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 MANUALSTOYOTA1999CAMRY XLE, 2.2 GREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEM W/TRACTION CONTROL SYSTEMDIAGNOSTIC TESTSDTC 44: NE SIGNALDIAGNOSTIC PROCEDURE
1999 Toyota Camry XLE, 2.2 G
Diagnostic Procedure
1999 Toyota Camry XLE, 2.2 GSECTION Diagnostic Procedure
- Check for open or short circuit in wiring harness Brown/White wire between terminal NEO (connector A16-15, Brown/White wire) at ABS/TRAC ECU and terminal NEO at ECM (connector E8 terminal No. 16). Repair as necessary. See WIRING DIAGRAMS . If circuit is okay, go to next step.
- Remove ABS/TRAC ECU. Do not disconnect electrical connectors. Measure voltage between ground and terminal NEO at ABS/TRAC ECU with ignition switch in ON position and engine off. Voltage should be 3-6 volts or less than one volt. With engine started and idling, voltage should be 2-3 volts and pulsating every 3 milliseconds. If voltage is as specified, go to next step. If voltage is not as specified, substitute a known-good ABS/TRAC ECU and retest system. If problem is still present, replace ECM.
- Clear DTCs and then recheck for DTCs. See RETRIEVING DTCS under DIAGNOSIS & TESTING. If same DTC is output after DTC is cleared, check contact condition of each connection. Repair as necessary.
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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.