G240070T8 - G240070T14

C : DTC P0121

G240070t8 : CHECK THE POWER SUPPLY TO THE THROTTLE POSITION SENSOR
1. Turn the ignition switch the to the RUN position.
2. Measure the voltage between the throttle position sensor electrical connector PI 26 pin 4 (OY) and ground.

- Is the voltage less than 4.5 volts?

-> Yes
Goto [G240070t9]

-> No
Goto [G240070t11]

G240070t9 : CHECK THE THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
1. Turn the ignition switch to the OFF position.
2. Disconnect the ECM electrical connector PI 1 and the throttle position sensor electrical connector PI 26.
3. Measure the resistance between PI 1 pin 12 (OY) and PI 26 pin 4 (OY).

- Is the resistance less than 5 ohms?

-> Yes
Goto [G240070t10]

-> No
REPAIR the throttle position sensor power supply circuit from the ECM to the throttle position sensor. CLEAR the DTC. TEST the system for normal operation.

G240070t10 : CHECK THE THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance between PI 26-pin 4 (OY) and ground.

- Is the resistance greater than 10,000 ohms?

-> Yes
DIAGNOSE the electronic engine control system.

-> No
REPAIR the throttle position sensor power supply circuit from the ECM to the throttle position sensor. CLEAR the DTC. TEST the system for normal operation.

G240070t11 : CHECK THE THROTTLE POSITION SENSOR GROUND CIRCUIT
1. Turn the ignition switch to the OFF position.
2. Disconnect the throttle position sensor electrical connector PI 26.
3. Measure the resistance between PI 26 pin 1 (BG) and ground.

- Is the resistance less than 5 ohms?

-> Yes
Goto [G240070t13]

-> No
Goto [G240070t12]

G240070t12 : CHECK THE THROTTLE POSITION SENSOR GROUND WIRE FOR OPEN CIRCUIT
1. Disconnect the ECM electrical connector PI I and the throttle position sensor electrical connector PI 26.
2. Measure the resistance between PI 26 pin 1 (BG) and PI 1 pin 19 (BG).

- Is the resistance less than 5 ohms?

-> Yes
Goto [G240070t13]

-> No
REPAIR the throttle position sensor ground circuit from the ECM to the throttle position sensor. CLEAR the DTC. TEST the system for normal operation.

G240070t13 : CHECK THE THROTTLE POSITION SENSOR
1. Measure the resistance between PI 26 pin 2 and PI 26 pin 4.
2. Measure the resistance between PI 26 pin 3 and PI 26 pin 4.

- Are the resistor values the same?

-> Yes
Goto [G240070t14]

-> No
INSTALL a new throttle body.

G240070t14 : CHECK CONTINUITY OF THE THROTTLE POSITION SENSOR OUTPUT CIRCUIT
1. Measure the resistance between PI 1 pin 75 (R) and PI 26 pin 3 (R).
2. Measure the resistance between PI 1 pin 76 (Y) and PI 26 pin 2 (Y).

- Is the resistance less than 5 ohms?

-> Yes
Goto [G240070t15]

-> No
REPAIR the circuit from the ECM to the throttle position sensor. CLEAR the DTC. TEST the system for normal operation.

G240070t15 : CHECK THE THROTTLE POSITION SENSOR OUTPUT CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance between PI 26 pin 3 (R) and ground.
2. Measure the resistance between PI 26 pin 2 (Y) and ground.

- Is the resistance greater than 10,000 ohms?

-> Yes
DIAGNOSE the electronic engine control system

-> No
REPAIR the circuit from the ECM to the throttle position sensor. CLEAR the DTC. TEST the system for normal operation.