853221 Mercruiser PULLEY, Water Pump

Illustration 1 g00786393
Typical schematic rear engine ECM
Illustration 2 g00786434
Typical schematic front engine ECM
Illustration 3 g00947988
Typical schematic master ECM
Test Step 1. Check for Connector Damage.
Turn the keyswitch to the OFF position.
Turn the battery disconnect switch to the OFF position.
Thoroughly inspect the ECM connectors J1/P1 and J2/P2. Inspect all of the other connectors. Refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 lb in).
Check the customer connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 lb in).
Check the harness and the wiring for abrasion and for pinch points. Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring should not have corrosion, abrasion or pinch points.Results:
OK - The connectors and wiring are okay. Proceed to Test Step 2.
Not OK - The connectors and/or wiring are not okay.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOPTest Step 2. Check for "ACTIVE" Diagnostic Codes.
Turn the battery disconnect switch to the ON position.
Connect the Caterpillar Electronic Technician (ET) to the cab service tool connector J42. The cab service tool connector J42 is located in the rear compartment of the cab. Start the Cat ET.
Turn the keyswitch to the ON position. The engine should be off.
Wait for 15 seconds for the CID-FMI. Expected Result:Determine the failure mode identifier (FMI). Determine if the diagnostic codes 262-03 5 Volt Sensor Supply short to +batt or 262-04 5 Volt Sensor Supply short to ground are present. Determine if the diagnostic codes 263-03 Digital Sensor Supply short to +batt or 263-04 Digital Sensor Supply short to ground are present.Results:
FMI 03 - A diagnostic code with a FMI of 03 is present. Proceed to Test Step 3.
FMI 04 - A diagnostic code with a FMI of 04 is present. Proceed to Test Step 4.
FMI 08 - A diagnostic code with a FMI of 08 is present. Proceed to Test Step 11.
262-03 or 262-04 Active Code - A diagnostic code of 262-03 or 262-04 is present.Repair: Perform the diagnostic functional test Troubleshooting, "Analog Sensor Supply".STOP
263-03 or 263-04 Active Code - A diagnostic code of 263-03 or 263-04 is present.Repair: Perform the diagnostic functional test Troubleshooting, "Digital Sensor Supply".STOPTest Step 3. Check the Sensor Supply Voltage at the Sensor Connector if the Diagnostic Code FMI-03 is Present.
Turn the keyswitch to the OFF position.
Disconnect the suspect sensor. Note: Disconnecting the sensor will generate an open circuit diagnostic code for any sensor that is disconnected. Troubleshoot the original diagnostic code. Reset the system. Delete the logged diagnostic codes when you are finished.
Turn the keyswitch to the ON position. The engine should be off.
Measure the voltage on the ECM side of the sensor connector between pin A and pin B for the suspect sensor. Expected Result:The supply voltage should be 5.0 0.2 VDC for all analog sensors and 8.0 0.4 VDC for all digital sensors.Results:
OK - The voltage is 5.0 0.2 VDC for all analog sensors and 8.0 0.4 VDC for all digital sensors. Proceed to Test Step 5.
Not OK - The voltage is not 5.0 0.2 VDC for all analog sensors and 8.0 0.4 VDC for all digital sensors. Proceed to Test Step 7.Test Step 4. Check the Sensor Supply Voltage at the Sensor Connector if the Diagnostic Code FMI-04 is Present.
Turn the keyswitch to the OFF position.
Disconnect the suspect sensor. Note: Disconnecting the sensor will generate an open circuit diagnostic code for any sensor that is disconnected. Troubleshoot the original diagnostic code. Reset the system. Delete the logged diagnostic codes when you are finished.
Turn the keyswitch to the ON position. The engine should be off.
Measure the voltage on the ECM side of the sensor connector between pin A and pin B for the suspect sensor. Expected Result:The supply voltage should be 5.0 0.2 VDC for all analog sensors and 8.0 0.4 for all digital sensors.Results:
OK - The voltage is 5.0 0.2 VDC for all analog sensors and 8.0 0.4 VDC for all digital sensors. Proceed to Test Step 8.
Not OK - The voltage is not 5.0 0.2 VDC for all analog sensors and 8.0 0.4 VDC for all digital sensors. Proceed to Test Step 7.Test Step 5. Check for a Short to the + Battery.
Turn the keyswitch to the OFF position.
Disconnect the suspect sensor. Note: Disconnecting the sensor will generate an open circuit diagnostic code for any sensor that is disconnected. Troubleshoot the original diagnostic code. Reset the system. Delete the logged diagnostic codes when you are finished.
Turn the keyswitch to the ON position. The engine should be off.
Measure the voltage on the ECM side of the sensor connector between pin B and the engine ground.
Measure the voltage on the ECM side of the sensor connector between pin C and the engine ground.
Turn the keyswitch to the OFF position. Expected Result:The voltage will measure 24 3 VDC when a short to the + Battery is present.Results:
OK - The voltage measures 24 3 VDC. A short to the + Battery is present.Repair: Repair the connectors or wiring and/or replace the connectors or wiring.STOP
Not OK - The voltage on pin B should measure 0 VDC. The voltage on pin C may measure approximately 6.5 VDC. The voltage on pin C is a pull up voltage. The ECM provides the pull up voltage to the signal input when the ECM senses an open circuit in the incoming input signal. Frequency sensors do not receive a pull up voltage. The sensor common and signal wire are not shorted to the + Battery. Proceed to Test Step 6.Test Step 6. Create a Short at the Sensor Connector.Note: The sensor should be disconnected. The CID-FMI was originally 03 which indicates an open. If a short is installed