ON-BOARD DIAGNOSTIC [CRUISE CONTROL SYSTEM]
T–179
T
FOREWORD
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Outline
• There are two on-board diagnostic functions: Operation mode, which inspects for and indicates correct
operation of the input signals to the control module, and condition detection mode, which indicates troubles in
the system.
• The two functions can be done using either of the following methods:
— Verifying the flashing pattern of the cruise set indicator light in the instrument cluster.
Inspection Order
End Of Sie
INSPECTION OF DTCS FOR OPERATION MODE
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Note
• The cruise set indicator light will illuminate for 3 seconds‚ when operation mode is on.
• If the cruise set indicator light does not illuminate for 3 seconds (Operation mode is not on)‚ the following
may be the cause of the malfunction:
— Cruise actuator ignition power supply fuse
— Cruise set indicator light power supply fuse
— Cruise control switch
— Cruise control main switch
— Clock spring for air bag system
— Print plate in instrument cluster
— Cruise set indicator light bulb
— Cruise actuator
— Open or short circuit in following wiring harnesses:
• Between cruise set indicator light and cruise actuator terminal G
• Between fuse block and cruise actuator terminal L
• Between fuse block and instrument cluster
• Between cruise actuator and clock spring
• Between clock spring and cruise control switch
— Open circuit in following wiring harnesses:
• Between cruise actuator terminal I and ground
• Between clock spring and ground
1. Turn the ignition switch to the ON position.
2. Verify that the cruise control main switch is off.
ON-BOARD DIAGNOSTIC [CRUISE CONTROL SYSTEM]
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