Chery Tiggo 5 (T21). Manual — part 332
31–
32
31
DTC
B2126
AC Ambient Temperature Sensor Short to Ground or
Open Circuit
ET21310100
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
38
V
VW
22
1
2
YW
Y
YW
BlW
LW
15
14
1
2
3
4
5
6
7
8
9 10
11
12
13
14 15
W
B
E-027
E-047
1
2
E-027
I-034
I-039
K-007
3
9
OUTSIDE
TEMPERATURE
SENSOR
E-047
31–
33
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 A/C wire harness connector K-007.
d. Disconnect the instrument panel wire harness connectors I-039 and I-034.
e. Disconnect the engine compartment wire harness connector E-027 and outside temperature sensor
connector E-047.
f. Check if wire harnesses are worn, pierced, pinched or partially broken.
g. Look for broken, bent, protruded or corroded terminals.
h. Check if related connector pins are in good condition.
a. Remove the outside temperature sensor.
b. Install the new outside temperature 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
B2126
AC Ambient
Temperature Sensor
Short to Ground or
Open Circuit
Ignition switch ON
Outside temperature 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 related wire harness and
connector
NG
2
Check outside temperature sensor
OK
Replace outside temperature sensor
NO
YES
31–
34
31
a. Turn ignition switch to LOCK.
b. Disconnect the negative battery cable.
c. Disconnect the HVAC control panel assembly connector
K-012 and outside temperature sensor connector E-047.
d. Using a digital multimeter, check for continuity between
terminals of connector K-012 and connector E-047 to
check if there is an open in system according to the table
below.
Standard Condition
e. Disconnect the instrument panel wire harness connectors
I-039 and I-034.
f. Disconnect the engine compartment wire harness
connector E-027 and A/C wire harness connector K-007.
g. 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 - outside temperature
sensor)
RT21311070
-
+
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
E-047
1
2
Multimeter
Connection
Condition
Specified
Condition
K-012 (38) -
E-047 (1)
Always
Continuity
K-012 (22) -
E-047 (2)
Always
Continuity
RT21311080
-
+
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 (38) -
K-007 (3)
Always
Continuity
K-012 (22) -
K-007 (9)
Always
Continuity
31–
35
31
h. Using a digital multimeter, check for continuity between
terminals of connector I-039 and connector I-034 to
check if there is an open in system according to the table
below.
Standard Condition
i. Using a digital multimeter, check for continuity between
terminals of connector E-027 and connector E-047 to
check if there is an open in system according to the table
below.
Standard Condition
RT21311090
-
+
22 21 20
18
19
17 16 15
13
14
12 11 10
8
9
7
6
5
3
4
2
1
I-039
1
2
9
10
11
12
13
14
15
3
4
5
6
7
8
I-034
Multimeter
Connection
Condition
Specified
Condition
I-039 (3) - I-034
(15)
Always
Continuity
I-039 (9) - I-034
(14)
Always
Continuity
RT21311100
-
+
E-047
1
2
1
2
3
4
5
6
7
8
9 10
11
12
13
14 15
E-027
Multimeter
Connection
Condition
Specified
Condition
E-027 (15) -
E-047 (1)
Always
Continuity
E-027 (14) -
E-047 (2)
Always
Continuity
Repair or replace related wire harness and
connector
NG
OK
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