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.
Pinpoint Test K: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool
Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network for schematic and connector information.
Refer to appropriate SYSTEM WIRING DIAGRAMS article, Supplemental Restraint System for schematic and connector information.
Normal Operation
The restraints control module (RCM) communicates with the scan tool through the International Standards Organization (ISO) 9141 network. Circuit 70 (LB/WH) provides the network connection to the RCM. The RCM shares the ISO network with the fire suppression system module (FSSM) (if equipped). Voltage for the RCM is provided by circuit 937 (RD/WH). Circuit 676 (PK/OG) provides ground.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- RCM
PINPOINT TEST K: THE RESTRAINTS CONTROL MODULE (RCM) DOES NOT RESPOND TO THE SCAN TOOL
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.