DI08L-12
DI-572
-
DIAGNOSTICS
CRUISE CONTROL SYSTEM
726
Author:
Date:
2001 SIENNA (RM787U)
PROBLEM SYMPTOMS TABLE
Symptom
Suspect Area
See page
SET not occurring or CANCEL occurring.
(DTC is Normal)
3. Vehicle Speed Sensor
4. Control Switch Circuit (Cruise control switch)
5. Stop Light Switch Circuit
6. Park/Neutral Position Switch Circuit
7. Actuator Motor Circuit
8. Cruise Control Cable
9. Cruise Control ECU
SET not occurring or CANCEL occurring.
(DTC dose not output)
1. ECU Power Source Circuit
2. Cruise Control ECU
Actual vehicle speed deviates above or below the set speed.
1. Cruise Control Cable
2. Vehicle Speed Signal Abnormal
3. Electronically Controlled Transmission Communication
Circuit
4. Actuator Motor Circuit
5. Idle Signal Circuit (Main throttle position sensor)
6. Cruise Control ECU
Gear shifting frequent between 3rd O/D when driving on uphill
road. (Hurting)
1. Electronically Controlled Transmission Communication
Circuit
2. Cruise Control ECU
Cruise control not cancelled, even when brake pedal is de-
pressed.
1. Cruise Control Cable
2. Stop Light Switch Circuit
3. Actuator Motor Circuit
4. Cruise Control ECU
Cruise control not cancelled, even when transmission is shifted to
”N” position.
1. Cruise Control Cable
2. Park/Neutral Position Switch Circuit
3. Actuator Motor Circuit
4. Cruise Control ECU
Cruise control not cancelled, even when clutch pedal is de-
pressed.
1. Cruise Control Cable
2. Actuator Motor Circuit
3. Cruise Control ECU
Control switch does not operate.
(SET/COAST, ACC/RES, CANCEL not possible)
1. Cruise Control Cable
2. Control Switch Circuit
3. Actuator Motor Circuit
4. Cruise 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. Cruise Control Cable
2. Vehicle Speed Signal Abnormal
3. Actuator Motor Circuit
4. Cruise Control ECU
Poor response in ACCEL and RESUME modes.
1. Cruise Control Cable
2. Electronically Controlled Transmission Communication
Circuit
3. Actuator Motor Circuit
4. Cruise Control ECU
O/D does not RESUME, even though the road is not uphill.
1. Electronically Controlled Transmission Communication
Circuit
2. Cruise Control ECU
DTC memory is erased.
1. Cruise Control ECU
DTC is not output, or is output when should not be.
1. Diagnosis Circuit
2. Cruise Control ECU
Cruise MAIN indicator light remains ON or falls to light up.
1. Cruise MAIN Indicator Light Switch Circuit
Содержание RM787U
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