Geely Emgrand X7. Manual part — 53

4

Read the front oxygen sensor data stream.

(a) Start

the

vehicle.

(b) Warm up the engine with normal idle speed.

(c) Read the front oxygen sensor data stream with a fault diagnosis tester.

Front oxygen sensor standard value: 0.2-0.8 V

Is front oxygen sensor data normal?

Step 5

Observe the long-term fuel adjustment parameters.

(a) Start

the

vehicle.

(b) Warm up the engine.

(c) Observe the long-term fuel adjustment parameter with a fault diagnosis tester.

Is the long-term fuel adjustment parameter normal?

Step 6

Inspect engine system and its components.

(a) Turn the ignition switch to OFF position.

(b) Inspect the vacuum hose crack, kink or connections.

(c) Inspect the intake manifold, throttle body and fuel injector vacuum leakage.

(d) Inspect the crankshaft ventilation system leakage.

(e) Inspect Fuel Contamination.

(f) Inspect the working station of fuel system when the air-fuel ratio is too lean.

(g) Inspect injector nozzle spray fuel too thin.

(h) Inspect the fuel system working at Air-Fuel ratio too thick.

(i) Inspect injector spray fuel too thick.

(j) Inspect intake manifold collapse or obstruction.

(k) Inspect whether there is excessive fuel in the crankcase.

(l) Inspect evaporative emission control systems working condition.

(m) Inspect working condition of other fault lamps in the instrument.

Is engine System normal?

Yes

The system is normal.

No

Yes

The system is normal.

No

No

Refer to 2.12.7.22 DTC P0131 P0132 P0133
P0134.

Yes

211

Step 7

Repair engine system and its components.

Step 8

The system is normal.

5. Maintenance

guide

:

Refer to 2.2.8.5 “Replacement of Fuel Injectors” to replace the fuel injectors

Refer to “2.4.6.3 Replacement of Canister Solenoid Valve” to replace the canister solenoid valve.

Next

212

2.2.7.27 DTC P0222 P0223

1. DTC

description:

DTC P0222 Electronic Throttle Position Sensor #2 Circuit Low Voltage

DTC P0223 Electronic Throttle Position Sensor #2 Circuit High Voltage

TPS2 sensor sends signal through ECT harness connector EM28 terminal C to ECM through ECM
harness connector EM01 terminal No.27. If the TPS2 sensor signal is lost, but ECM is able to
receive the normal TPS1 sensor signal, then ECM controls the engine to enter reliability of
determining the driver's intention decline or no high power output mode. Engine's responding to
the pedal changes becomes slow and engine power output will be significantly weaker, although
the vehicle can still be able to drive in normal traffic.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection
Strategy

Conditions For Setting The DTC
(Control Strategy)

Fault Locations

P0222

Hardware
Circuit
Malfunction

TPS signal end short to ground or
open, the input signal is less than
3.5%, DTC code set.

P0223

Hardware
Circuit
Malfunction

TPS signal end short to power supply,
input signal is greater than 96.5%,
DTC code set.

1. Electronic

Throttle Body

2. Electronic

Throttle Circuit

3. ECM

3. Circuit

sketch

Refer to 2.2.7.21 DTC P0122 P0123

4. Diagnostic

Steps:

Note: Before carrying out this diagnosis step, observe the data list on fault diagnosis tester and
analyze the accuracy of the data, as these will help with quick diagnosis.

Step 1

Inspect for DTC codes P0641, P0651, P0122, P0123.

(a) Connect fault diagnosis tester to the vehicle diagnostic interface.

(b) Turn ignition switch to ON position.

(c) Press the fault diagnosis tester power button.

(d) Select the following menu items: Engine/Read DTC codes.

(e) Read DTC codes.

Results

DTC Codes Shown

To Step

Only P0222 and P0223

Yes

Oil P0222, P0223, P0641 and P0651

No

213

Step 2

Inspect EM28 terminal C.

(a) Rotated ignition switch to OFF

position .

(b)

Disconnect ETC harness
connector EM28.

(c)

Disconnect ECM harness
connector EM01.

(d) Measure resistance between

EM28 terminal C and a reliable
ground.

(e) Measure voltage between EM28

terminal C and a reliable ground.

(f) Test continuity between EM28

terminal C and EM01 terminal
No.27.

电子节气门线束连接器 EM28

A

E

B

F

C

G

D

H

NL02-0029c

Results

Test Items

Standard Value

Resistance Between EM28 (C) and A Reliable Ground

10 kΩ or higher

Voltage Between EM28 (C) and a Reliable Ground

0V

EM28 (C) and EM01 (27) Continuity

Less than 1 Ω

Does it conform to the standard value?

Step 3

Inspect terminal C voltage output signal.

(a) Connect

ETC

harness connector EM28.

(b) Connect ECM harness connector EM01.

(c) Measure ETC harness connector EM28 terminal C output voltage.

Standard Value: Refer to 2.2.7.12 Electronic Throttle Body (ETC) Inspection.

Is the output voltage value accorded with the standard value?

No

Circuit malfunction, repair circuit.

Yes

No

Circuit malfunction, repair circuit.

Yes

No

Refer to2. 12.7.46 DTC P0641 P0651

Yes

Electric throttle harness connectorEM28

214