PINPOINT TEST G258127P2

Pinpoint Tests

PINPOINT TEST G258127p2 : DTC P0111, P0112, P0113; INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT RANGE/PERFORMANCE, HIGH/LOW VOLTAGE

G258127t5 : CHECK THE IAT SENSOR SENSING CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the ECM electrical connector, PI01.
3. Disconnect the MAF sensor electrical connector, PI14.
4. Measure the resistance between PI01, pin 71 (U) and PI14, pin 04 (U).

- 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 G258127t6.

G258127t6 : CHECK THE IAT 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 PI14, pin 04 (U) and GROUND.

- Is the voltage greater than 3 volts?

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

->NO
GO to Pinpoint Test G258127t7.

G258127t7 : CHECK THE IAT SENSOR SENSING CIRCUIT FOR SHORT TO GROUND
1. Turn the ignition switch to the OFF position.
2. Measure the resistance between PI14, pin 04 (U) and GROUND.

- Is the resistance less than 10,000 Ohms?

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

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