Chery Tiggo 5 (T21). Manual — part 216

18–

53

18

DTC Confirmation Procedure:

Confirm that battery voltage is between 11 and 14 V before performing the following procedures.
 Turn ignition switch to LOCK.
 Connect X-431 3G diagnostic tester (the latest software) to Data Link Connector (DLC), and make it

communicate with vehicle electronic module by the data network.

 Turn ignition switch to ON.
 Using X-431 3G diagnostic tester to record and clear the DTCs stored in the TCU.
 Turn ignition switch to LOCK and wait for a few seconds.
 Turn ignition switch to ON, and then select "Read Code".
 If DTC is detected, the malfunction indicated by the DTC is current. Go to the diagnosis procedure - Step 1.
 If DTC is not detected, the malfunction indicated by the DTC is intermittent. Please refer to Intermittent

DTC Troubleshooting.

Diagnosis Procedure

HINT:
After the fault is eliminated, verify DTC and symptom again.

a. Turn ignition switch to LOCK.
b. Disconnect the secondary speed sensor connector.
c. Check if the secondary speed sensor connector is dirty, oxidized, loose or damaged.

DTC Code

DTC Definition

DTC Detection

Condition

DTC Set

Condition

Possible Cause

P0720

Output Speed Sensor
Circuit

Start engine and keep
it at following status for
at least 1 min: throttle
opening not less than
10%, at D gear, engine
speed higher than 800
rpm

Output speed
signal is higher
than the
allowable value
within a period

 Incorrect

installation of the
output speed
sensor

 Signal circuit open

or short circuit

 Output speed

sensor power
circuit poor contact

 Output speed

sensor failure

 TCU signal circuit

failure

P1745

Second Speed Sensor
Plausible

Start engine and keep
it at following status for
at least 30 seconds:
throttle opening higher
than 10%, at D gear,
vehicle speed higher
than 10 km/h

Difference
between output
speed after
conversing
vehicle speed
signal and actual
measured speed
is higher than
limit

1

Check wire harness connector

Repair fault

NG

OK

18–

54

18

a. Turn ignition switch to LOCK and disconnect the negative

battery cable.

b. Disconnect the wire harness connectors E-030 and E-079.
c. Check for continuity between the terminals 19, 50 and 54

of wire harness connector E-030 and terminals 3, 2 and 1
of connector E-079.

a. Turn ignition switch to LOCK and disconnect the negative

battery cable.

b. Disconnect the wire harness connector E-030.
c. Check for continuity between the terminals 19, 50 and 54

of wire harness connector E-030 and ground.

2

Check TCU wire harness

-

+

RT21180950

E-030

29 30 31 32 33 34 35 36 37 38 39 40 41 42

1 2 3 4 5 6 7 8 9 10 11 12 13 14

43 44 45 46 47 48 49 50 51 52 53 54 55 56

15 16 17 18 19 20 21 22 23 24 25 26 27 28

E-079

1

2

3

Repair or replace failed circuit

NG

OK

3

Check if TCU wire harness connector E-030 and ground is conductive

-

+

RT21180960

E-030

29 30 31 32 33 34 35 36 37 38 39 40 41 42

1 2 3 4 5 6 7 8 9 10 11 12 13 14

43 44 45 46 47 48 49 50 51 52 53 54 55 56

15 16 17 18 19 20 21 22 23 24 25 26 27 28

Repair or replace failed circuit

NG

OK

18–

55

18

a. Turn ignition switch to LOCK and disconnect the negative

battery cable.

b. Disconnect the wire harness connector E-030.
c. Check if the terminals 19, 50 and 54 of wire harness

connector E-030 are short to power.

a. Correctly install a new secondary shaft speed sensor.
b. Using the X-431 3G diagnostic tester, check whether the system is normal.

a. Using X-431 3G diagnostic tester, select Read Code.
b. Check if DTC P0720 or P1745 still exists.

4

Check if TCU wire harness connector E-030 is short to power

RT21180970

E-030

29 30 31 32 33 34 35 36 37 38 39 40 41 42

1 2 3 4 5 6 7 8 9 10 11 12 13 14

43 44 45 46 47 48 49 50 51 52 53 54 55 56

15 16 17 18 19 20 21 22 23 24 25 26 27 28

-

+

V

Repair or replace failed circuit

NG

5

Check secondary shaft speed sensor

OK

Diagnosis complete

NG

6

Check for DTC

OK

Replace TCU

NG

System is normal

OK

18–

56

18

DTC Confirmation Procedure:

Confirm that battery voltage is between 11 and 14 V before performing the following procedures.
 Turn ignition switch to LOCK.
 Connect X-431 3G diagnostic tester (the latest software) to Data Link Connector (DLC), and make it

communicate with vehicle electronic module by the data network.

 Turn ignition switch to ON.
 Using X-431 3G diagnostic tester to record and clear the DTCs stored in the TCU.
 Turn ignition switch to LOCK and wait for a few seconds.
 Turn ignition switch to ON, and then select "Read Code".
 If DTC is detected, the malfunction indicated by the DTC is current. Go to the diagnosis procedure - Step 1.
 If DTC is not detected, the malfunction indicated by the DTC is intermittent. Please refer to Intermittent

DTC Troubleshooting.

Diagnosis Procedure

HINT:
After the fault is eliminated, verify DTC and symptom again.

a. Engine wire harness (check for looseness, dirt and other fault)
b. Transmission sensor (check for damage, dirt and other fault)
c. Are all checks OK?

a. Use diagnostic tester to check the transmission system.
b. Is there any DTC except for P0730?

DTC

P0730

Incorrect Gear Ratio

DTC Code

DTC Definition

DTC Detection

Condition

DTC Set

Condition

Possible Cause

P0730

Incorrect Gear Ratio

Start engine and keep
it at following status for
at least 1 min: throttle
opening not less than
15%, at D gear, vehicle
speed not less than 18
km/h

The absolute
value of
difference of
target speed
ratio and actual
speed ratio is
higher than the
standard value

 Speed ratio control

valve body circuit
seized

 Solenoid wire

harness or
connector open
circuit or short
circuit

 Auxiliary oil

pressure control
failure or too low

1

Carry out following preliminary checks

Repair fault

NG

2

Check transmission system

OK