Test 9 A: No Response From Powertrain Control Module
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 ENGINE and read PCM DTCs. If scan tool displays NO RESPONSE, go to TEST NS-6A in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If scan tool does not display NO RESPONSE, go to next step.
- Turn ignition off and disconnect both battery cables. Disconnect Powertrain Control Module (PCM). PCM is located next to air cleaner. Using external ohmmeter, measure resistance of Violet/Yellow wire between PCM Gray 80-pin connector C2 terminal No. 59 and DLC terminal No. 2. If resistance is 320-2000 ohms, replace PCM. If resistance is not 320-2000 ohms, repair open Violet/Yellow wire.