PINPOINT TEST G258127p22

Pinpoint Tests

PINPOINT TEST G258127p22 : DTC P1122, P1123*; ACCELERATOR PEDAL POSITION (APP) SENSOR SENSING CIRCUIT 1 HIGH/LOW VOLTAGE

G258127t83 : CHECK THE APP SENSOR SENSING CIRCUIT 1 FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the ECM electrical connector, PI01.
3. Disconnect the APP sensor electrical connector, CR14.
4. Measure the resistance between CR14, pin 01 (Y) and PI01, pin 103 (Y).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t84.

G258127t84 : CHECK THE APP SENSOR SENSING CIRCUIT FOR SHORT TO HIGH VOLTAGE
1. Reconnect the battery negative terminal.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between CR14, pin 01 (Y) and GROUND.

- Is the voltage greater than 3 volts?

->YES
REPAIR the short circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t85.

G258127t85 : CHECK THE APP SENSOR SENSING CIRCUIT FOR SHORT TO GROUND
1. Turn the ignition switch to the OFF position.
2. Measure the resistance between CR14, pin 01 (Y) and GROUND.

- Is the resistance less than 10,000 Ohms?

->YES
REPAIR the short circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
GO to Pinpoint Test G258127t86.

G258127t86 : CHECK THE APP SENSOR SUPPLY VOLTAGE AT THE SENSOR
1. Reconnect the ECM electrical connector, PI01.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between CR14, pin 02 (OY) and GROUND.

- Is the voltage less than 4 volts?

->YES
GO to Pinpoint Test G258127t87.

->NO
INSTALL a new APP sensor. CLEAR the DTC. TEST the system for normal operation.

G258127t87 : CHECK THE APP SENSOR SUPPLY VOLTAGE CIRCUIT FOR HIGH RESISTANCE
1. Turn the ignition switch to the OFF position.
2. Disconnect the ECM electrical connector, PI01.
3. Measure the resistance between PI01, pin 12 (OY) and CR14, pin 02 (OY).

- Is the resistance greater than 5 Ohms?

->YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

->NO
Check the ECM power supplies (recheck DTCs. P1104 may be flagged).