Chery Tiggo 5 (T21). Service 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
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