Chery Tiggo 5 (T21). Manual - part 225

18–

89

18

DTC

P0938

Hydraulic Oil Temperature Sensor Range

DTC

P0939

Hydraulic Oil Temperature Sensor Circuit Low

DTC

P0940

Hydraulic Oil Temperature Sensor Circuit High

ET21180170

TCU

47

20

GR

V

1

2

OIL

 TEMP

OIL

 TEMP

 GND

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

CONNECTOR B

B

E-030

E-052

E-030

6

5

4

3

2

1

7

8

9

10

Gr

E-052

18–

90

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 transmission wire harness connector.
c. Check if the transmission wire harness connector is dirty, oxidized, loose or damaged.

DTC Code

DTC Definition

DTC Detection 

Condition

DTC Set 

Condition

Possible Cause

P0938

Hydraulic Oil 
Temperature Sensor 
Range

Start engine and wait 
for at least 3 seconds 

The CVT oil 
temperature 
sensor voltage is 
less than the 
high oil 
temperature 
Standard value

 CVT oil 

temperature 
sensor failure

 Signal circuit open 

or short circuit

 TCU signal circuit 

failure

P0939

Hydraulic Oil 
Temperature Sensor 
Circuit Low

The CVT oil 
temperature 
sensor voltage is 
less than the 
standard min 
value

P0940

Hydraulic Oil 
Temperature Sensor 
Circuit High

When the CVT 
oil temperature 
sensor voltage is 
higher than the 
standard max 
value

1

Check wire harness connector

Repair fault

NG

OK

18–

91

18

a. Turn ignition switch to LOCK and disconnect the negative 

battery cable.

b. Disconnect the wire harness connectors E-030 and E-052.
c. Check for continuity between terminals 20 and 47 of wire 

harness connector E-030 and terminals 2 and 1 of 
connector E-052.

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 terminals 20 and 47 of wire 

harness connector E-030 and ground.

2

Check engine compartment wire harness

-

+

RT21181200

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-052

6

5

4

3

2

1

7

8

9

10

Repair or replace failed circuit

NG

3

Check for continuity between transmission wire harness connector E-030 and ground

OK

-

+

RT21181210

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–

92

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 20 and 47 of wire harness 

connector E-030 are short to power.

a. Using X-431 3G diagnostic tester, select Read Code.
b. Check if DTC P0938, P0939 or P0940 still exists.

4

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

RT21181220

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 for DTC

OK

Replace wire harness assembly

NG

System is normal

OK