Chery Tiggo 5 (T21). Manual — part 82
06–
170
06
DTC Confirmation Procedure
Confirm that battery voltage is over 12 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).
Turn ignition switch to ON.
Use X-431 3G diagnostic tester to record and clear the DTCs stored in the ECM.
Select Read Code.
If the 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 (
).
Diagnosis Procedure
a. Turn ignition switch to LOCK.
b. Check ECM grounds E-026 and E-028 (
a. Disconnect ECM connector E-033.
b. Disconnect TCU connector E-030.
c. Check if connectors are normal.
DTC Code
DTC Definition
DTC Detection
Condition
Possible Cause
U0101-87
Lost Communication
With TCM (CVT only)
Ignition switch ON
Engine running
CAN line or connector
ECM
TCM
CAUTION
When performing circuit diagnosis and test, always refer to the circuit diagram for specific circuit and
component information.
1
Check ECM ground point
Repair or replace ground wire harness or
ground point
NG
2
Check ECM connector and TCM connector
OK
Repair or replace connector
NG
OK
06–
171
06
a. Check CAN line.
Check for Open
Check for Short
a. Use X-431 3G diagnostic tester to read the ECM DTC.
b. Refer to "DTC Confirmation Procedure".
c. Check if DTC U0101-87 still exists.
3
Check CAN line
E-033
49 50 51
63
64
15
16
31
32
47
48
33 34 35
17 18 19
1 2 3
52 53 54 55 56 57 58 59 60 61 62
36 37 38 39 40 41 42 43 44 45 46
20 21 22 23 24 25 26 27 28 29 30
4 5 6 7 8 9 10 11 12 13 14
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
-
+
RT21065063
Multimeter Connection
Specified
Condition
E-033 (1) - E-030 (41)
Continuity
E-033 (17) - E-030 (42)
Continuity
Multimeter Connection
Specified
Condition
E-033 (1) or E-030 (41) - Body ground
No continuity
E-033 (1) or E-030 (41) - Battery
positive
No continuity
E-033 (17) or E-030 (42) - Body
ground
No continuity
E-033 (17) or E-030 (42)- Battery
positive
No continuity
Repair or replace CAN line
NG
4
Replace ECM, and check for DTCs
OK
Replace TCU
NG
System is operating normally.
Reassemble vehicle and perform a road test to confirm that malfunction reported by customer has
been repaired.
OK
06–
172
06
DTC
U0129-87 Lost Communication With BSM
ET21065020
2-1
2-17
26
CAN H1
CAN L1
CAN H1
CAN L1
14
OB
O
OB
O
ECM-2
ECM-1
E-033
E-035
2-63
2-64
1-47
Br
Br
B
B
Br
B
1-48
E-026
E-028
37 38 39 40 41 42 43 44 45 46
47
48
25 26 27 28 29 30 31 32 33 34
35
36
13 14 15 16 17 18 19 20 21 22
23
24
1
2
3
4
5
6
7
8
9 10
11
12
B
E-033
B
E-035
49 50 51
63
64
15
16
31
32
47
48
33 34 35
17 18 19
1
2
3
52 53 54 55 56 57 58 59 60 61 62
36 37 38 39 40 41 42 43 44 45 46
20 21 22 23 24 25 26 27 28 29 30
4
5
6
7
8
9 10 11 12 13 14
ABS
CONTROL
MODULE
13
12 11 10 9 8 7 6 5 4 3 2
24 23 22 21 20 19 18 17 16 15 14
37 36 35 34 33 32 31 30 29 28 27 26
1
38
25
B
E-085
E-085
06–
173
06
DTC Confirmation Procedure
Confirm that battery voltage is over 12 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).
Turn ignition switch to ON.
Use X-431 3G diagnostic tester to record and clear the DTCs stored in the ECM.
Start the engine and warm it up to normal operating temperature, and then select Read Code.
If the 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 (
).
Diagnosis Procedure
a. Turn ignition switch to LOCK.
b. Check ECM grounds E-026 and E-028 (
a. Disconnect ECM connector E-033.
b. Disconnect ABS connector E-085.
c. Check if connectors are normal.
DTC Code
DTC Definition
DTC Detection
Condition
Possible Cause
U0129-87
Lost Communication
With BSM
Ignition switch ON
Engine running
CAN line or connector
ECM
ABS
CAUTION
When performing circuit diagnosis and test, always refer to the circuit diagram for specific circuit and
component information.
1
Check ECM ground point
Repair or replace ground wire harness or
ground point
NG
2
Check ECM connector and ABS connector
OK
Repair or replace connector
NG
OK
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