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HOMESERVICE MANUALSCHEVROLET1990S10/T10 P/U 4WD V6-262 4.3LREPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLANTILOCK BRAKES / TRACTION CONTROL SYSTEMSELECTRONIC BRAKE CONTROL MODULESERVICE AND REPAIR
1990 Chevrolet S10/T10 P/U 4WD V6-262 4.3L

Electronic Brake Control Module: Service and Repair

1990 Chevrolet S10/T10 P/U 4WD V6-262 4.3LSECTION Service and Repair

RWAL ECU And Isolation/Dump Valve:






RWAL ELECTRONIC CONTROL UNIT
The RWAL Electronic Control Unit (ECU) is not serviceable. It should be replaced when the diagnosis charts show it to be malfunctioning.

CAUTION: Do not touch the electrical connections and pins or allow them to come into contact with brake fluid as this will damage the RWAL ECU.

REMOVE OR DISCONNECT
1. Electrical connectors.
2. RWAL ECU by prying the tab at the rear of the ECU and pulling it toward the front of the vehicle.

INSTALL OR CONNECT
1. RWAL ECU by sliding it into the bracket until the tab locks into the hole.
2. Electrical connectors.

NOTE: If there is brake fluid on the connectors, clean them with water followed by Isopropyl alcohol.
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.