Immobilizer-Keyless Control Unit Input Test
NOTE:
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC ChecksBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not CommunicatingBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFFBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
- SRS components are located in this area. Review the SRS component locations , and precautions and procedures before doing repairs or servicing.
- Before testing, make sure the No. A29 (10 A) fuse in the under-hood fuse/relay box is OK.
- Before testing, make sure the No. B4 (15 A) fuse in the under-dash fuse/relay box is OK.
1. Turn the vehicle to the OFF (LOCK) mode
2. Disconnect the following connector.
| Immobilizer-keyless control unit 7P connector |
3. Inspect the connector and socket terminals to be sure they are all making good contact:
- If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
- If the terminals are OK, go to step 4.
4. With the connector still disconnected, do the following input tests:
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 5.
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 2 | YEL | Jump the SCS line with the HDS, and wait more than 1 minute, disconnect the PCM connector A (51P) | Measure the voltage to ground: There should be about 5 V. |
|
| Check for continuity between terminal and PCM connector A (51P) terminal No. 21: There should be continuity. |
|
|||
| Disconnect the 12 volt battery negative terminal | Measure the resistance between terminal and body ground: There should be more than 50 kΩ. |
|
5. Reconnect the connector to the immobilizer-keyless control unit, do the following input tests:
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, replace the immobilizer-keyless control unit .
NOTE: After replacing the immobilizer-keyless control unit, and do the immobilizer key registration .
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 7 | RED | Under all conditions | Measure the voltage to ground: There should be battery voltage. |
|
| 6 | BLU | Vehicle ON mode | Measure the voltage to ground: There should be battery voltage. |
|
| 1 | BRN | In all ignition switch positions | Measure the voltage to ground:There should be less than 0.2 V. |
|
| 3 | LT BLU | Under all conditions | Measure the voltage to ground:There should be pulse voltage (digital signal). |
|