Immobilizer-keyless Control Unit Input Test
NOTE:
Before troubleshooting the immobilizer system, refer to B-CAN System Diagnosis Test Mode A (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
) and check the No. 2 (20 A) fuse in the under-dash fuse/relay box and fuse No. 23 (10 A) in the under-hood fuse box.
- Remove the steering column covers (see COLUMN COVER REMOVAL/INSTALLATION ).
- Disconnect the 7P 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 5.
- With the connector still disconnected, make these input tests at the connector.
- 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.
SYMPTOM TROUBLESHOOTINGCavity Wire (Signal) Test condition Test: Desired result Possible cause if desired result is not obtained 1 GRN (VBV, +B) Under all conditions Measure the voltage between immobilizer-keyless control unit 7P connector No. 1 terminal and body ground:
There should be battery voltage.- Blown No. 23 (10 A) fuse in the under-hood fuse/relay box
- An open in the wire
2 YEL (IG1) Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. - Blown No. 2 (15 A) fuse in the under-dash fuse/relay box
- An open in the wire
- Reconnect the connectors to the immobilizer-keyless control unit, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the immobilizer-keyless control unit must be faulty; replace it.
SYMPTOM TROUBLESHOOTINGCavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 7 BRN (LG1) Under all conditions Measure the voltage to ground: There should be less than 0.5 V. - Poor ground (G101)
- An open in the wire
6 PNK (IGKEYSW) Ignition key inserted into the ignition switch Measure the voltage to ground: There should be less than 0.5 V. - Poor ground (G502)
- Faulty ignition key switch
- An open in the wire