Geely Emgrand X7. Manual part — 68

(c) Clear DTC code.

(d) Start and run the engine at idle speed to warm up the engine for at least 5 min.

(e) Read control system DTC code again to confirm that the system has no DTC code exported.

8 Troubleshooting

5. Maintenance

guide

:

Refer to “2.4.8.1 Replacement of Canister Solenoid Valve” to replace the canister solenoid valve.

No

Refer to 2.2.7.3 Intermittent Fault
Inspection for intermittent fault.

Yes

271

2.2.7.40 DTC P0480 P0481

1. DTC

description:

DTC P0480

Low-Speed Fan Malfunction

DTC P0481

High-Speed Fan Malfunction

High or low speed cooling fan relay coil power is provided by ECM controlled main relay. ECM
controls the relay via ECM harness connector EM01 terminal No.65 and 17. Drive circuit is
equipped with a feedback circuit to ECM. Drive circuit is equipped with a feedback circuit to
ECM. ECM monitors the feedback voltage control circuit to determine whether the control circuit
is open, short to ground or short to voltage.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection
Strategy

Conditions For Setting The DTC
(Control Strategy)

Fault Locations

P0480

P0481

Hardware Circuit
Inspection

Fan 1 control circuit open or shot,
reported as DTC code.

1. Relay

Circuit

2. Relay

3. ECM.

4. Cooling

Fan

3. Circuit

figure

Refer to 2.2.6 Electrical Schematic Diagram

4. Diagnostic

Steps:

Refer to 2.8.7.2 Cooling Fan Circuit Diagnosis

5. Maintenance

guide

:

Replace the cooling fan. Refer to 2.8.8.3 Replacement of Cooling Fan.

272

2.2.7.41 DTC P0502

1. DTC

Description:

DTC P0502

No signal from vehicle speed sensor

The vehicle speed signal is used to monitor the vehicle speed. The vehicle speed signal is one of
the fuel control reference signals during an urgent deceleration. Input through the terminal 51 of
ECM harness connector EM21 and further transmit to the instrument at the same time. The vehicle
speed sensor signal is sent to the instrument panel used for the vehicle speed display.

2. Conditions For Setting DTC and The Fault Location:

DTC Code

DTC Detection
Strategy

Conditions For Setting The DTC
(Control Strategy)

Fault Locations

P0502

No signal from
vehicle speed
sensor

1. Under hot operating conditions,

driving the vehicle at Low-Speed
at 3rd gear, Disconnect the
vehicle speed sensor. and then
press the acceleration pedal hard
to accelerate to higher than 4,000
and immediately release the
pedal. Engine speed, vehicle
speed and MAP values begin to
decline. When entering the fault
setting window, DTC code will
be set.

2. Under hot operating conditions,

driving the vehicle at medium
speed at 4th gear, Disconnect the
vehicle speed sensor. and then
press the acceleration pedal to
accelerate the vehicle. Engine
speed, vehicle speed and MAP
values entering the fault setting
window, DTC code will be set.

1. Vehicle Speed

Sensor

2. Vehicle Speed

Sensor Circuit

3. ECM.

273

3. Circuit

sketch

1

3

2

EM01

51

IP02

8

IP02

12

车速传感器

VSS

发

动

机
控

制

模

块

组

合

仪
表

8V POWER

SPEED

IN

OUT

NL02-0058c

4. Diagnostic

Steps:

1

Road test the vehicle. Is the vehicle speed displayed on the instrument working
properly?

A If the instrument displays the vehicle speed as per normal, the vehicle speed sensor is

working correctly.

B. If the instrument displays the vehicle speed abnormally, the vehicle speed sensor or the

circuit may be faulty.

2

Inspect the vehicle speed sensor power supply circuit.

No

Go to step 4

Yes

Speed sensor

Combinat

ion

instrument

Engine contro

l

module

274