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 MANUALSPONTIAC1990GRAND PRIX STE, 3.1 VREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEMDIAGNOSIS & TESTINGABS-III DIAGNOSTICS CANNOT BE ENTERED
1990 Pontiac Grand Prix STE, 3.1 V
Abs-III Diagnostics Cannot Be Entered
1990 Pontiac Grand Prix STE, 3.1 VSECTION Abs-III Diagnostics Cannot Be Entered
If power or ground supply to anti-lock brake controller is lost, the anti-lock brake system will be disabled and the Amber ANTI-LOCK warning light will come on.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- Determines if voltage is being applied to anti-lock brake controller at terminal 1C16.
- Indicates whether fault is due to open condition or possible short to ground in circuit No. 640.
- Determines if voltage is being applied to anti-lock brake controller at terminal 1D15.
- If resistance is infinite, one or both of the anti-lock brake controller ground circuits are open.
- If resistance is infinite, one or both of the anti-lock brake controller ground circuits are open.
- If resistance is infinite, an open condition exists in data line circuit No. 461, preventing controller from communicating with scanner.
- A short to ground has prevented communication between anti-lock brake controller and ECM. If connector has good contact and short cannot be found, replace anti-lock brake controller.
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.