Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP1997GRAND CHEROKEE TSI, 5.2 Y, AWDREPAIR AND DIAGNOSISBODY & FRAMEBODY, CAB CONTROL SYSTEMSBODY CONTROL COMPUTERTESTINGVEHICLE COMMUNICATIONSTEST 9A - NO RESPONSE FROM POWERTRAIN CONTROL MODULE
1997 Jeep Grand Cherokee TSi, 5.2 Y, AWD
Test 9A - No Response From Powertrain Control Module
1997 Jeep Grand Cherokee TSi, 5.2 Y, AWDSECTION Test 9A - No Response From Powertrain Control Module
- If engine does not run, see appropriate ENGINE PERFORMANCE article in the ENGINE PERFORMANCE section. If engine runs, turn ignition off. Disconnect Powertrain Control Module (PCM). PCM is located at right corner of firewall. Turn ignition on. Connect jumper wire between ground and terminal C30 (Violet/Brown wire) on PCM connector.
- 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 Violet/Brown wire. If scan tool displays BUS SHORT TO GROUND, go to next step.
- Move jumper wire to terminal C28 (White/Black wire) on PCM connector. Perform CCD BUS test. If scan tool does not display BUS SHORT TO GROUND, repair open White/Black wire. If scan tool displays BUS SHORT TO GROUND, replace PCM.
NOTE:
For connector terminal ID, see CONNECTOR IDENTIFICATION
and WIRING DIAGRAM. Perform VERIFICATION TEST VER-1 after each repair.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.