Chery Tiggo. Manual — part 279

Diagnostic Procedure

1.

CHECK A/T OUTPUT SIGNAL

• With the scan tool, select view DTC and data stream for A/T.

• Vehicle start and read out the value of ⬙OUTPUT SPEED SENSOR⬙.

ITEM

CONDITION

DISPLAY

VALUE

Output speed

sensor

During driving

Approximately

matches the

speedometer

reading.

Is the check result normal?

Yes

>>

The condition that caused this DTC is intermittent (See Diagnostic Help in Section 08 Transaxle &

Transfer Case).

No

>>

Go to the next step.

2.

CHECK OUTPUT SHAFT SPEED SENSOR POWER SUPPLY

• Stop vehicle and turn ignition switch off.

• Disconnect output shaft speed sensor connector.

• Turn ignition switch on.
• Check sensor power supply between sensor termi-

nal 3 and ground in the sensor electrical connector
E-089.

• Voltage should be more than 12 V.

Is the check result normal?

Yes

>>

Go to step 4.

No

>>

Go to the next step.

DIAGNOSIS & TESTING

LTSMD080006

3.

DETECT MALFUNCTIONING PART

• Check the following:

− Harness connectors A-102, E-105
− Body fuse and relay box H13
− Fuse 3 (10A)
− Harness for an open or short between output shaft speed sensor and fuse

Is the check result normal?

Yes

>>

Go to the next step.

No

>>

Repair or replace the open circuit or short to ground or short to power in harness or connectors.

4.

CHECK OUTPUT SHAFT SPEED SENSOR SIGNAL CIRCUIT

• Check sensor signal circuit between sensor terminal 2 and ground in the sensor electrical connector E-088.

• 5 V should exist.

Is the check result normal?

Yes

>>

Go to the next step.

No

>>

Repair or replace the open circuit or short

to power or short to ground.

5.

CHECK OUTPUT SHAFT SPEED SENSOR GROUND CIRCUIT

• Turn ignition switch off.

• Disconnect TCM connector.

• Check for harness continuity between the following terminals:

OUTPUT

SPEED

SENSOR

CONNECTOR

TERMINAL

TCM

CONNECTOR

TERMINAL

CONTINUITY

1

39

Yes

• Check the harness for short to power and short to ground.

Is the check result normal?

Yes

>>

Go to the next step.

No

>>

Repair or replace circuit for an open or short to power or short to ground.

DIAGNOSIS & TESTING

LTSMD080061

08

6.

CHECK OUTPUT SHAFT SPEED SENSOR SIGNAL

• Connect TCM and sensor connector.

• Start the vehicle and perform the following:

− Engine: 2000 RPM
− Vehicle: 50 km/h
− Gear: 3

• Check sensor signal between sensor terminal 2 and ground in the sensor electrical connector E-089 with X-431

or oscilloscope.

• Make sure the wave shape is normal and signal voltage is fluctuating from 0-5 V.

Is the check result normal?

Yes

>>

Go to step 9.

No

>>

Go to the next step.

7.

CHECK OUTPUT SHAFT SPEED SENSOR

• Perform the following:

− Loose the bolt of the sensor.
− Remove the sensor.
− Visually inspect the sensor for missing or chipped teeth.

TERMINAL NO.

RESISTANCE

⍀ (25°C)

1 - 2

Except 0 or

⬁

1 - 3

2 - 3

Is the check result normal?

Yes

>>

Replace the output speed sensor with a known good one.
Monitor the output speed sensor signal on the X-431 or oscilloscope.
− If the output speed sensor signals were normal, the system is OK.
− If the output speed sensor signals were still irregular or missing, go to step 8.

No

>>

Replace output speed sensor.

8.

CHECK TRANSFER CASE DRIVEN GEAR AND DRIVE GEAR

• Disassemble and repair the A/T and replace or repair the transfer case driven gear and drive gear.

• Check for a chipped and damaged signal gear of the transfer case driven and drive gear.

Is the check result normal?

Yes

>>

Go to the next step.

No

>>

Replace or repair the transfer case driven gear and drive gear.
Monitor the output speed sensor signal on the X-431 or oscilloscope.
If the signal pulse is not normal, repair the noise interference.

DIAGNOSIS & TESTING

9.

CHECK DTC

• With the X-431 scan tool, read TCM DTCs.

• Refer to ⬙DTC Confirmation Procedure⬙.

Is DTC 23 still present?

Yes

>>

Replace the TCM.

No

>>

The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.

DIAGNOSIS & TESTING

08