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Problem Symptoms Table

PROBLEM SYMPTOMS TABLE - CRUISE CONTROL SYSTEM

Symptom Suspect Area
SET not occurring or CANCEL occurring. (DTC is Normal)
  1. Input Signal Circuit
  2. Vehicle Speed Sensor Circuit
  3. Stop Light Switch Circuit
  4. Park/Neutral Position Switch Circuit
  5. Hybrid vehicle control ECU
SET not occurring or CANCEL occurring. (DTC is not output)
  1. Hybrid vehicle control ECU
Actual vehicle speed deviates above or below the set speed.
  1. Input Signal Circuit
  2. Hybrid vehicle control ECU
Gear shifting occurs frequently between 3rd and O/D when driving on uphill road. (Hurting)
  1. Hybrid vehicle control ECU
Cruise control not cancelled, even when brake pedal is depressed.
  1. Stop Light Switch Circuit
  2. Hybrid vehicle control ECU
Cruise control not cancelled, even when transmission is shifted to "N" position.
  1. Park/Neutral Position Switch Circuit
  2. Hybrid vehicle control ECU
Control switch does not operate. (SET/COAST, ACC/RES, CANCEL not possible)
  1. Cruise Control Switch Circuit
  2. Hybrid vehicle control ECU
SET possible at 40 km/h (25 mph) or less, or CANCEL does not operate at 40 km/h (25 mph) or less.
  1. Input Signal Circuit
  2. Hybrid vehicle control ECU
Poor response is ACCEL and RESUME modes.
  1. Hybrid vehicle control ECU
O/D does not resume, even though the road is not uphill.
  1. Hybrid vehicle control ECU
DTC memory is erased.
  1. Hybrid vehicle control ECU
DTC is not output, or is output when should not be.
  1. Diagnosis Circuit
  2. Hybrid vehicle control ECU
Cruise MAIN indicator light remains ON or falls to light up.
  1. Input Signal Circuit
  2. Hybrid vehicle control ECU
DIAGNOSTIC TROUBLE CODES (DTC) LIST

DTC Description
DTC P1520  Stop light switch circuit
DTC P1566  Input Signal Circuit abnormal
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