Honda CIVIC 10G 2016 Immobilizer System Page 1

Immobilizer System Description - Components
Security Indicator
When vehicle ON mode is entered, the authentication of the immobilizer key starts and the indicator is off. When the key is
successfully authenticated, the indicator stays off. When the key is not successfully authenticated, the indicator blinks, the vehicle is
turned to the OFF (LOCK) mode, and then the indicator goes off after blinking several times. For details on the illumination pattern,
refer to
immobilizer system symptom troubleshooting information.
Ignition Key
Vehicles equipped with the immobilizer system have an identification marking on the mechanical key. Consider this identification
marking as a proof of the vehicle having the immobilizer system.
Immobilizer System Description - Components 1871 http://techinfo.honda.com/rjanisis/pubs/sm/1/2/Contents/enu/61TBAD/...
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Contents Summary of Immobilizer System

  • Page 1Immobilizer System Description - Components Security Indicator When vehicle ON mode is entered, the authentication of the immobilizer key starts and the indicator is off. When the key is successfully authenticated, the indicator stays off. When the key is not successfully authenticated, the indicato
  • Page 2Immobilizer System Description - Control/Function Immobilizer Function An immobilizer system adds a second electronic layer of security to the vehicle. If the key matches mechanically, but the electronic check does not match, the PCM suspends fuel delivery and shuts down the engine. Refer to the key
  • Page 3Immobilizer System Description - System Diagram For locations of each component on the vehicle, refer to the Component Location Index cardiagn.com
  • Page 4Immobilizer System Circuit Diagram cardiagn.com
  • Page 5Immobilizer System Circuit Diagram cardiagn.com
  • Page 6Immobilizer System Component Location Index cardiagn.com
  • Page 7cardiagn.co
  • Page 8Immobilizer System Registration 1. Immobilizer-Keyless Control Unit - Register NOTE: The HDS is required for registration of the immobilizer keys. Programming the immobilizer also programs the keyless transmitter. Check for aftermarket electrical equipment that can cause problems with transponder op
  • Page 9Immobilizer System Status Log If you suspect there is an immobilizer system problem, check the status log in the HDS. 1. Connect the HDS to the data link connector (DLC). 2. Turn the vehicle to the ON mode. 3. On the HDS screen, at SYSTEM SELECTION MENU, enter IMMOBI, then select IMMOBILIZER SETUP,
  • Page 10Status Log No. Detected Item Probable Cause D-1 S-NET LINE PROBLEM Low 12 volt battery voltage 1 Poor or loose terminal connections at the immobilizer-keyless (Short to ground) control unit and the PCM Communication line electrical noise D-2 S-NET LINE PROBLEM Blown fuse 2 Harness open from imoes un
  • Page 11Immobilizer Key Registration 1. Immobilizer Key - Register NOTE: The HDS is required for registration of the immobilizer keys. Programming the immobilizer also programs the keyless transmitter. Check for aftermarket electrical equipment that can cause problems with transponder operation. The immobil
  • Page 12password from the iN system. 2. Connect the HDS to the data link connector (DLC). 3. Turn the vehicle to the ON mode. 4. Select IMMOBI from the SYSTEM SELECTION MENU, then select IMMOBILIZER SETUP. 5. Select ADD AND DELETE KEYS, or DELETE OR ADD MULTIPLE KEYS. 6. Do the registration according to the
  • Page 138. When prompted by the HDS, do the keyless transmitter programming. 9. Make sure the keyless transmitter's operation works properly. cardiagn.com
  • Page 14Immobilizer System Check 1. Connect the HDS to the data link connector (DLC). 2. Turn the vehicle to the ON mode. 3. Monitor the SYSTEM CHECK in IMMOBILIZER INFO with the HDS. NOTE: If the HDS does not communicate with the immobilizer-keyless control unit, check the power, ground, and K LINE connect
  • Page 15System Check System Check Possible Cause No. C-1 Imoes unit is not Imoes unit was not registered. registered No communication between the imoes unit and the immobilizer- keyless control unit because of low 12 volt battery voltage. No communication between the imoes unit and the immobilizer- keyless
  • Page 16Immobilizer System Symptom Troubleshooting - Engine does not start with the immobilizer key cardiagn.com Engine does not start with the immobilizer key NOTE: Before troubleshooting, check the items listed in General Check before Troubleshooting. 1. Problem verification: ‐1. Try to start the engine.
  • Page 17Does the starter motor run? YES Go to step 4. NO Go to starting system, and check the starter motor.■ 4. PGM-FI system check 1: ‐1. Try to start the engine with the immobilizer key. Does the engine start? YES Go to step 5. NO Go to the PGM-FI system symptom troubleshooting.■ 5. PGM-FI system check 2
  • Page 18Immobilizer System Symptom Troubleshooting - Security indicator blinks cardiagn.com Security indicator blinks NOTE: Before troubleshooting, check the items listed in General Check before Troubleshooting. 1. Immobilizer system check: ‐1. Connect the HDS to the data link connector (DLC). ‐2. Turn the
  • Page 19YES The GND wire is OK. Go to step 3. NO Repair an open or high resistance in the ground wire or poor ground (G503).■ 3. Open wire check (IG1 MON line): ‐1. Turn the vehicle to the ON mode. ‐2. Measure the voltage between test points 1 and 2. Test condition Vehicle ON mode Test point 1 Immobilizer-k
  • Page 20Immobilizer System Symptom Troubleshooting - Security indicator blinks cardiagn.com Security indicator blinks NOTE: Before troubleshooting, check the items listed in General Check before Troubleshooting. 1. Immobilizer system check: ‐1. Connect the HDS to the data link connector (DLC). ‐2. Turn the
  • Page 21YES The GND wire is OK. Go to step 3. NO Repair an open or high resistance in the ground wire or poor ground (G503).■ 3. Open wire check (IG1 FUEL PUMP line): ‐1. Turn the vehicle to the ON mode. ‐2. Measure the voltage between test points 1 and 2. Test condition Vehicle ON mode Test point 1 Immobil
  • Page 22Immobilizer System Symptom Troubleshooting - Security indicator turns on Security indicator turns on 1. Immobilizer system check: ‐1. Connect the HDS to the data link connector (DLC). ‐2. Turn the vehicle to the ON mode. ‐3. From the SYSTEM SELECTION MENU, enter IMMOBI, then select IMMOBILIZER INFO.
  • Page 23Immobilizer System Symptom Troubleshooting Index Troubleshoot the immobilizer system in the order shown: Order of Symptom Possible cause Priority 1 Security indicator blinks. Symptom troubleshooting. 2 Engine does not start with the immobilizer key. Symptom troubleshooting. 3 Security indicator turn
  • Page 24Immobilizer System Symptom Troubleshooting Information General Check Before Troubleshooting Before troubleshooting the immobilizer system, check the following general items and resolve any issues, if applicable: The 12 volt battery is low; charge the 12 volt battery fully, then troubleshoot the immo
  • Page 25cardiagn.com System Check NOTE: The HDS can be used to check the state of the immobilizer key registration and the S-NET line by doing a SYSTEM CHECK. 1. Connect the HDS to the data link connector (DLC). NOTE: If the HDS does not communicate with the vehicle, go to the DLC Circuit Troubleshooting. 2
  • Page 26Immobilizer System Symptom Troubleshooting Information General Check Before Troubleshooting Before troubleshooting the immobilizer system, check the following general items and resolve any issues, if applicable: The 12 volt battery is low; charge the 12 volt battery fully, then troubleshoot the immo
  • Page 27cardiagn.com System Check NOTE: The HDS can be used to check the state of the immobilizer key registration and the S-NET line by doing a SYSTEM CHECK. 1. Connect the HDS to the data link connector (DLC). NOTE: If the HDS does not communicate with the vehicle, go to the DLC Circuit Troubleshooting. 2
  • Page 28Immobilizer-Keyless Control Unit Connector for Inputs and Outputs Terminal Terminal name Description Signal number 1 GND Ground for immobilizer-keyless control unit Less than 0.2 V at all times 2 S-NET Communication line ――― 3 K LINE Communication line ――― 4 B-CAN_H Communication line ――― 5 B-CAN_L
  • Page 29Immobilizer-Keyless Control Unit Connector for Inputs and Outputs Terminal Terminal name Description Signal number 1 GND Ground for immobilizer-keyless control unit Less than 0.2 V at all times 2 S-NET Communication line ――― 3 K LINE Communication line ――― 4 B-CAN_H Communication line ――― 5 B-CAN_L
  • Page 30Immobilizer-Keyless Control Unit Input Test NOTE: SRS components are located in this area. Review the SRS component locations, and precautions and procedures before performing repairs or servicing. Before testing, make sure the No. A18 (10 A) fuse in the under-hood fuse/relay box is OK. Before testi
  • Page 31Cavity Wire Terminal Test condition Test: Desired result Possible cause if desired result is name not obtained 7 RED +B Under all Measure the voltage to Blown No. A18 (10 A) fuse in the BACK conditions ground: under-hood fuse/relay box UP There should be battery An open or high resistance in the vol
  • Page 32Immobilizer-Keyless Control Unit Input Test NOTE: SRS components are located in this area. Review the SRS component locations, and precautions and procedures before performing repairs or servicing. Before testing, make sure the No. A18 (10 A) fuse in the under-hood fuse/relay box is OK. Before testi
  • Page 33Cavity Wire Terminal Test condition Test: Desired result Possible cause if desired result is name not obtained 7 RED +B Under all Measure the voltage to Blown No. A18 (10 A) fuse in the BACK conditions ground: under-hood fuse/relay box UP There should be battery An open or high resistance in the vol
  • Page 34Immobilizer-Keyless Control Unit Removal and Installation SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service. NOTE: If the immobilizer-keyless control unit is replaced, do the immobilizer-keyless control unit