Chery Tiggo 5 (T21). Service manual — part 334

31–

40

31

a. Reconnect all disconnected connectors securely.
b. Connect the negative battery cable.
c. Turn ignition switch ON.
d. Use X-431 3G diagnostic tester (the latest software) to record and clear DTCs stored in the HVAC control

panel assembly.

e. Turn ignition switch to LOCK and wait for a few seconds.
f. Turn ignition switch ON.
g. Use X-431 3G diagnostic tester to read DTCs stored in the HVAC control panel assembly again.

5

Reconfirm DTCs

Replace HVAC control panel assembly

NG

System operates normally

OK

31–

41

31

DTC

B2135

AC Heater Core Sensor Short to Ground Or Open Circuit

ET21310120

HVAC
CONTROL
PANEL

K-012

BATTERY

RF10

7.5A

RF21

10A

IGNITION SWITCH
ON OR START

10

21

1

2

3

4

5

6

7

8

9 10 11 12

13

85

85

87

87 30

87 30

30

86

86

85

86

14 15 16 17 18 19 20 21 22 23 24

25

27

26

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

W

K-012

22 21 20

18

19

17 16 15

13

14

12 11 10

8

9

7

6

5

3

4

2

1

B

I-039

B

I-007

2

WB

BR

4

21

WV

19

Y

INSTRUMENT
PANEL FUSE
AND RELAY
BOX

I-007

I-039

K-007

4

B

BrW

8

I-039

K-007

I-037

W

K-007

1

2

3

4

5

6

8

9

10 11

13 14

15 16

18

17

21

20

22

7

12

19

2

1

W

K-002

B

33

22

2

1

B

HEATER CORE
SENSOR

K-002

31–

42

31

Diagnosis Procedure

Use the circuit diagram as a guide to perform the following procedures:
a. Turn ignition switch to LOCK.
b. Disconnect the negative battery cable.
c. Disconnect the HVAC control panel assembly connector K-012 and heater core sensor connector K-002.
d. Check if wire harnesses are worn, pierced, pinched or partially broken.
e. Look for broken, bent, protruded or corroded terminals.
f. Check if related connector pins are in good condition.

a. Remove the heater core sensor.
b. Install the new heater core sensor to vehicle.
c. Use X-431 3G diagnostic tester to check if DTCs are still output.

DTC Code

DTC Definition

DTC Detection

Condition

Possible Cause

B2135

AC Heater Core
Sensor Short to
Ground Or Open
Circuit

Ignition switch ON

 Heater core sensor
 Wire harness and connector
 HVAC control panel

CAUTION

 When performing electrical equipment diagnosis and test, always refer to the circuit diagram for related

circuit and component information.

1

Check wire harness and connector

Repair or replace A/C wire harness and
connector

2

Check heater core sensor

Replace heater core sensor

NG

OK

NO

YES

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43

31

a. Turn ignition switch to LOCK.
b. Disconnect the negative battery cable.
c. Disconnect the HVAC control panel assembly connector

K-012 and heater core sensor connector K-002.

d. Using a digital multimeter, check for continuity between

terminals of connector K-012 and connector K-002 to
check if there is an open in system according to the table
below.
Standard Condition

a. Turn ignition switch to LOCK.
b. Disconnect the negative battery cable.
c. Disconnect the HVAC control panel assembly connector

K-012.

d. Using a digital multimeter, check for continuity between

connector K-012 and body ground to check if system is
short to ground according to the table below.
Standard Condition

3

Check wire harness and connector (HVAC control panel assembly - heater core sensor)

RT21311140

-

+

K-012

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

K-002

2

1

Multimeter

Connection

Condition

Specified

Condition

K-012 (22) -

K-002 (2)

Always

Continuity

K-012 (33) -

K-002 (1)

Always

Continuity

Repair or replace A/C wire harness and
connector

NG

4

Check wire harness and connector (HVAC control panel assembly - body ground)

OK

RT21311150

-

+

K-012

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Multimeter

Connection

Condition

Specified

Condition

K-012 (22) - Body

ground

Always

No continuity

K-012 (33) - Body

ground

Always

No continuity

Repair or replace A/C wire harness and
connector

NG

OK