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A/t Interlock System: Overview Honda Civic IX

Automatic Trans 9 illustrations ~1489 words

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Scheme 123: Shift Lock System Circuit Troubleshooting
Scheme 123: Shift Lock System Circuit Troubleshooting

Note. Check for PGM FI DTCs and A/T DTCs. If any DTCs are present, troubleshoot those first.

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  1. Shift lock solenoid operation check: 1. Connect the HDS to the DLC (A) located under the driver's side of the dashboard. 2. Turn the ignition switch to ON (II). 3. Make sure the HDS communicates with the PCM. If it does not, go to the DLC circuit troubleshooting See DLC CIRCUIT TROUBLESHOOTING (K24Z7) or DLC CIRCUIT TROUBLESHOOTING (EXCEPT K24Z7) . 4. Select Shift Lock Solenoid Test in the Miscellaneous Test Menu, and check that the shift lock solenoid operates with the HDS. Does the shift lock solenoid work properly? YES: The shift lock solenoid is OK. Go to 7 . NO: Go to step 2.
  2. Fuse check: 1. Check the following fuse. Fuse No. B5 (7.5 A) Location Under-dash fuse/relay box Is the fuse OK? YES: The fuse is OK. Go to step 3. NO: Replace the No. B5 (7.5 A) fuse, and recheck. If the fuse blows again, repair a short to ground in the No. B5 (7.5 A) fuse circuit.
  3. Open wire check (IG1_METER line): 1. Turn the ignition switch to LOCK (0). 2. Remove the center console. See «CENTER CONSOLE DISASSEMBLY AND REASSEMBLY»(ref-614099-S42896054722014050700000) or «CENTER CONSOLE REMOVAL AND INSTALLATION»(ref-614099-S41879955902014050700000) 3. Disconnect the following connector. Shift lock solenoid 2P connector 4. Turn the ignition switch to ON (II). 5. Measure the voltage between test points 1 and 2. Test condition IG ON (II) Shift lock solenoid 2P connector: disconnected Test circuit IG1_METER Test point 1 Shift lock solenoid 2P connector No. 2 (YEL) Test point 2 Body ground Is there battery voltage? YES: The IG1_METER wire is OK. Go to step 4. NO: Repair an open in the IG1_METER wire between the shift lock solenoid 2P connector and the under-dash fuse/relay box.
  4. Determine possible failure area (short in SHIFT_LOCK_SOL line, open in SHIFT_LOCK_SOL line): 1. With the shift lever in P, press the brake pedal. NOTE: Do not press the accelerator pedal. 2. Measure the voltage between test points 1 and 2. Test condition IG ON (II) Shift lock solenoid 2P connector: disconnected Test circuit SHIFT_LOCK_SOL, IG1_METER Test point 1 Shift lock solenoid 2P connector No. 1 (PNK) Test point 2 Shift lock solenoid 2P connector No. 2 (YEL) Is there battery voltage? YES: Go to step 5. NO: Go to step 6 .
  5. Shorted wire check (SHIFT_LOCK_SOL line): 1. Release the brake pedal. NOTE: The shift lever must be in P. 2. Measure the voltage between test points 1 and 2. Test condition IG ON (II) Shift lock solenoid 2P connector: disconnected Test circuit SHIFT_LOCK_SOL, IG1_METER Test point 1 Shift lock solenoid 2P connector No. 1 (PNK) Test point 2 Shift lock solenoid 2P connector No. 2 (YEL) Is there battery voltage? YES: Repair a short to ground in the SHIFT_LOCK_SOL wire between the shift lock solenoid and the PCM. NO: The SHIFT_LOCK_SOL wire is OK. Check the shift lock mechanism. If the mechanism is OK, «REPLACE THE SHIFT LOCK SOLENOID»(/honda/civic/ix-2011-2015/remont/automatic-trans/#at-service-information) .
  6. Open wire check (SHIFT_LOCK_SOL line): 1. Turn the ignition switch to LOCK (0). 2. Jump the SCS line with the HDS. 3. Disconnect the following connector. PCM connector A (49P) 4. Check for continuity between test points 1 and 2. Test condition IG LOCK (0) Shift lock solenoid 2P connector: disconnected PCM connector A (49P): disconnected Test circuit SHIFT_LOCK_SOL Test point 1 Shift lock solenoid 2P connector No. 1 (PNK) Test point 2 PCM connector A (49P) No. 21 (PNK) Is there continuity? YES: The SHIFT_LOCK_SOL wire is OK. Update the PCM if it does not have the latest software See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) , or substitute a known-good PCM See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) , and recheck. If the symptom goes away with a known-good PCM, replace the original PCM See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) . NO: Repair an open in the SHIFT_LOCK_SOL wire between the shift lock solenoid and the PCM.
  7. Brake pedal position switch operation check: 1. Monitor the Brake Switch with the HDS in the A/T Data List, and press the brake pedal. Is the Brake Switch ON? YES: The brake pedal position switch is OK. Go to step 9 . NO: If the brake lights come on, go to step 8. If the brake lights do not work, repair faulty brake light circuit.
  8. Open wire check (STOP_SW line): 1. Turn the ignition switch to LOCK (0). 2. Jump the SCS line with the HDS. 3. Disconnect the following connector. PCM connector A (49P) 4. Measure the voltage between test points 1 and 2. Test condition IG LOCK (0) PCM connector A (49P): disconnected Test circuit STOP_SW Test point 1 PCM connector A (49P) No. 13 (LT GRN) Test point 2 Body ground Is there battery voltage while pressing the brake pedal and about 0 V when the pedal is released? YES: The STOP_SW wire is OK. Update the PCM if it does not have the latest software See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) , or substitute a known-good PCM See «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) , «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) or ECM/PCM UPDATE , and recheck. If the symptom goes away with a known-good PCM, replace the original PCM See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) . NO: Repair an open in the STOP_SW wire between the PCM and the brake pedal position switch.
  9. Transmission range switch operation check: 1. Monitor the A/T P Switch with the HDS in the A/T Data List with the shift lever in P. Is the A/T P Switch ON? YES: Go to step 12 . NO: Go to step 10.
  10. ATP_P signal check: 1. Turn the ignition switch to LOCK (0). 2. Disconnect the following connector. Transmission range switch 10P connector 3. Connect terminals A and B with a jumper wire. Terminal A Transmission range switch 10P connector No. 10 (BLK/BLU) Terminal B Body ground 4. Turn the ignition switch to ON (II). 5. Monitor the A/T P Switch with the HDS in the A/T Data List. Is the A/T P Switch ON? YES: The ATP_P signal is OK. «REPLACE THE TRANSMISSION RANGE SWITCH»(/honda/civic/ix-2011-2015/remont/automatic-trans/#at-service-information) . NO: Go to step 11.
  11. Open wire check (ATP_P line): 1. Turn the ignition switch to LOCK (0). 2. Remove the jumper wire. 3. Jump the SCS line with the HDS. 4. Disconnect the following connector. PCM connector B (49P) 5. Check for continuity between test points 1 and 2. Test condition IG LOCK (0) Transmission range switch 10P connector: disconnected PCM connector B (49P): disconnected Test circuit ATP_P Test point 1 Transmission range switch 10P connector No. 10 (BLK/BLU) Test point 2 PCM connector B (49P) No. 24 (BLU/BLK) Is there continuity? YES: The ATP_P wire is OK. Update the PCM if it does not have the latest software See «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) , «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) or ECM/PCM UPDATE , or substitute a known-good PCM See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) , and recheck. If the symptom goes away with a known-good PCM, replace the original PCM See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) . NO: Repair an open in the ATP_P wire between the transmission range switch and the PCM.
  12. APP Sensor A signal check: 1. Check APP Sensor A with the HDS in the A/T Data List. Do not press the accelerator pedal. Is the APP Sensor (%) opening 5 % or more, or is APP Sensor A (V) 1.16 V or higher? YES: Check the APP sensor See APP SENSOR SIGNAL INSPECTION (EXCEPT K24Z7) or APP SENSOR SIGNAL INSPECTION (K24Z7) . NO: The APP Sensor A signal is OK. Update the PCM if it does not have the latest software See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) , or substitute a known-good PCM See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) , and recheck. If the symptom goes away with a known-good PCM, replace the original PCM See «ECM REMOVAL AND INSTALLATION (K24Z7)»(ref-614093-S42243049962014050700000) , ECM/PCM UPDATE or «ECM/PCM REMOVAL AND INSTALLATION (Except K24Z7 and R18Z1 (CVT))»(ref-614093-S04499420502014050700000) .

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