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Home >> Toyota >> 2005 >> Corolla S, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control System (W/ETCS-I) - Diagnostics >> Problem Symptoms Table

Problem Symptoms Table

If a normal system code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.

HINT:

Inspect the "Fuse" and "Relay" before confirming the suspected areas as shown in the table below.

Inspect each malfunction circuit in numerical order for the corresponding symptom.

PROBLEM SYMPTOMS TABLE - CRUISE CONTROL SYSTEM (W/ ETCS)

Symptom Suspected Area
Main switch cannot be turned ON.
(Cruise indicator light in combination meter does not come on.)
  1. Cruise control switch circuit
  2. Combination meter system (CRUISE main indicator light circuit)
  3. ECM
  4. Combination meter assy
Vehicle speed setting cannot be done.
(Although indicator light in combination meter comes on when the main switch is turned ON, it goes off when vehicle speed is set.)
  1. Cruise control switch circuit
  2. ECM
Setting cannot be done.
(Indicator light in combination meter comes on when the main switch is turned ON and it remains ON while setting.)
  1. Cruise control switch circuit
  2. Vehicle speed sensor circuit (DTC P0500/21, P0503/23)
  3. Stop lamp switch circuit (DTC P0571/52)
  4. Combination meter system (CRUISE main indicator light circuit)
  5. Clutch switch circuit (Manual Transaxle)
  6. Park/neutral position switch circuit (DTC P0705)
  7. ECM
  8. Combination meter assy
While the vehicle is driven with cruise control, the set control is cancelled. (Indicator light and CRUISE remain ON.)
  1. Cruise control switch circuit
  2. Vehicle speed sensor circuit (DTC P0500/21, P0503/23)
  3. Stop lamp switch circuit (DTC P0571/52)
  4. Combination meter system (CRUISE main indicator light circuit)
  5. Clutch switch circuit (Manual Transaxle)
  6. Park/neutral position switch circuit (DTC P0705)
  7. ECM
  8. Combination meter assy
Hunting (Speed is not constant.)
  1. Vehicle speed sensor circuit (DTC P0500/21, P0503/23)
  2. ECM
Setting cannot be cancelled. (When Coast, Acceleration, Resume, Set speed change and Control switch are operated.)
  1. Cruise control switch circuit
  2. ECM
DTC is not output, or is output when should not be.
  1. Diagnosis circuit
CRUISE main indicator light does not come on.
  1. Cruise control switch circuit
  2. Combination meter system (CRUISE main indicator light circuit)
  3. ECM
  4. Combination meter assy
Fig 1: Identifying Terminals Of ECU
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