P0197

: DTC P0197; ENGINE OIL TEMPERATURE (EOT) SENSOR RANGE/PERFORMANCE, HIGH/LOW VOLTAGE

G258127t45 : CHECK THE EOT SENSOR SENSING CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the EOT sensor electrical connector, PI24.
3. Disconnect the ECM electrical connector, PI01.
4. Measure the resistance between PI24, pin 01 (Y) and PI01, pin 78 (Y).

- Is the resistance greater than 5 ohms?

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

-> No

G258127t46 : CHECK THE EOT 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 PI24, pin 01 (Y) 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

G258127t47 : CHECK THE EOT SENSOR SENSING CIRCUIT FOR SHORT TO GROUND
1. Turn the ignition switch to the OFF position.
2. Measure the resistance between PI24, pin 01 (Y) 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

G258127t48 : CHECK THE EOT SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between PI24, pin 02 (BG) and PI01, pin 19 (BG).

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. This circuit includes harness splices, PIS1 and EMS2. CLEAR the DTC. TEST the system for normal operation.

-> No
INSTALL a new EOT sensor. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, contact dealer technical support for advice on possible ECM failure.