• Non-emissions related fault
• Possible Causes: TPS1 or TPS2 out of calibration in throttle body, unwanted resistance in either TPS1 or TPS2
signal circuits, unwanted resistance in either the shared reference feed (5 V_ext1) or shared sensor ground
(5 vrtn1), bad ECM
DTC 222-TPS2 Signal Voltage Low
• Hardware: Throttle Body-Throttle Position Sensor 2 (electronic throttle body only)
• Enabling Condition: Key-On, Engine Off
• Set Condition: TPS2 sensor voltage lower 0.200 V for longer than 0.5 seconds
• Corrective Action(s): Illuminate MIL, activate engine shutdown
• Emissions related fault
• Possible Causes: Loss of 5.00 V reference feed, open or shorted to ground signal circuit, open or shorted to
ground TPS in throttle body, bad ECM
DTC 223-TPS2 Signal Voltage High
• Hardware: Throttle Body-Throttle Position Sensor 2 (electronic throttle body only)
• Enabling Conditions: Engine running
• Set Conditions: TPS2 sensor voltage higher than 4.80 V for longer than 0.5 seconds
• Corrective Action(s): Illuminate MIL, activate engine shutdown
• Emissions related fault
• Possible Causes: 5.00 V reference feed (5 V_ext1) shorted to voltage, Open sensor ground (5 Vrtn1) circuit,
signal wire shorted to voltage or bad TPS in throttle body
The throttle controls the airflow through the engine, directly affecting the power output of the engine. When the
throttle is electronically controlled in an Electronic Throttle Body it can be used to control the idle stability and limit
engine speed based on operating conditions.
Each Throttle Position Sensor uses a variable resistor and voltage divider circuit to determine throttle plate
position, and is located within the throttle body. The output of the TPS is linear with angular position. The TPS input(s)
provide angular position feedback of the throttle plate. In an Electronic Throttle Body multiple position feedback
sensors (usually two counteracting potentiometers) are used to perform speed governing with improved safety and
redundancy.
DTC 2111: Unable to Reach Lower TPS
• Hardware: Throttle Position Sensor
• Enabling Conditions: Cranking or Running
• Set Conditions: Throttle command is 20 % less than throttle position for 0.2 seconds or longer
• Corrective Action(s): Turn on MIL, activate engine shut down
• Emissions related fault
• Possible Causes: Follow at DTC 2112
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