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Problem Symptoms Table

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS TABLE - CRUISE CONTROL SYSTEM

Symptom Suspected Area
Main switch cannot be turned ON.
(Indicator light on the combination meter does not come on.)
  1. Cruise control switch circuit
  2. CRUISE MAIN indicator light circuit
  3. ECM
Speed setting cannot be done.
(Indicator light on the combination meter comes on when the main switch is turned ON, but goes off when operating 'SET' function.)
  1. Cruise control switch circuit
  2. ECM
Speed setting cannot be done
(Indicator light on the combination meter comes on when the main switch is turned ON, and it remains ON while operating 'SET' function.)
  1. Cruise control switch circuit
  2. Stop lamp switch circuit
  3. Park/Neutral position switch circuit
  4. Combination meter system
  5. ECM
While cruise control driving, the set speed is canceled. (Indicator light remains ON.)
  1. Cruise control switch circuit
  2. Vehicle speed sensor circuit
  3. Stop lamp switch circuit
  4. CRUISE MAIN indicator light circuit
  5. Park/Neutral position switch circuit
  6. ECM
Hunting occurs.
(Speed is not constant.)
  1. Vehicle speed sensor circuit
  2. ECM
Speed setting cannot be canceled.
('CANCEL' function failure ONLY)
  1. Cruise control switch circuit
  2. ECM
DTC is not output, or is output when should not be.
  1. DLC3 circuit
  2. ECM
CRUISE MAIN indicator light does not come on.
  1. Cruise control switch circuit
  2. CRUISE MAIN indicator circuit
  3. ECM
  4. Combination meter assy