Chery Tiggo 5 (T21). Service manual — part 330

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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 sun sensor connector I-021.
d. Disconnect the A/C wire harness connector K-007 and instrument panel wire harness connector I-039.
e. Check if wire harnesses are worn, pierced, pinched or partially broken.
f. Look for broken, bent, protruded or corroded terminals.
g. Check if related connector pins are in good condition.

a. Remove the sun sensor.
b. Install the new sun 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

B2133

AC Solar Sensor Short
to Ground or Open
Circuit (Left Side)

Ignition switch ON

 Sun sensor
 Wire harness and connector
 HVAC control panel

B2134

AC Solar Sensor Short
to Ground or Open
Circuit (Right Side)

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 related wire harness and
connector

NG

2

Check sun sensor

OK

Replace sun sensor

NO

YES

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

K-012 and sun sensor connector I-021.

d. Using a digital multimeter, check for continuity between

terminals of connector K-012 and connector I-021 to
check if there is an open in system according to the table
below.
Standard Condition

e. Disconnect the A/C wire harness connector K-007 and

instrument panel wire harness connector I-039.

f. Using a digital multimeter, check for continuity between

terminals of connector K-012 and connector K-007 to
check if there is an open in system according to the table
below.
Standard Condition

3

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

RT21311000

-

+

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

1

2

3

4

I-021

Multimeter

Connection

Condition

Specified

Condition

K-012 (36) -

I-021 (3)

Always

Continuity

K-012 (37) -

I-021 (1)

Always

Continuity

K-012 (30) -

I-021 (4)

Always

Continuity

RT21311010

-

+

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-007

1

2

3

4

5

6

8

9

10 11

13 14

15 16

18

17

21

20

22

7

12

19

Multimeter

Connection

Condition

Specified

Condition

K-012 (36) -

K-007 (5)

Always

Continuity

K-012 (37) -

K-007 (6)

Always

Continuity

K-012 (30) -

K-007 (16)

Always

Continuity

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g. Using a digital multimeter, check for continuity between

terminals of connector I-039 and connector I-021 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

RT21311020

-

+

1

2

3

4

I-021

22 21 20

18

19

17 16 15

13

14

12 11 10

8

9

7

6

5

3

4

2

1

I-039

Multimeter

Connection

Condition

Specified

Condition

I-039 (5) -

I-021 (3)

Always

Continuity

I-039 (6) -

I-021 (1)

Always

Continuity

I-039 (16) -

I-021 (4)

Always

Continuity

Repair or replace related wire harness and
connector

NG

4

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

OK

RT21311030

-

+

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 (36) - Body

ground

Always

No continuity

K-012 (37) - Body

ground

Always

No continuity

K-012 (30) - Body

ground

Always

No continuity

Repair or replace A/C wire harness and
connector

NG

OK

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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