182 RENR5042-02 Troubleshooting Section Repair: Troubleshoot and repair any active diagnostic codes before you continue with this procedure. If you choose to permanently install the harness, fasten the harness to the existing engine wiring harness with cable ties. Also, install a 3E-3364 Receptacle and two 8T-8737 Seal Plugs on the P400 timing calibration probe connector in order to prevent moisture and debris from entering the connector. STOP. Test Step 5. Calibrate the Engine Speed/Timing Sensor 8. Return the engine to service. A. Set the engine speed to 1100 ± 50 rpm. The engine speed must be steady within this rpm range in order for the calibration to be successful. STOP. B.
After the engine has warmed up, access the “Timing Calibration” screen on the Cat ET. Access the following display screens in order: Not OK – The timing calibration was unsuccessful. Repair: The following conditions can cause the timing calibration to fail: Service If the crankshaft and camshaft gears have been reassembled incorrectly, the timing will not calibrate. Calibrations Timing Calibration Verify that the timing calibration probe is installed correctly. C. To calibrate the timing, select “Continue” on Cat ET. Wait until Cat ET indicates that the timing is calibrated. Verify that the engine speed is correct and that the engine speed is stable.
If the engine speed is unstable, refer to Troubleshooting, “Engine Misfires, Runs Rough or Is Unstable”. Expected Result: Cat ET indicates that the timing is calibrated. There may be a problem with the transducer or with the cables. Obtain a new transducer and/or a new cable and repeat the timing calibration. Results: OK – Cat ET indicates that the timing is calibrated. STOP. Repair: Perform the following procedure: 1. Set the engine speed to low idle. i02225548 Throttle Position Sensor - Calibrate Note: Disconnect the 7X-1695 Cable As before you exit the “Timing Calibration” screen. Otherwise, diagnostic codes may be activated. SMCS Code: 1913-524 2. Disconnect the 7X-1695 Cable As.
System Operation Description: 3. Exit the “Timing Calibration” screen on Cat ET. There are two options for calibrating the throttle position sensor: 4. Turn the keyswitch to the OFF position. Mechanical Calibration During a manual calibration, two set screws on the throttle position sensor are adjusted. The set screws are for low idle stop and high idle stop. 5. Remove the transducer and remove the adapter. 6. Install the plug into the timing calibration port. Electronic Calibration During an electronic calibration, the Caterpillar Electronic Technician (ET) is used to set the PWM that is equal to low idle and the PWM that is equal to high idle. 7.
If you installed a 170-3519 Harness, you may remove the harness or you may permanently install the harness for future use. If you remove the harness, install the sealing plugs into the unused cavities of the P2 connector. Otherwise, moisture and debris will enter the connector.