LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2000 >> ES 300 >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Circuit Tests >> Diagnostic Circuit
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Diagnostic Circuit

  1. Turn ignition on. Measure voltage between terminals Tc and E1 of Data Link Connector 2 (DLC2) located under left side of instrument panel. See Figure. Voltage should be 10-14 volts. If voltage is not as specified, go to next step. If voltage is as specified, perform next procedure listed in SYMPTOM DIAGNOSIS  table under TROUBLE SHOOTING.
  2. Check wiring and connectors between DLC2, cruise control ECU and ground connection. Repair or replace as necessary. If wiring and connectors are okay, check cruise control ECU. See CRUISE CONTROL ECU PIN VOLTAGE TESTS  under COMPONENT TESTS. If cruise control ECU is defective, replace ECU.
scientia non olet · About LEMON Manuals