Diagnosis; Cruise Control Diagnosis - Daewoo Nubira User Manual

9U – 6ICRUISE CONRTOL SYSTEM

CRUISE CONTROL DIAGNOSIS

Test Description
The number(s) below refer to step(s) on the diagnostic
table.
Step
1 Visually inspect the cruise control system and verify
the following conditions:
S The electrical connector is correctly attached to
the cruise control actuator.
S The actuator and the bracket are not loose.
S The cable is not bent or kinked.
S The cable adjuster is correctly attached to its
bracket.
S The cable and bushing are correctly attached
to the accelerator assembly.
S The cable is properly adjusted.
Are all of the above conditions verified?
2 Make repairs to the components of the cruise control
system that were observed to be faulty in Step 1.
Is the repair complete?
3
1. Connect a scan tool to the data link connector
(DLC).
2. Check for engine control diagnostic trouble
codes (DTCs).
Is a vehicle speed sensor (VSS)DTCorDTC722 or
DTC723 present?
4 Diagnose and repair the cause of theDTCs.
Is the cruise control still inoperative?
5 Observe the brake lamps when the brakes are ap-
plied.
Do the brake lamps turn on when the brakes are ap-
plied and turn off when the brakes are not applied?
6 Repair the brake lamp system.
Does the cruise control operate after the brake lamp
system has been repaired?
7 Check fuses F5 andF8.
Is a fuse blown?
8
1. Check for a short circuit and repair it, if neces-
sary.
2. Replace any blown fuses.
Is the repair complete?
9
1. Turn the ignition ON.
2. Check the voltage at fuses F5 and F8.
Is the specified voltage available at fuses F5 andF8?
10 Repair the power supply to the fuse(s).
Is the repair complete?

DIAGNOSIS

Cruise Control Does Not Operate
Action
5. This test is performed because the electromagnetic
clutch in the cruise control actuator is grounded
through the brake lamps.
Value(s)
Go to Step 3
System OK
Go to Step 5
Go to Step 5
Go to Step 7
System OK
Go to Step 9
System OK
11–14 v Go to Step 11
System OK
Yes No
Go to Step 2
Go to Step 4
System OK
Go to Step 6
Go to Step 7
Go to Step 8
Go to Step 10
DAEWOO V–121 BL4