PCC1302 Command Code 145 Engine Coolant Temperature OOR High Solution

This illustration show you guide on how to solve Pcc1302 Command controller fault code 145 engine coolant temperature OOR high warning problem.

Preparations:

2023 InPower V14.5 Pro V12 Diagnostic Software Free Download

PowerCommand Diagnostic 9 Pin Adapter Cable for InPower

 

Procedures:
Engine coolant temperature signal voltage is out of range – shorted high.

Possible Cause:
1 Fault simulation feature is enabled
2 Faulty coolant temperature sensor connections
3 Faulty coolant temperature sensor
4 Faulty engine harness
5 Faulty extension harness
6 Verify controller calibrations

Diagnosis and Repair:
1 Fault simulation feature is enabled
a Connect InPower.

B Verify that the fault simulation is not enabled for the intake manifold temperature sensor by connecting to the PCC via InPower. If the fault simulation is disabled, there is no problem.

2 Faulty coolant temperature sensor connections
a Inspect the coolant temperature sensor and the harness connector pins.
a Disconnect the engine harness connector from the coolant temperature sensor.
b Inspect for corroded pins, bent or broken pins, pushed back or expanded pins.
c Inspect for evidence of moisture in or on the connector.
d Inspect for missing or damaged connector seals.
e Inspect for dirt or debris in or on the connector pins.

3 Faulty coolant temperature sensor
a Check the resistance of the sensor.
a Disconnect the engine harness connector from the coolant temperature sensor.
b Measure the resistance between the coolant temperature signal pin and the coolant temperature return pin.
c Refer to the troubleshooting and repair manual for the specific engine platform for coolant temperature ranges.

4 Faulty engine harness
a Inspect the engine harness and the connector pins.
a Disconnect the engine harness connector from the extension harness.
b Inspect for corroded pins, bent or broken pins, pushed back or expanded pins.
c Inspect for evidence of moisture in or on the connector.
d Inspect for missing or damaged connector seals.
e Inspect for dirt or debris in or on the connector pin.

b Check for a short circuit from pin to pin.
a Disconnect the engine harness connector from the extension harness.
b Disconnect the engine harness from the coolant temperature sensor.
c Disconnect the engine harness from all sensors that have a shared return with the coolant temperature sensor.
d Measure the resistance from the coolant temperature return pin on the engine harness inline connector to all other pins in the engine harness inline connector.
e Measure the resistance from the coolant temperature signal pin on the engine harness inline connector to all other pins in the engine harness inline connector.
f If all measurements are greater than 100k Ohms, then the resistance is correct.

c Check for a short circuit to engine block ground.
a Disconnect the extension harness from the engine harness.
b Measure the resistance from the coolant temperature signal pin on the extension harness connector to the engine block ground.

c If the measurement is more than 100k ohms, then the resistance is correct.

d Check for an open circuit.
a Disconnect the engine harness connector from the extension harness.
b Disconnect the engine harness from the coolant temperature sensor.
c Measure the resistance from the coolant temperature return pin on the engine harness inline connector to the coolant temperature return pin at the engine harness sensor connector.
d Measure the resistance from the coolant temperature signal pin on the engine harness inline connector to the coolant temperature signal pin at then engine harness sensor connector.
e If the measurement is less than 10 ohms, then the resistance is correct.

5 Faulty extension harness
a Inspect the extension harness connector pins.
a Inspect for corroded pins, bent or broken pins, pushed back or expanded pins.
b Inspect for evidence of moisture in or on the connector.
c Inspect for missing or damaged connector seals.
d Inspect for dirt or debris in or on the connector pins.

b Check for an open circuit.
a Disconnect the extension harness from the engine harness.
b Measure the resistance from the coolant temperature return pin on the extension harness connector to the coolant temperature return pin at the extension harness inline connector.
c Measure the resistance from the coolant temperature signal pin on the extension harness to the coolant temperature signal pin at the extension harness inline connector.
d If all measurements are greater than 10 Ohms, then the resistance is correct.

c Check for a short circuit from pin to pin.
a Disconnect the extension harness from the engine harness.
b Measure the resistance from the coolant temperature return pin on the extension harness connector to all other pins in the extension harness connector.
c Measure the resistance from the coolant temperature signal pin on the extension harness connector to all other pins in the extension harness connector.
d If all measurements are greater than 100k ohms, then the resistance is correct.

6 Verify controller calibrations
a Using the display or the InPower Service tool, verify the calibration in the PCC.
a If the calibration in the PCC matches the latest calibration on the InCal website, then the calibration is correct. If it does not, update the calibration to the latest.

b Using the InSite Service tool, verify the calibration in the ECM.
a If the calibration in the ECM matches the latest calibration on QSOL, then the calibration is correct. If it does not, update the ECM to the latest calibration.