Chery Tiggo. Manual — part 173

P1545 - Throttle Position Control Performance

DIAGNOSIS & TESTING

LTSMW030025T

03

DIAGNOSIS & TESTING

LTSMW030026T

Check reference values between ECM terminals and ground under the following conditions:

ECM TERMINAL

NO.

ITEM

CONDITION

DATA (DC

VOLTAGE)

32

Regulated sensor

supply 2

Ignition switch: ON

-

-

Approximately 5 V

38

Electronic throttle

control actuator

(position sensor)

• Engine stopped

• Accelerator pedal:
Fully released

4.24 V

• Engine stopped

• Accelerator pedal:
Fully depressed

0.72 V

54

Electronic throttle

control actuator

• Engine stopped

• Accelerator pedal:
Fully released

0.74 V

• Engine stopped

• Accelerator pedal:
Fully depressed

4.62 V

64

Motor 4

-

12 or 0 V

65

Motor 3

66

Motor 2

12 or 0 V

67

Motor 1

78

Sensor (GND)

Approximately 0 V

On Board Diagnostic Logic
• Self-diagnosis detection logic.

DTC NO.

DTC DEFINITION

DTC DETECTION

CONDITION

DTC SET

CONDITION

POSSIBLE CAUSE

P1545

Throttle position

control performance

• Ignition switch:
ON

• Engine: Running

Rationally incorrect
voltage is sent to
ECM compared with
the signals from
TPS1 and TPS2.

• Electronic throttle
control actuator
(TPS1 and TPS2)

• Harness or
connectors

• Accelerator pedal
position sensor 2

• ECM

DTC Confirmation Procedure:

Before performing the following procedure, confirm that battery voltage is more than 12 V.

• Turn ignition switch off.

• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available.

• Turn ignition switch on.

• With the scan tool, record and erase stored DTCs in the ECM.

• Start engine and warm it to normal operating temperature, then select view DTC and data stream.

• If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1.

• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-

bleshooting in Section 03 Electronic Engine Controls for more information.

NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.

DIAGNOSIS & TESTING

03

Diagnostic Procedure

1.

CHECK GROUND CONNECTIONS

• Turn ignition switch off.

• Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con-

trols).

• Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine

Room Harness (With 2.0L Engine) in Section 16 Wiring).

Are the ground connections OK?

Yes

>>

Go to the next step.

No

>>

Repair or replace ground harness or connections.

2.

CHECK THE TPS ELECTRICAL CONNECTOR

• Disconnect the TPS electrical connector (1).

• Inspect the electrical connector for damage.

Is the electrical connector OK?

Yes

>>

Go to the next step.

No

>>

Repair or replace the electrical connector

as necessary.

DIAGNOSIS & TESTING

VISMD030203