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FAULT CODE 245

Engine Fan Clutch Supply Circuit

Printable Version  Printable Version

Overview

CODE REASON EFFECT
Fault Code: 245
PID: S033
SPN: 647
FMI: 4
LAMP: Yellow
SRT: 00-099		 Less than 6 VDC detected at fan clutch supply pin 7 of the actuator harness connector. This indicates a current draw from the electronic control module (ECM) greater than 2 amps or a faulty ECM power supply. The fan will probably not engage. Possible engine overheat if an ECM-controlled fan is in use.

Engine Fan Clutch Supply Circuit

Circuit Description

The fan clutch solenoid is a device used by the ECM to control the engine fan by sending a signal to open or close the fan clutch solenoid.

Component Location

Refer to an OEM diagram for the location of the fan clutch solenoid.

Shop Talk

The ECM supplies no voltage to the fan clutch to turn the fan on and battery voltage, 12 VDC in North America (24 VDC in industrial, U.K., and Europe), to turn the fan off.

Cautions and Warnings

 CAUTION 

 

To reduce the possibility of pin and harness damage, use this test lead when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead.
 CAUTION 

 

To reduce the possibility of damaging a new ECM, all other active fault codes must be investigated prior to replacing the ECM.
 CAUTION 

 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead.

Troubleshooting Steps

STEPS SPECIFICATIONS
STEP 1. Check the fan clutch solenoid.
STEP 1A. Check for extra wires on the fan clutch solenoid post. No extra wires
STEP 1B. Check for shorted fan clutch circuit on OEM side. Fault Code 245 active
STEP 2. Check the OEM harness.
STEP 2A. Inspect the 9-pin Deutsch connector for damaged pins. No damaged pins
STEP 2B. Check for a short circuit in the OEM harness. More than 100k ohms
STEP 2C. Check for a short circuit to ground. More than 100k ohms
STEP 3. Check the actuator harness.
STEP 3A. Inspect the harness and the ECM connector pins. No damaged pins
STEP 3B. Check for a short circuit between pins. More than 100k ohms
STEP 3C. Check for a short circuit to ground. More than 100k ohms
STEP 4. Check the ECM fan clutch supply voltage.
STEP 4A. Check the supply voltage at the ECM. At least 6 VDC
STEP 5. Clear the fault codes.
STEP 5A. Disable the fault code. Fault Code 245 inactive
STEP 5B. Clear the inactive fault codes. All fault codes cleared

Guided Step 1 – Check the fan clutch solenoid.

Guided Step 1A – Check for extra wires on the fan clutch solenoid post.

Conditions

  • Turn keyswitch OFF.

Action

  • Inspect the fan clutch solenoid post or the fan clutch relay coil.
OK NOT OK
No extra wires Remove extra wires. Note: A single wire must exist from relay/solenoid back to pin 7 in the actuator connector at the ECM.

Guided Step 1B – Check for shorted fan clutch circuit on OEM side.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the 9-pin OEM connector.
  • Jump the keyswitch across the 9-pin OEM connector from pin A to pin A.

Action

  • Start the engine.
OK NOT OK
Fault Code 245 active Fault Code 245 inactive

  • Repair or replace defective OEM component causing the short.

Guided Step 2 – Check the OEM harness.

Guided Step 2A – Inspect the 9-pin Deutsch connector for damaged pins.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the 9-pin Deutsch connector.
  • Disconnect the actuator harness from the 9-pin Deutsch connector.
  • Flush and clean the connector pins using electronic contact cleaner, Part Number 3824510.

Action

  • Bent or broken pins
  • Pushed back or expanded pins
  • Corroded pins
  • Moisture in or on the connector
  • Missing or damaged seals
  • Dirt or debris in or on the connector pins.
OK NOT OK
No damaged pins Repair the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Repair the OEM harness. Refer to Procedure 019-207.
  • Replace the OEM harness. Refer to the OEM troubleshooting and repair manual.
  • Repair the actuator harness. Refer to Procedure 019-207.
  • Replace the actuator harness. Refer to Procedure 019-043.
  • Replace the 9-pin connector. Refer to Procedure 019-207.

 CAUTION 

 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead.
Guided Step 2B – Check for a short circuit in the OEM harness.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the OEM harness from the fan clutch solenoid.
  • Disconnect the actuator harness from the 9-pin connector.

Action

  • Measure the resistance from pin E of the 9-pin connector to all other pins in the connector.
OK NOT OK
More than 100k ohms Replace the OEM harness. Refer to the OEM troubleshooting and repair manual.

 CAUTION 

 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead.
Guided Step 2C – Check for a short circuit to ground.

Conditions

  • Disconnect the OEM harness from the fan clutch solenoid.
  • Disconnect the actuator harness from the 9-pin connector.

Action

  • Measure the resistance from pin E in the OEM harness to engine block ground.
OK NOT OK
More than 100k ohms Replace the OEM harness. Refer to the OEM troubleshooting and repair manual.

Guided Step 3 – Check the actuator harness.

 CAUTION 

 

To reduce the possibility of damaging a new ECM, all other active fault codes must be investigated prior to replacing the ECM.
Guided Step 3A – Inspect the harness and the ECM connector pins.

Conditions

  • Turn keyswitch OFF.
  • Disconnect the actuator harness connector from the ECM.
  • Flush and clean the connector pins using electronic contact cleaner, Part Number 3824510.

Action

  • Bent or broken pins
  • Pushed back or expanded pins
  • Corroded pins
  • Moisture in or on the connector
  • Missing or damaged seals
  • Dirt or debris in or on the connector pins.
OK NOT OK
No damaged pins Repair the damaged pins.

  • Flush the dirt, debris, or moisture from the connector pins using electronic contact cleaner, Part Number 3824510.
  • Repair the actuator harness. Refer to Procedure 019-203.
  • Replace the actuator harness. Refer to Procedure 019-043.
  • Replace the ECM. Refer to Procedure 019-031.
  • Replace the o-ring on the 28-pin connector if it is damaged or missing. Refer to Procedure 019-203.

 CAUTION 

 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead.
Guided Step 3B – Check for a short circuit between pins.

Conditions

  • Disconnect the OEM harness from the fan clutch solenoid.
  • Disconnect the actuator harness connector from the ECM.
  • Disconnect the sensor harness connector from the ECM.

Action

  • Measure the resistance from pin 7 to all other pins in the actuator harness connector.
OK NOT OK
More than 100k ohms Replace the actuator harness. Refer to Procedure 019-043.

 CAUTION 

 

To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement:
Part Number 3822758 – male Deutsch/AMP/Metri-Pack test lead.
Guided Step 3C – Check for a short circuit to ground.

Conditions

  • Disconnect the OEM harness from the fan clutch solenoid.
  • Disconnect the actuator harness connector from the ECM.

Action

  • Measure the resistance from pin 7 in the actuator harness connector to engine block ground.
OK NOT OK
More than 100k ohms Repair or replace the actuator harness.

  • Repair the actuator harness. Refer to Procedure 019-203.
  • Replace the actuator harness. Refer to Procedure 019-043.

Guided Step 4 – Check the ECM fan clutch supply voltage.

 CAUTION 

 

To reduce the possibility of damaging a new ECM, all other active fault codes must be investigated prior to replacing the ECM.
Guided Step 4A – Check the supply voltage at the ECM.

Conditions

  • Disconnect the actuator harness connector from the ECM.
  • Be sure the fan is OFF.
  • Insert jumper wire from pin 23 of actuator harness connector to pin 23 of ECM actuator port.
  • Insert jumper wire from pin 27 of actuator harness connector to pin 27 of ECM actuator port.
  • Turn keyswitch ON.

Action

  • Measure the voltage from pin 7 at the ECM actuator port to ground.
OK NOT OK
At least 6 VDC Replace the ECM. Refer to Procedure 019-031.

Guided Step 5 – Clear the fault codes.

Guided Step 5A – Disable the fault code.

Conditions

  • Connect all the components.

Action

  • Start the engine and let it idle for 1 minute.
  • Verify Fault Code 245 is inactive.
OK NOT OK
Fault Code 245 inactive Return to the troubleshooting steps or contact your nearest Cummins Authorized Repair Location if all the steps have been completed and checked again.

Guided Step 5B – Clear the inactive fault codes.

Conditions

  • Connect all the components.

Action

  • Erase the inactive fault codes using INSITE™.
OK NOT OK
All fault codes cleared Troubleshoot any remaining active fault codes.
Repair complete
Appropriate troubleshooting chart
Last Modified:  29-Oct-2003
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