Chery QQ6 Manuale di Servizio

Service Manual for Chery QQ6 (UMC EFI for 473F Engine) After Sales Service Department of Chery Automobile Sales Co., Ltd.

3. Phase Sensor 3.1 Function of the sensor: Provide ECU with phase signal, i.e. help crankshaft position sensor of engine to judge it is then at compr

4.3 Parameters of technical features (1) Data limit Item Value Unit Rated voltage Can only be run by ECU Rated resistance at 20℃ 2.5

5. Knock Sensor 5.1 Function of the sensor: The knock sensor provides ECU with knock signal. When the engine generates knock, ECU will control to grad

The electronic throttle body can automatically open or close the throttle according to the driver’s will to apply the accelerator pedal to let the eng

signals fed back by the oxygen sensor, i.e. control injection pulse-width to let the mixed gas always maintain an approximately ideal air-fuel ratio (

(close to 100mV). The signal voltage will mutate near theoretical equivalent air-fuel ratio (λ=1), see the figure above. Every oxygen sensor

8. Fuel Pump Assembly 8.1 Function of fuel pump: Fuel pump is used to deliver the fuel in the fuel tank to inside the engine at a certain pressure for

wrapping material with care only when installing. The viser can be taken off only when the fuel pump is to be installed. Takeoff of the filter net at

9.3 Parameters of technical features Value Item Min. Typical Max. Unit Oper

surface of the O-ring at the upside of the injector where it connects with the fuel distributing pipe. Be careful not to let engine oil contaminate in

CONTENTS CHAPTER ONE DISASSEMBLY AND INSTALLATION OF ELECTRONIC FUEL INJECTION SYSTEM...

casing. When one of the primary windings grounding channel is connected, the primary winding is in charging. Once the primary winding circuit is cut o

11. Spark Plug The operating conditions of spark plug is extremely inclement, it is exposed to high pressure, high temperature and impact as well as s

scratch is present on the cylinder wall. Pearl overheating check if the spark plug type matches, and then replace with the spark plug with l

pressure difference between the inlet and the outlet of the canister control valve. The canister control valve will be closed when there is not any el

l Simple measurement method: With the joint removed, turn the digital multimeter to Ohm shift, and then connect the two meter pens respectively to b

gases as carbon dioxide and water etc. At 300-800, the conversion efficiency of three℃ -way catalytic converter is maximum; with a temperature below t

1. High speed fan control (corresponds to ECU50#); 2. Low speed fan control (corresponds to ECU68#); The operating mode of fan after engine stops: 1

Clutch position switch provides ECU with the signal of clutch position, but this signal can only be used to distinguish between disengaging and engagi

Chapter Two Fundamental Principle for Failure Diagnosis of Electronic Fuel Injection System 1. Failure Information Records The ECU monitors sensor, a

information record will be stored in memory after the identified failure disappears (after troubleshooting). When a failure is identified for the

11.4 Front Oxygen Sensor Failure...38 11.5 Rear Oxygen Sensor Failu

Figure 3-1 ISO 9141-2 Standard Diagnostic Connector 8. Clearing Failure Information Records After the failure is removed, the failure information rec

4 P0032 Too high voltage in heating control circuit of upstream oxygen sensor class31 5 P0105 Signal failure of intake air pressure sensor class

41 P0340 Failure in signal circuit of phase sensor class5 42 P0341 Improper signal from phase sensor class5 43 P0342 Too low voltage in signal

77 P0694 Too high voltage in relay control circuit of electronic cooling fan (high speed) class5 78 P0704 Improper clutch pedal signal class5 79

106 P2191 Self-study value of closed loop air fuel ratio control is above the upper limit (heavy load zone) class5 107 P2192 Self-study value of cl

11. The Steps for Implementation of Failure Diagnosis According to Failure Information Records 11.1 Electronic Throttle Failure Failure codes: P012, P

11.2 Knock Sensor failure Failure codes: P0324, P0327, P0328 No. Operating steps Result Follow up steps 1 Close the ignition switch, and the engi

11.3 Air Pressure Sensor Failure Failure codes: P0102, P0103, P0112, P0113 No. Operating steps Result Follow up steps 1 Put the ignition switch t

11.4 Front Oxygen Sensor Failure Failure codes: P0130, P0131, P0132, P0134, P0135 No. Operating steps Result Follow up steps 1 Put the ignition s

Yes Check other part 12 Connect special diagnostic tester for Chery to read part of data stream of the engine, and then carefully observe part of da

Chapter One Disassembly and Installation of Electronic Fuel Injection System I. Disassembly and Installation of Components of Electronic Fuel Injecti

11.5 Rear Oxygen Sensor Failure Failure codes: P0136, 0137, 0138, 0036, 0037, 0038, 0054 No. Operating steps Result Follow up steps 1 Put the ign

part of data stream of the engine, and then observe if part of data stream of the oxygen sensor is around 100 under standard idling operation. No Rep

11.6. Coolant Temperature Sensor Failure Failure codes: P0112, P0113 No. Operating steps Result Follow up step

11.7 Failure in Driver Stage of Injector Failure codes: P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271 No. Opera

11.8 Failure in Driver Stage of Canister Control Valve Failure codes: P0443, 0444, 0445 No. Operating steps Result Follow up steps 1 Start the en

11.9 Failure in Driver Stage of Malfunction Indicator Lamp (MIL) Failure codes: P1677, P1678, P1679 No. Operating steps Result Follow up steps 1

11.10 Failure in Driver Stage of 1#, 2# Coils of Step Motor Failure codes: P1682, 1683 No. Operating steps Result Follow up steps 1 Turn on the i

11.11 Crankshaft Position Sensor Failure Failure code: P0016 No. Operating steps Result Follow up steps 1 Put t

11.12 Craftshaft Position Sensor Failure Failure codes: P0321, P0322, P0219 No. Operating steps Result Follo

11.12 Ignition Coil Failure No. Operating steps Result Follow up steps 1 Put the ignition switch to “ON”. Next step Yes Next step 2 Pull out

5. Remove the four fixing bolts of electronic throttle body. Pull out the connector and take out the electronic throttle body. 6. Use a scre

11.13 Accelerator Pedal Position Sensor Failure Failure codes: P2106, P2122, P2123, P2127, P2128, P2138 No. Operating steps Result Follow up steps

11.14 Double Brake Switch Failure codes: P0571, P0504 No. Operating steps Result Follow up steps 1 Put the ignition switch to “ON”. Next step

11.15 Theft-proof Control System Failure No. Operating steps Result Follow up steps 1 Insert the ignition key in

12. Steps for Implementation of Failure Diagnosis by Engine Symptom 12.1 Perform Preliminary Inspection First before Following the Steps for Implemen

Check that grounding of wire harness is clean and firm. Check that vacuum pipeline is unbroken, twisted and in right connection. Check that ther

12.2 The Engine Does not Rotate or Rotates Slowly when Starting No. Operating steps Result Follow up steps Yes Next step 1 Use a multimeter to

12.3 When Starting, Engine Can be Dragged to Rotate but Can not Start with Success. No. Operating steps Result Follow up steps Yes Remove the fai

work correctly. No Replace the fuel injector Yes Replace fuel 12 Check if fuel is bad or moisture. No 18 Yes Next step 13 Check if the fuel pre

12.4 Warm Starting Difficulty No. Operating steps Result Follow up steps Yes Remove the failure displayed 1 Put the ignition switch to “ON”.

Yes Replace fuel pump 12 Check if the fuel pump is stopped up. No Replace ECU Note: Warm starting difficulty is in connection with many systems,

Chapter Two Principle of Electronic Fuel Injection System I. Overhaul of System Components 1. Intake Air Temperature Pressure Sensor 1.1 Function of

12.5 Engine Speed is Normal, but it is Difficult to Start at any Time No. Operating steps Result Follow up steps Yes Remove the failure displayed

No Replace fuel pressure regulator Yes Next step 14 When engine coolant is at low temperature, pull out electronic throttle body on harness and obs

12.6 Cold Starting Difficulty No. Operating steps Result Follow up steps Yes Remove the failure displayed 1 Put the ignition switch to “ON”.

No 17 Yes Next step 12 Check if the fuel pressure value is below 300 kPa. No 16 Yes Next step 13 Close the fuel manometer valve. Re-engage the

12.7 Unsteady Idle Speed at Any Time Yes Remove the failure displayed 1 Put the ignition switch to “ON”. Use a failure diagnostic tester to check

Yes Next step 13 Check if the fuel pressure value is below 300kPa. No 17 Yes Next step 14 Close the fuel manometer valve. Re-engage the ignition

12.8 Unsteady Idle Speed during Warming up Process Yes Remove the failure displayed 1 Put the ignition switch to “ON”. Use a failure diagnostic te

12.9. Unsteady Idle Speed after Warming up Yes Remove the failure displayed 1 Put the ignition switch to “ON”. Use a failure diagnostic tester to

Yes Repair or replace oil intake pipe 12 Check if there is leaking or jam in oil intake pipe. No Replace oil pump Yes Repair or replace oil return

12.10 Unsteady Idle Speed or Extinguish with Load (A/C etc.) Yes Remove the failure displayed 1 Put the ignition switch to “ON”. Use a failure dia

1.3 Parameters of technical features This sensor is designed to be mounted on the plane of auto engine intake manifold. The pressure connecting pipe

12.11 Periodic Unsteadiness (Have to Perform Self-study again after ECU is Power off) Yes Remove the failure displayed 1 Put the ignition switch to

Yes Replace ECU 12 Check if the spark plug is in right conditions. No Replace spark plug Note: For periodic unsteadiness, mainly check air intak

12.12 Too High Idle Speed (Have to Perform Self-study again after ECU is Power off) Yes Remove the failure displayed 1 Put the ignition switch to

12.13. Engine Revolution Speed is too Low or Flameout Yes Remove the failure displayed 1 Put the ignition switch to “ON”. Use a failure diagnostic

not return. Check if the oil pressure occurs immediately. No Repair and replace fuel injector and oil pipe Yes Repair or replace oil intake pipe 13

12.14 Slow Response when Accelerating Yes Remove the failure displayed 1 Put the ignition switch to “ON”. Use a failure diagnostic tester to check

Yes Replace the pressure regulator 13 Open the valve of fuel gauge and clamp the oil return pipe by oil return baffle so that the oil can not return

12.15 Poor Performance and Disability when Accelerating. Yes Repair 1 Check if failure occurs, such as clutch slipping, low tire pressure, brake de

Yes Next step 12 Close the fuel manometer valve. Re-engage the ignition switch to let the fuel pump run for a period of time, and then check if fuel

12.16 Unable to Reach the Maximum Revolution when Accelerating Yes Remove the failure displayed 1 Put the ignition switch to “ON”. Use a failure d

2. Tachogenerator of Engine 2.1 Function of the sensor: As one of the uppermost sensors of engine, the tachogenerator of engine provides ECU with rev

catalytic converter are jammed. No Replace ECU Note: In case the engine is unable to reach its maximum revolution when accelerating, mainly check if

12.17 When Releasing Accelerator Pedal after Acceleration, Unsteady Idle Speed Occurs at Instant, even Extinguishes. Yes Remove the failure displaye

kPa. No 15 Yes Replace or clean 12 Check if the exhaust system and three-way catalytic converter are jammed. No Replace ECU Note: For an electr

12.18 A/C System Failure Yes Next step 1 Check if there is enough coolant, if the A/C belt, the A/C clutch and the pressure switch are in good cond

13. Safety Precautions for System Maintenance 13.1 Safety Precautions for Diagnosis and Maintenance of Gasoline Injection Electronic Control System

If disassembled parts can not be repaired or for other processing immediately, store them properly. The spare parts can be taken out of their pack

2.3 Parameters of technical features Value Item Min. Typical Max. Unit Resistance under a room temperature of 20°C 774 860 946 Ω Inductance 3