DI8ZE–03
Duty Ratio =
A + B
A
x 100 (%)
ON
OFF
A
B
1 cycle
I21975
C17
Cruise Control ECU
MC
MO
C3
Cruise Control Actuator
LG–B
1
2
15
MO
MC
R–W
7
Actuator
Motor
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM (w/o ETCS–i)
DI–731
993
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
CIRCUIT INSPECTION
DTC
11, 15
Actuator Motor Circuit
CIRCUIT DESCRIPTION
Actuator motor is operated by signals from the ECU. Acceleration and deceleration signals are transmitted
according to changes in the Duty Ratio (See below).
Duty Ratio:
The duty ratio is a ratio of a period of continuity in one cycle. For example, if A is a period of continuity in
one cycle, and B is a period of non–continuity.
DTC No.
DTC Detection Condition
Trouble Area
11
Short in actuator motor circuit
Actuator motor
Harness or connector between cruise control ECU and actua-
tor motor
Cruise control ECU
15
Open in actuator motor circuit
Actuator motor
WIRING DIAGRAM
I00004
I00151
2
1
DI–732
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM (w/o ETCS–i)
994
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
INSPECTION PROCEDURE
1
Check resistance between terminals 1 and 2 of actuator motor.
PREPARATION:
(a)
Turn the ignition switch OFF.
(b)
Disconnect the actuator connector.
CHECK:
Measure the resistance between terminals 1 and 2.
HINT:
If the control plate is in the fully opened or fully closed position,
the resistance can not be measured.
OK:
Resistance: More than 4.2 Ω
NG
Replace cruise control actuator.
OK
2
Check for open and short in harness and connector between cruise control ECU
and actuator motor (See page IN–28).
NG
Repair or replace harness or connector.
OK
Check and replace cruise control ECU.