No Response From Smart Key Immobilizer Module (Skim)
NOTE:
For connector terminal identification and wiring diagrams, see
BODY CONTROL COMPUTER - INTRODUCTION article. Perform VERIFICATION TEST VER-1
after each repair.
CAUTION:
Always turn ignition off prior to disconnecting any module connector.
- Using scan tool select BODY COMPUTER, SYSTEM TEST then PCM MONITOR. If scan tool does not display PCM ACTIVE ON THE BUS, go to PCM MESSAGE NOT RECEIVED (NO RESPONSE FROM PCM) . If scan tool displays PCM ACTIVE ON THE BUS, go to next step.
- Disconnect Smart Key Immobilizer Module (SKIM). SKIM is located at ignition lock cylinder. Turn ignition off. Using external ohmmeter, measure resistance between ground and SKIM connector terminal No. 2 (Black wire). If resistance is 5 ohms or more, repair open Black wire. If resistance is less than 5 ohms, go to next step.
- Using an external voltmeter, measure voltage between ground and SKIM connector terminal No. 1 (Pink wire). If voltage is 10 volts or less, repair open Pink wire. If voltage is more than 10 volts, go to next step.
- Turn ignition on. Measure voltage between ground and SKIM connector terminal No. 3 (Light Green/Black wire). If voltage is 10 volts or less, repair open Light Green/Black wire. If voltage is more than 10 volts, go to next step.
- Connect jumper wire between ground and SKIM connector terminal No. 5 (White/Dark Blue wire). Using scan tool, select BODY, BODY COMPUTER, then SYSTEM TEST. Perform CCD BUS test. If scan tool does not display BUS SHORT TO GROUND, repair open White/Dark Blue wire. If scan tool displays BUS SHORT TO GROUND, go to next step.
- Move jumper wire to terminal No. 6 (Violet/Brown wire). Perform CCD BUS test. If scan tool does not display BUS SHORT TO GROUND, repair open Violet/Brown wire). If scan tool displays BUS SHORT TO GROUND, replace SKIM.