Immobilizer-Keyless Control Unit Input Test
NOTE:
SRS components are located in this area. Review the SRS component locations (see
COMPONENT LOCATION INDEX
), and precautions and procedures (see
PRECAUTIONS AND PROCEDURES
) before doing repairs or servicing.
- 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 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 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. 17: There should be continuity. An open in the B-CAN wire Disconnect under-dash fuse/relay box connector Q(16P) Check for continuity between the terminal No. 4 and under-dash fuse/relay box connector Q (16P) terminal No. 3: There should be continuity. An open in the B-CAN wire 3 GRN S-NET Disconnect PCM connector A (49P) (see HOW TO TROUBLESHOOT CIRCUITS AT THE PCM CONNECTORS ) Measure the voltage to ground: There should be about 5 V. - A short to ground in the wire
- An open in the wire
Disconnect the battery negative terminal Measure the resistance between terminal 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 in the S-NET wire
Disconnect PCM connector A (49P) (see HOW TO TROUBLESHOOT CIRCUITS AT THE PCM CONNECTORS ) Check for continuity between the terminal No. 3 and PCM connector A (49P) terminal No. 46: There should be continuity. An open in the wire
- 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 IMMOBILIZER-KEYLESS CONTROL UNIT REGISTRATION ).NOTE: After replacing the immobilizer-keyless control unit, do the immobilizer registration (see IMMOBILIZER KEY REGISTRATION ).
Cavity Wire Terminal name Test condition Test: Desired result Possible cause if desired result is not obtained 1 PNK + B BACK UP Under all conditions Measure the voltage to ground: There should be battery voltage. - Blown No. 1 (15 A) fuse in the under-dash fuse/relay box
- An open or high resistance in the wire
2 RED IG1 Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. - Blown No. 20 (15 A) fuse in the under-dash fuse/relay box
- An open or high resistance in the wire
6 GRY KEYSW Ignition key inserted into the ignition switch Measure the voltage to ground: There should be less than 0.2 V. - Poor ground (G502) or an open in the ground wire
- Faulty ignition key switch
- An open or high resistance in the wire
7 BRN LG Under all conditions Measure the voltage to ground: There should be less than 0.2 V. - Poor ground(G101)or an open in the ground wire
- An open or high resistance in the wire
5 BLU K-LINE Under all conditions Measure the voltage to ground: There should be 9-12V. - Faulty control unit on the K-line
- A short to ground in the K-line wire