User Manual Q&AAnswer
Feb 21, 2025 - 07:53 AM
Based on the information provided in the ProTech EPA07 Engine Exhaust Instruction Manual, here is a step-by-step guide to troubleshoot and fix the SPN 2623/FMI 8 error code:
1. Start by disconnecting the Accelerator Pedal (AP) and inspecting both the AP and harness side connectors for any signs of damage, such as bent, spread, corroded, or unseated pins. Also, check for signs of moisture in the connector or wire damage near the connector. If any damage is found, repair it accordingly and verify the repair.
2. With the ignition ON (key ON, engine OFF), measure the voltage between pin B of the AP harness connector and ground. If voltage is present, there may be a short to power between pin B of the AP harness connector and pin 4 of the CPC connector #1. Repair this short to power and verify the repair.
3. Determine if your vehicle is equipped with a Williams Dual-Channel Analog Pedal. If it is, proceed to step 6. If not, skip to step 15.
4. Disconnect the CPC connector #3 and measure the resistance between pin D of the AP harness connector and pin 3 of the CPC connector #3. If the resistance is less than five ohms, reconnect the CPC connector #3 and proceed to step 8. If the resistance is higher, repair the open circuit between pin D of the AP harness connector and pin 3 of the CPC connector #3. Verify the repair.
5. Measure the voltage between pin D of the AP harness connector and ground. If the voltage is between 4.5 and 5.5 volts, repair the open circuit between pin E of the AP harness connector and pin 2 of the CPC connector #3. Verify the repair. If the voltage is higher than 5.5 volts, repair the short to battery power between pin D of the AP harness connector and pin 3 of the CPC connector #3. Verify the repair.
6. Measure the voltage between pin E of the AP harness connector and ground. If voltage is present, repair the short to power between pin E of the AP harness connector and pin 2 of the CPC connector #3. Verify the repair. If voltage is not present, proceed to step 11.
7. Disconnect the CPC connector #4 and measure the resistance between pin F of the AP harness connector and pin 14 of the CPC connector #4. If the resistance is less than five ohms, reconnect the CPC connector #4 and proceed to step 13. If the resistance is higher, repair the open circuit between pin F of the AP harness connector and pin 14 of the CPC connector #4. Verify the repair.
8. Measure the resistance between pin F of the AP harness connector and ground. If the resistance is greater than 10K ohms, proceed to step 14. If the resistance is lower, repair the short to ground circuit between pin F of the AP harness connector and pin 14 of the CPC connector #4. Verify the repair.
9. Measure the voltage between pin F of the AP harness connector and ground. If voltage is present, repair the short to power between pin F of the AP harness connector and pin 14 of the CPC connector #4. Verify the repair. If voltage is not present, it is recommended to replace the AP. Refer to the Original Equipment Manufacturer (OEM) literature for further instructions.
10. Disconnect the CPC connector #2 and measure the resistance between pin F of the AP harness connector and pin 2 of the CPC connector #2. If the resistance is less than five ohms, reconnect the CPC connector #2 and proceed to step 17. If the resistance is higher, repair the open circuit between pin F and pin 2 of the CPC #2 connector. Verify the repair.
11. Measure the voltage between pin F of the AP harness connector and ground. If voltage is present, repair the short to power between pin F of the AP harness connector and pin 2 of the CPC connector #2. Verify the repair. If voltage is not present, it is recommended to replace the AP. Refer to the OEM literature for further instructions.
By following these troubleshooting steps, you should be able to identify and resolve the issue with the Channel 2 Sensor Signal in your ProTech EPA07 Engine Exhaust system.
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