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Cruise Control System Symptom Diagnosis
NOTE
• ECM uses TCM, ABS or ESP® control module and CAN communication to transmit and receive data
for cruise control. Therefore, check that no DTC is detected from ECM, TCM, ABS or ESP® control
module before performing this Cruise Control System Symptom Diagnosis. If DTC is detected,
correct trouble indicated by that DTC first.
• Check each part in the order from the top of the following list.
Condition
CRUISE or SET indicator
lamp does not turn ON or
OFF
Vehicle speed can not be
set
Acceleration or
deceleration is not
available by using RES/
ACC or SET/COAST
switch
Diagnostic Information and Procedures
Possible cause
MAIN (ON/OFF) switch faulty
SET/COAST switch faulty
Stop (brake) lamp switch faulty
Wiring or grounding faulty
Combination meter faulty
ECM faulty
MAIN (ON/OFF) switch faulty
SET/COAST switch faulty
Stop (brake) lamp switch faulty
CPP switch faulty (M/T model)
Wiring or grounding faulty
ECM faulty
RES/ACC or SET/COAST switch faulty Check RES/ACC or SET/COAST switch for
Wiring or grounding faulty
ECM faulty
Cruise Control System:
Correction / Reference Item
Check MAIN (ON/OFF) switch for function
referring to "Cruise Control Switch Inspection:
in related manual".
Check SET/COAST switch for function
referring to "Cruise Control Switch Inspection:
in related manual".
Check stop (brake) lamp switch for function
referring to "Stop (Brake) Lamp Switch
Inspection: in related manual".
Repair.
Replace.
Replace after making sure that none of above
parts is faulty.
Check MAIN (ON/OFF) switch for function
referring to "Cruise Control Switch Inspection:
in related manual".
Check SET/COAST switch for function
referring to "Cruise Control Switch Inspection:
in related manual".
Check stop (brake) lamp switch for function
referring to "Stop (Brake) Lamp Switch
Inspection: in related manual".
Check CPP switch for function referring to
"Clutch Pedal Position (CPP) Switch (for
Cruise Control) Inspection and Adjustment: in
related manual".
Repair.
Replace after making sure that none of above
parts is faulty.
function referring to "Cruise Control Switch
Inspection: in related manual".
Repair.
Replace after making sure that none of above
parts is faulty.
10A-5
S5JB0EA104001
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Troubleshooting
