Speed Sensor Circuit - Toyota Camry Manual

BE–198
DTC 21 23 Speed Sensor Circuit
CIRCUIT DESCRIPTION
CIRCUIT DESCRIPTION
The speed sensor signal is sent to cruise control ECU as vehicle speed sig-
nal.
Code No.
Speed signal is not input to the ECU
Actual vehicle speed has dropped by 16 km/h
(10 mph) or more below the set speed during
cruising.
HINT: When speed sensor circuit is opened
intermittently (Below 0.2 sec), code 23
is output.
DIAGNOSTIC CHART
Input signal check.
Check speedometer circuit.(See
combination meter troubleshooting on
page BE–63).
Check harness and connector for loose
connection. If connection is normal,
check and replace cruise control ECU.
BODY ELECTRICAL SYSTEM
Diagnosis
– CRUISE CONTROL SYSTEM
Trouble area
Speed sensor
Combination meter
Harness or connector between speed sensor
and combination meter, combination meter
and ECU.
ECU
Actuator
Actuator control cable
Speed sensor
Harness or connector in OD and SPD circuit
(Open or short intermittently)
ECU
Proceed to next circuit
inspection shown on matrix
chart (See page BE–178).
Repair or replace speed
sensor, harness, connector or
combination meter assembly.