Page text (OCR transcript)
BE–177
BODY ELECTRICAL SYSTEM – CRUISE CONTROL SYSTEM
DTC 21 23 Speed Sensor Circuit
CIRCUIT DESCRIPTION
Transmission
Output Shaft
Rotor Shaft
SR3327
No. 1 Vehicle Speed Sensor
The speed sensor signal is sent to cruise control ECU as vehicle speed signal.
The rotor shaft is driven by the gear of the transmission. For each rotation of the shaft, the speed sensor sends a 4–pulse signal to the combination meter.
This signal is converted inside the combination meter and sent as a 4–pulse signal to the cruise control ECU.
The ECU calculates the vehicle speed from this pulse frequency.
4 pulse/
1 rotation
of rotor shaft
4 pulse/
1 rotation
of rotor shaft
Speed Sensor
ECT
OD/TRIP METER
(in Telltale Light RH)
Cruise Control ECU
NO9508
Code No. Diagnosis Trouble area
21 Speed signal is not input to the ECU while cruise control is set..
• Speed sensor
• Combination meter
• Harness or connector between speed sensor and combination meter, combination meter and ECU.
• ECU
23 Vehicle speed decrease 16 km/h or more than preset speed.
Vehicle speed sensor pulse is abnormal.
• Actuator
• Speed sensor
• Harness or connector in OD and SPD circuit (Open or short intermittently)
• ECU
