Diagnostic Trouble Code (Dtc); 4Ws Indicator; Temporary Driving Conditions; Fail-Safe Control - Honda Prelude 1993 Service Manual

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Table of Contents

Diagnostic Trouble Code (DTC):

The DTC is memo.ized when the 4WS control unit detects an abnormality, even if it was a temporary condition. To

troubleshoot, ask the customer in detail about the conditions when the 4WS indicator light came on, and try to duplicate

those conditions during the test drive. lt the 4WS indicator light does not come on during the test drive, do not continue

to troubleshoot; the system is OK at this time, The troubleshooting procedures assume that the symptom is occuning.

Check for loose connections or poor contacts at the connectors by wiggling the harness. etc.

The 4WS indicator light comes on when the 4WS control unit detects a problem in the system. Depending on the problem,

the 4WS indicator light may be canceled by turning the ignition switch ofl, or it might require removing the CLOCK, RA-

DIO (10 A) tuse in the under-hood fuse/relay box. It a problem is detected in the main steering angle sensor system,

you must remove the CLOCK, RADIO {1 O A) fuse to cancel the 4WS indicator light. lI a problem is detected in any other

part of the system, turning the ignition switch off will cancei the 4WS indicator light.

NOTE: It the 4WS light comes on because of a temporary problem in the main steering angle sensor system, it cannot

be canceled by simply removing the cause of the problem and cycling the ignition switch; the CLOCK, RADIO (10 A)

fuse must be removed.

The 4WS indicator light does not come on when the DTC is 71 , 72, ot 73. However. the 4WS indicator light will flash

these codes when the service check connector is iumoed.

Temporary Driving conditions:

When the vehicle is operated under extremely harsh or abnormal conditions, the 4WS control unit interprets it as a problem

and memorizes the DTC.

Fail-safe control:

When the fail-safe conditions are met, the 4WS control unit stops the 4WS control and returns the rear wheels to the

straight driving position slowly.

4WS Indicaror Light

The ignition is turned from OFF to ON while driving.

The car is driven aggressively with the driver and three passengers on

board. or the steering wheel is turned with a rear wheel blocked by

the curb, etc.

The engine is started while quick-charging the battery.

Driving the car with the parking brake ON.

ON 5 minutes

after detection

Troubleshooting