Chery QQ6 (S21) / S12LHD. Manual - part 98
11.4 Front Oxygen Sensor Failure ......................................................................................38
11.5 Rear Oxygen Sensor Failure .......................................................................................40
11.6. Coolant Temperature Sensor Failure .........................................................................42
11.7 Failure in Driver Stage of Injector ..............................................................................43
11.8 Failure in Driver Stage of Canister Control Valve......................................................44
11.9 Failure in Driver Stage of Malfunction Indicator Lamp (MIL) ..................................45
11.10 Failure in Driver Stage of 1#, 2# Coils of Step Motor ..............................................46
11.11 Craftshaft Position Sensor Failure ............................................................................47
11.12 Craftshaft Position Sensor Failure ............................................................................48
11.12 Ignition Coil Failure..................................................................................................49
11.13 Accelerator Pedal Position Sensor Failure................................................................50
11.14 Double Brake Swtich ................................................................................................51
11.15 Theft-proof Control System Failure..........................................................................52
12. Steps for Implementation of Failure Diagnosis by Engine Symptom...................................53
12.1 Perform Preliminary Inspection First before Following the Steps for Implementation
of Failure Diagnosis by Engine Symptom. .........................................................................53
12.2 The Engine Does not Rotate or Rotates Slowly when Starting...................................55
12.3 When Starting, Engine Can be Dragged to Rotate but Can not Start with Success. ...56
12.4 Warm Starting Difficulty ............................................................................................58
12.5 Engine Speed is Normal, but it is Difficult to Start at any Time. ...............................60
12.6 Cold Starting Difficulty ..............................................................................................62
12.7 Unsteady Idle Speed at Any Time ..............................................................................64
12.8 Unsteady Idle Speed during Warming up Process ......................................................66
12.9. Unsteady Idle Speed after Warming up .....................................................................67
12.10 Unsteady Idle Speed or Extinguish with Load (A/C etc.).........................................69
12.11 Periodic Unsteadiness (Have to Perform Self-study again after ECU is Power off) 70
12.12 Too High Idle Speed (Have to Perform Self-study again after ECU is Power off) ..72
12.13. Engine Revolution Speed is too Low or Flameout ..................................................73
12.14 Slow Response when Accelerating ...........................................................................75
12.15 Poor Performance and Disability when Accelerating. ..............................................77
12.16 Unable to Reach the Maximum Revolution when Accelerating...............................79
12.17 When Releasing Accelerator Pedal after Acceleration, Unsteady Idle Speed Occurs
at Instant, even Extinguishes...............................................................................................81
12.18 A/C System Failure...................................................................................................83
13. Safety Precautions for System Maintenance.........................................................................84
13.1 Safety Precautions for Diagnosis and Maintenance of Gasoline Injection Electronic
Control System ...................................................................................................................84