3T7S87802-0 Tohatsu DECAL SET

The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.
Test Step 1. Inspect the Electrical Connectors and the Wiring
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Schematic
Turn the keyswitch to the OFF position.
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Left side view (1) Engine coolant temperature sensor (2) Intake manifold air temperature sensor (3) Engine oil temperature sensor (4) ECM (5) J2/P2 ECM connector
Thoroughly inspect connector (5). Inspect the connectors for sensors (1), (2), and (3). Refer to Troubleshooting, "Electrical Connectors - Inspect".
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P2 terminations for the engine temperature sensors (P2-18) Sensor return (P2-32) Engine coolant temperature (P2-34) Engine oil temperature (P2-35) Intake manifold air temperature
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Harness connector for the temperature sensors (1) Signal (2) Return
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the temperature sensors.
Check the allen head screw on the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque.
Check the harness and wiring for abrasions and for pinch points from each sensor to the ECM.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The connectors and wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors and/or wiring.Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled. Verify that the repair eliminates the problem.STOPTest Step 2. Check for Active Diagnostic Codes
Connect the Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the keyswitch to the ON position.
Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes.Note: Wait at least 15 seconds in order for the diagnostic codes to become active.
Look for an active -03 diagnostic code or an active -04 diagnostic code.Expected Result:No -03 or -04 diagnostic codes are active.Results:
OK - No -03 or -04 codes are active.Repair: The problem may have been related to a faulty connection in the harness. Carefully reinspect the connectors and wiring. Refer to Troubleshooting, "Electrical Connectors - Inspect" for additional information.STOP
Not OK - An -04 diagnostic code is active at this time. Proceed to Test Step 3.
Not OK - An -03 diagnostic code is active at this time. Proceed to Test Step 4.Test Step 3. Disconnect the Suspect Sensor in Order to Create an Open Circuit
Turn the keyswitch to the OFF position.
Disconnect the suspect sensor from the engine harness.
Turn the keyswitch to the ON position. Wait at least 15 seconds for activation of the diagnostic codes.
Access the "Active Diagnostic Codes" screen on Cat ET and check for an active -03 diagnostic code for the suspect sensor.
Turn the keyswitch to the OFF position.Expected Result:An -03 diagnostic code is now active for the suspect sensor.Results:
OK - An 04 diagnostic code was active before disconnecting the sensor. An 03 diagnostic code became active after the sensor was disconnected.Repair: Temporarily connect a new sensor to the harness, but do not install the new sensor in the engine. Verify that there are no active diagnostic codes for the sensor. If there are no active diagnostic codes for the sensor, permanently install the new sensor. Clear any logged diagnostic codes. Verify that the repair eliminates the problem.STOP
Not OK - The 04 diagnostic code is still present. Leave the sensor disconnected. Proceed to Test Step 7.Test Step 4. Check the Pull-up Voltage at the Sensor Connector
Disconnect the suspect sensor at the sensor connector.
Turn the keyswitch to the ON position.
Measure the voltage between terminal 1 (signal) and terminal 2 (return) at the harness connector.
Turn the keyswitch to the OFF position.Expected Result:The voltage is 5.5 0.5 VDC.Results:
OK - The voltage is 5.5 0.5 VDC. The correct pull-up voltage is present at the harness connector for the suspect sensor.Repair: The open circuit is in the sensor or the wire between the sensor and the sensor connector. Replace the sensor. Do not install the sensor in the engine. Verify that no diagnostic codes are active for the suspect sensor before permanently installing the sensor.STOP
Not OK - The voltage is not 5.5 0.5 VDC. There is a short circuit to another wire in the wiring harness. Proceed to Test Step 5.Test Step 5. Check the Signal Wire for a Short Circuit
Turn the keyswitch to the OFF position.