Toyota T100 1996 Service Manual page 683

PROBLEM SYMPTOMS TABLE
SET not occourring or CANCEL occurring.
(DTC is Normal)
SET not occurring or CANCEL occurring.
(DTC is not output)
Actual vehicle speed deviates above or below the set speed.
Gear shifting frequent between 3rd and O/D when driving on uphill
road. (Hurting)
Cruise control not cancelled, even when brake pedal is de-
pressed.
Cruise control not cancelled, even when transmission is shifted to
"N" postion.
Control switch does not operate.
(SET/COAST, ACC/RES, CANCEL not possible)
SET possible at 40 km/h (25 mph) or less, or CANCEL does not
operate at 40 km/h (25 mph) or less.
Poor response in ACCEL and RESUME modes.
O/D does not resume, even though the road is not uphill.
DTC memory is erased.
DTC is not output, or is output when it should not be.
Cruise MAIN indicator light remains ON or fails to light up.
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
Symptom
− CRUISE CONTROL SYSTEM
Suspect Area
1. Main Switch Circuit
(Cruise control switch)
2. Vehicle Speed Sensor
3. Control Switch Circuit
(Cruise control switch)
4. Stop Light Switch Circuit
5. Park/Neutral Position Switch Circuit
6. Actuator Motor Circuit
7. Cruise Control Cable
8. Cruise Control ECU
1. ECU Power Source Circuit
2. Cruise Control ECU
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
1. Electronically Controlled Transmission
Communication Circuit
2. Cruise Control ECU
1. Cruise Control Cable
2. Stop Light Switch Circuit
3. Actuator Motor Circuit
4. Cruise Control ECU
1. Cruise Control Cable
2. Park/Neutral Position Switch Circuit
3. Actuator Motor Circuit
4. Cruise Control ECU
1. Cruise Control Cable
2. Control Switch Circuit
3. Actuator Motor Circuit
4. Cruise Control ECU
1. Cruise Control Cable
2. Vehicle Speed Signal Abnormal
3. Actuator Motor Circuit
4. Cruise Control ECU
1. Cruise Control Cable
2. Electronically Controlled Transmission
Communication Circuit
3. Actuator Motor Circuit
4. Cruise Control ECU
1. Electronically Controlled Transmission
Communication Circuit
2. Cruise Control ECU
1. Back−up Power Source Circuit
2. Cruise Control ECU
1. Tc Circuit
2. Cruise Control ECU
1. Cruise MAIN Indicator Light Switch Circuit
DI−419
DI34Z−02
See page
DI−454
DI−428
DI−431
DI−434
DI−443
DI−420
DI−458
IN−26
DI−449
IN−26
DI−458
DI−428
DI−440
DI−420
DI−437
IN−26
DI−440
IN−26
DI−458
DI−434
DI−420
IN−26
DI−458
DI−443
DI−420
IN−26
DI−458
DI−431
DI−420
IN−26
DI−458
DI−428
DI−420
IN−26
DI−458
DI−440
DI−420
IN−26
DI−440
IN−26
DI−452
IN−26
DI−456
IN−26
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