P0516

P0516-BATTERY TEMPERATURE SENSOR CIRCUIT LOW





For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

With the ignition on and battery voltage greater than 10.4 volts.

- Set Condition:

The circuit voltage to the ECM falls below a calibrated threshold for a certain period of time.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


1. BATTERY TEMP SENSOR

Turn the ignition off.

Disconnect the Battery temp sensor harness connector.

Check connectors - Clean/repair as necessary.

Measure the resistance of the Battery temp sensor.

Is the resistance between 300 and 90k ohms?

Yes

- Go To 2

No

- Replace the battery temp sensor.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

2. (K25) SIGNAL CIRCUIT SHORTED TO GROUND

Disconnect the ECM harness connectors.

Check connectors - Clean/repair as necessary.

Measure the resistance between the engine ground and the temperature sensor (K25) signal circuit at the sensor connector.

Is the resistance more than 100 k ohms?

Yes

- Go To 3

No

- Repair the Battery temp sensor (K25) signal circuit shorted to ground.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

3. (K25) SIGNAL CIRCUIT SHORTED

Measure the resistance between the Battery temp sensor (K25) signal circuit and all other circuits in the ECM harness connector of the engine harness.

Is the resistance more than 100k ohms?

Yes

- Go To 4

No

- Repair the (K25) signal circuit shorted to another circuit.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

4. INTERMITTENT CONDITION

Reconnect the disconnected Battery temp sensor harness connector.

While monitoring with scan tool, disconnect the temperature sensor harness connector.

Did P0517 set?

Yes

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition

No

- Replace the ECM.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test