P0198-ENGINE OIL TEMPERATURE SENSOR CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
Set Condition:
The PCM detects that the Engine Oil Temperature Sensor input voltage is above the maximum acceptable value.

Possible Causes

INTERMITTENT DTC

(G24) EOT SIGNAL CIRCUIT SHORTED TO VOLTAGE

(G24) EOT SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

(K915) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

ENGINE OIL TEMPERATURE SENSOR

POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Diagnostic Test

1.DTC IS ACTIVE

NOTE: Diagnose and repair any system voltage or sensor reference voltage DTCs before continuing with this test.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

Is the status Active for this DTC?

Yes

Go To 2

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.(G24) EOT SIGNAL CIRCUIT SHORTED TO VOLTAGE

Is there any voltage present?

Yes

Repair the (G24) EOT Signal circuit for a short to voltage.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 3

3.(G24) ENGINE OIL TEMP SIGNAL OPEN OR HIGH RESISTANCE

Is the resistance below 5.0 ohms?

Yes

Go to 4

Repair the (G24) EOT Signal circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

4.(K915) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 5.0 ohms?

Yes

Go to 5

Repair the (K915) Sensor Ground 3 circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

5.ENGINE OIL TEMPERATURE SENSOR

Is the voltage below 1.0 volt with the jumper wire in place?

Yes

Replace the Engine Oil Temperature Sensor in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 6

6.POWERTRAIN CONTROL MODULE (PCM)

Were any problems found?

Yes

Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).