PINPOINT TEST G258127P3

Pinpoint Tests

PINPOINT TEST G258127p3 : DTC P0116*, P0117, P0118, P0125; ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT RANGE/PERFORMANCE, HIGH/LOW VOLTAGE

G258127t8 : CHECK THE ECT SENSOR SENSING CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the ECM electrical connector, PI01.
3. Disconnect the ECT sensor electrical connector, PI25.
4. Measure the resistance between PI01, pin 70 (UY) and PI25, pin 02 (UY).

- 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 G258127t9.

G258127t9 : CHECK THE ECT 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 PI25, pin 02 (UY) 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 G258127t10.

G258127t10 : CHECK THE ECT SENSOR SENSING CIRCUIT FOR SHORT TO GROUND
1. Turn the ignition switch to the OFF position.
2. Measure the resistance between PI25, pin 02 (UY) 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 ECT sensor. CLEAR the DTC. TEST the system for normal operation.