Immobilizer-Keyless Control Unit Input Test
- Remove the steering column covers (see COLUMN COVER REMOVAL/INSTALLATION ).
- Disconnect the up connector (A) from the immobilizer-keyless control unit (B).
- 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 look OK, go to step 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.
IMMOBILIZER-KEYLESS CONTROL UNIT INPUT TEST REFERENCECavity Wire Terminal name Test condition Test: Desired result Possible cause if desired result is not obtained 4 GRN B-CAN Disconnect the gauge control module 32P connector Check for continuity between the terminal No. 4 and the gauge control module 32P connector terminal No. 31: There should be continuity. An open or high resistance in the wire Disconnect under-dash fuse/relay box connector Y (16P) Check for continuity between the terminal No. 4 and under-dash fuse/relay box connector Y (16P) terminal No. 6: There should be continuity. An open or high resistance in the wire 5 PNK AMMCO (S-NET) Disconnect ECM/PCM connector A (44P)(1) (see HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM CONNECTORS ) Measure the voltage to ground: There should be about 5 V. - A short to ground in the wire
- An open or high resistance in the wire
Disconnect the battery negative terminal Measure the resistance between the terminal No. 5 and body ground: There should be more than 50 kΩ. - Faulty imoes unit (built into the MICU)
- Faulty under-dash fuse/relay box
- An open or high resistance in the wire
Disconnect ECM/PCM connector A(44P)(1) (see HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM CONNECTORS ) Check for continuity between the terminal No. 5 and ECM/PCM connector A (44P) terminal No. 44: There should be continuity. An open or high resistance in the wire (1) To disconnect the ECM/PCM connectors, turn the ignition switch to LOCK (0) and jump the SCS line with the HDS. - Reconnect the connector to the immobilizer-keyless control unit, and 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 (see PROGRAMMING IMMOBILIZER-KEYLESS CONTROL UNIT
).NOTE: After replacing the immobilizer-keyless control unit, do the immobilizer registration (see IMMOBILIZER KEY REGISTRATION ).
IMMOBILIZER-KEYLESS CONTROL UNIT INPUT TEST REFERENCECavity Wire Terminal name Test condition Test: Desired result Possible cause if desired result is not obtained 7 PNK + B BACK UP Under all conditions Measure the voltage to ground: There should be battery voltage. - Blown No. B1 (15 A) fuse in the under-dash fuse/relay box
- An open or high resistance in the wire
6 BRN IG1 Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. - Blown No. B20 (15 A) fuse in the under-dash fuse/relay box
- An open or high resistance in the wire
2 GRY KEY SW Ignition key inserted into the ignition switch Measure the voltage to ground: There should be less than 0.2 V. - Poor ground(G502)
- Faulty ignition key switch
- An open or high resistance in the wire
1 BRN LG In all ignition switch position Measure the voltage to ground: There should be less than 0.2 V. - Poor ground(G101)
- An open or high resistance in the wire
3 BLU K-LINE Under all conditions Measure the voltage to ground: There should be pulse voltage (digital signal). - Faulty control unit on the K-line
- Short to ground in the K-line wire