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Home >> Honda >> 2003 >> Civic L4-1668cc 1.7L SOHC MFI >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P0715

P0715

DTC P0715: Problem in Mainshaft Speed Sensor Circuit

NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot.

Code P0715 (15) on the PCM doesn't always mean there's an electrical problem in the mainshaft or countershaft speed sensor circuit; code P0715 (15) may also indicate a mechanical problem in the transmission. Any problem causing irregular countershaft to mainshaft speed difference can cause this code.
1. Check the mainshaft and countershaft speed sensor installation.
Are the mainshaft and countershaft speed sensor installed properly?
YES-Go to step 2.
NO-Reinstall and recheck.
2. Disconnect mainshaft speed sensor connector (2P).





3. Measure mainshaft speed sensor resistance at the sensor connector.
Is there 400 - 600 Ohms ?
YES-Go to step 4.
NO-Replace the mainshaft speed sensor.
4. Disconnect PCM connector C (22P).





5. Check for continuity between PCM connector terminal C7 and body ground, and between terminal C21 and body ground.
Is there continuity?
YES-Repair short to ground in the wires between PCM connector terminals C7 and C21, and the mainshaft speed sensor.
NO-Go to step 6.
6. Connect mainshaft speed sensor connector.





7. Measure the resistance between PCM connector terminals C7 and C21.
Is there 400 - 600 Ohms ?
YES-Run the Electrical Troubleshooting Flowchart for code P0720 (code 9). Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.
NO-Go to step 8.
8. Disconnect mainshaft speed sensor connector (2P).





9. Check for continuity between PCM connector terminal C7 and the No. 2 terminal of the mainshaft speed sensor connector.
Is there continuity ?
YES-Go to step 10.
NO-Repair open in the wire between PCM connector terminal C7 and the mainshaft speed sensor.





10. Check for continuity between PCM connector terminal C21 and the No. 1 terminal of the mainshaft speed sensor connector.
Is there continuity?
YES-Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.
NO-Repair open in the wire between PCM connector terminal C21 and the mainshaft speed sensor.

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