Variable Valve Timing Electronic Control System (Vtec) and Variable Valve Timing (Vtc ) System (Hatchback): Diagnosis Honda Civic VII рестайлинг

DTC Troubleshooting

DTC Index Table

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1. Reset the ECM (see «HOW TO UPDATE THE ECM»(ref-171994-S01671393282005021700000) ).
2. Start the engine. Hold the engine at 3,000 RPM with no load (in neutral) until the radiator fan comes on, then let it idle.
3. Test-drive at a steady speed between 20 - 40 mph (30 - 60 km/h) for 10 minutes. Is DTC P0010 indicated? YES: Go to step 4. NO: Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the VTC oil control solenoid valve and at the ECM.
4. Turn the ignition switch OFF.
5. Disconnect the ECM connector B (24P).
6. Measure resistance between ECM connector terminals B1 and B23. Is there 6.75 - 8.25 ? YES: Go to step 11 . NO: Go to step 7.
7. Disconnect the VTC oil control solenoid valve 2P connector.
8. Measure resistance between VTC oil control solenoid valve 2P terminals No. 1 and No. 2. Is there 6.75-8.25 ? YES: Go to step 9. NO: Replace the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(ref-172041-S42109466502005021800000) ).
9. Connect VTC oil control solenoid valve 2P connector terminals No. 1 and No. 2 to body ground with a jumper wire individually.
10. Check for continuity between ECM connector terminals B1 and B23 and body ground individually. Is there continuity? YES: Go to step 11. NO: Repair open in the wire between the ECM (B1, B23) and the VTC oil control solenoid valve.
11. Check for continuity between ECM connector terminals B1 and B23 and body ground individually. Is there continuity? YES: Go to step 12. NO: Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck (see «ECM UPDATING AND SUBSTITUTION FOR TESTING»(ref-171994-S19233909092005021700000) ). If the symptom/indication goes away with a known-good ECM, replace the original ECM.
12. Disconnect the VTC oil control solenoid valve 2P connector.
13. Check for continuity between ECM connector terminals B1 and B23 and body ground individually. Is there continuity? YES: Repair short in the wire between the ECM (B1, B23) and the VTC oil control solenoid valve. NO: Replace the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(ref-172041-S42109466502005021800000) ).

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1. Reset the ECM (see «HOW TO UPDATE THE ECM»(ref-171994-S01671393282005021700000) ).
2. Start the engine. Hold the engine at 3,000 RPM with no load (in neutral) until the radiator fan comes on.
3. Test-drive at a steady speed between 20-40 mph (30-60 km/h) for 10 minutes.
4. Check for Temporary DTC P0011 with the HDS or a scan tool. Is Temporary DTC P0011 indicated? YES: Go to step 5. NO: Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the VTC oil control solenoid valve and at the ECM.
5. Watch the low oil pressure light with the engine running. Is the low oil pressure light on? YES: Check the oil pressure (see «OIL PRESSURE TEST»(ref-172254-S28646888312005022300000) ). NO: Go to step 6.
6. Turn the ignition switch OFF.
7. Remove the auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REPLACEMENT»(ref-172320-S10118027702005022400000) ).
8. Remove the VTC strainer (A). Check the VTC strainer for clogging. Is the strainer OK? YES: Go to step 9. NO: Clean the VTC strainer, then replace the engine oil filter and the engine oil.
9. Check the VTC oil control solenoid valve (see «MIL CIRCUIT TROUBLESHOOTING»(ref-172003-S34898922342005021700000) ). Is the VTC oil control solenoid valve OK? YES: Go to step 10. NO: Clean the ports of the VTC oil control solenoid valve, or replace the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(ref-172041-S42109466502005021800000) ).
10. Install the VTC oil control solenoid valve.
11. Start the engine. Hold the engine at 700-1,000 RPM.
12. Connect ECM connector terminal B23 to body ground with a jumper wire.
13. Connect ECM connector terminals A3 and B1 with a jumper wire momentarily. NOTE: Do not jump for more than 1 minute. Did the engine stall or run rough? YES: Test-drive at a steady speed between 20-40 mph (30-60 km/h) for 10 minutes. If temporary DTC P0011 is indicated, update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck (see «ECM UPDATING AND SUBSTITUTION FOR TESTING»(ref-171994-S19233909092005021700000) ). If the symptom/indication goes away with a known-good ECM, replace the original ECM. NO: Go to step 14.
14. Check the VTC actuator (see «VTC ACTUATOR INSPECTION»(ref-173867-S35738139082005032300000) ). Is the VTC actuator OK? YES: Remove the auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REPLACEMENT»(ref-172320-S10118027702005022400000) ), and clean or replace the VTC oil strainer. Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck (see «ECM UPDATING AND SUBSTITUTION FOR TESTING»(ref-171994-S19233909092005021700000) ). If the symptom/indication goes away with a known-good ECM, replace the original ECM. NO: Replace the VTC actuator.

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1. Reset the ECM (see «HOW TO UPDATE THE ECM»(ref-171994-S01671393282005021700000) ).
2. Start the engine. Is DTC P0340 and/or P0344 indicated? YES: Go to step 3. NO: Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at CMP sensor A and at the ECM.
3. Turn the ignition switch OFF.
4. Disconnect the CMP sensor A 3P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between CMP sensor A 3P connector terminal No. 3 and body ground. Is there battery voltage? YES: Go to step 7. NO: Check the No. 4 ACG (10A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between CMP sensor A, and No. 4 ACG (10A) fuse.
7. Measure voltage between CMP sensor A 3P connector terminal No. 1 and body ground. Is there about 5 V? YES: Go to step 8. NO: Go to step 10 .
8. Measure voltage between CMP sensor A 3P connector terminals No. 2 and No. 3. Is there battery voltage? YES: Go to step 9. NO: Repair open in the wire between CMP sensor A and G101.
9. Substitute a known-good CMP sensor A and recheck. Is DTC P0340 and/or P0344 indicated? YES: Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck (see «ECM UPDATING AND SUBSTITUTION FOR TESTING»(ref-171994-S19233909092005021700000) ). If the symptom/indication goes away with a known-good ECM, replace the original ECM. NO: Replace the original CMP sensor A (see «CMP SENSOR A REPLACEMENT»(ref-172041-S15763790022005021800000) ).
10. Measure voltage between ECM connector terminal A25 and body ground. Is there about 5 V? YES: Repair open in the wire between the ECM (A25) and CMP sensor A. NO: Go to step 11.
11. Turn the ignition switch OFF.
12. Disconnect ECM connector A (31P).
13. Check for continuity between ECM connector terminal A25 and body ground. Is there continuity? YES: Repair short in the wire between the ECM (A25) and CMP sensor A. NO: Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck (see «ECM UPDATING AND SUBSTITUTION FOR TESTING»(ref-171994-S19233909092005021700000) ). If the symptom/indication goes away with a known-good ECM, replace the original ECM.