Cruise Control Switch - Volvo 850 Accessories Manual

Cruise control system

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Table of Contents

1-1-1 (one press each time LED lights). Hold activation button down

about one second each time. Read response code.

Code 1-1-4 (Safety Disengagement)

Code 1-1-4 is set in event of a safety disengagement. Safety

disengagement does not necessarily mean something is wrong with

system. Cruise control system disengages automatically during abnormal

conditions such as wheel spin, climbing a steep hill, etc. If this

code is set without a normal safety disengagement, check speed signal

circuit. See CODE 1-1-2 & Code 1-2-2 under TEST FUNCTION NO. 1.

Code 1-4-1 (Neutral Start Switch Circuit Disengagement)

Code 1-4-1 is set if cruise control is disengaged when

transmission shift lever is set in Park or Neutral. If this code is

set without shift lever in one of these positions, control unit

terminal 3T was grounded at moment of disengagement. See NEUTRAL START

SWITCH CIRCUIT DISENGAGEMENT (RESPONSE CODE 2-2-3) under COMPONENT

TEST MODE.

Code 4-1-1 (Brake Selector Disengagement)

Code 4-1-1 is set if cruise control is disengaged by sliding

selector to OFF position or depressing brake or clutch pedal.

Otherwise, control unit terminal 9T did not have battery voltage at

moment of disengagement. This may be caused by play in selector, loose

wires and connectors, or incorrectly adjusted brake or clutch valve.

See BRAKE & CLUTCH PEDAL CHECK (RESPONSE CODE 1-1-3) under COMPONENT

TEST MODE.

Code 1-2-4 (Brakelight Circuit Disengagement)

Code 1-2-4 is set if cruise control is disengaged by

depressing brake pedal and closing brakelight switch. Otherwise,

control unit terminal 6S was not connected to ground through

brakelight bulbs at moment of disengagement. Check for loose wires or

connectors and an incorrectly adjusted brakelight switch. See

BRAKELIGHT SWITCH CHECK (RESPONSE CODE 1-3-2) under COMPONENT TEST

MODE.

Code 2-1-4 (Voltage Feed Not Connected/Disengagement)

1) Code 2-1-4 is set when ignition is turned on and remains

stored until cruise control is engaged using SET one time and

disengaged once. Reason for disengagement is then stored instead of

Code 2-1-4.

2) If Code 2-1-4 is set after disengagement during a test

drive, without engine having been turned off, voltage to control unit

has fallen below minimum level.

REMOVAL & INSTALLATION

BRAKE & CLUTCH VALVE

Removal & Installation

Brake valve is located at brake pedal. Remove clip, vacuum

hoses and connectors from valve. Use care not to damage rubber seals.

To install, reverse removal procedure. Adjust valve. See BRAKE &

CLUTCH VALVES under ADJUSTMENTS.