Chery Tiggo 5 (T21). Manual — part 59
06–
78
06
Diagnosis Procedure
a. Turn ignition switch to LOCK.
b. Check ECM grounds E-026 and E-028 (
a. Disconnect downstream oxygen sensor connector.
b. Check downstream oxygen sensor connector.
a. Connect downstream oxygen sensor connector E-043.
b. Turn ignition switch to ON, start the engine and idle it for
about 3 minutes.
c. Using diagnostic tester, measure downstream oxygen
sensor signal voltage, or using multimeter, measure
voltage between terminals 2 and 1 of connector E-043.
1
Check ECM ground point
Repair or replace ground wire harness or
ground point
NG
2
Check downstream oxygen sensor connector
OK
RT21060040
Repair or replace connector
NG
3
Check downstream oxygen sensor signal
OK
ISO15031_PID03a
Datastream name
Close loop,u
sing oxygen
sensor(s) as
feedback for
fuel control
Value
Unit
23.83
8
0.46
17.25
V
kg/h
%
%
relative air mass (calc.load value) acc. To SAE J1979
Air mass flow
output voltage oxygen sensor downstream catalyst
relative air charge
Datastream
RT21060140
Multimeter
Connection
Condition
Specified
Condition
E-043 (2) - E-043
(1)
Engine running
Fluctuates slightly
at about 0.45 V
Go to step 7
OK
NG
06–
79
06
a. Turn ignition switch to LOCK.
b. Disconnect ECM connector E-033.
c. Disconnect downstream oxygen sensor connector E-043.
d. Check wire harness between downstream oxygen sensor
connector terminals and ECM connector terminals.
Check for Open
Check for Short
a. Check wire harness between downstream oxygen sensor
connector terminals and ECM connector terminals.
Check for Open
4
Check downstream oxygen sensor signal circuit
E-033
E-043
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
1
2
3
4
-
+
RT21065029
Multimeter
Connection
Condition
Specified
Condition
E-043 (2) - E-033
(21)
Always
Continuity
Multimeter
Connection
Condition
Specified
Condition
E-043 (2) or
E-033 (21) - Body
ground
Always
No continuity
E-043 (2) or
E-033 (21) -
Battery positive
Replace wire harness or connector
(downstream oxygen sensor - ECM)
NG
5
Check downstream oxygen sensor ground circuit
OK
E-033
E-043
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
1
2
3
4
-
+
RT21065030
Multimeter
Connection
Condition
Specified
Condition
E-043 (1) - E-033
(43)
Always
Continuity
06–
80
06
Check for Short
a. Remove downstream oxygen sensor.
b. Check downstream oxygen sensor for following problems.
Moisture enters the internal of sensor, temperature changes greatly, and probe is broken.
Oxygen sensor is "poisoned" (Pb, S, Br, Si, etc.).
a. Use X-431 3G diagnostic tester to read the ECM DTC.
b. Refer to "DTC Confirmation Procedure".
c. Check if DTC P0136-00, P0137-00, P0138-00, P0140-00, P2270-00 or P2271-00 still exists.
Multimeter
Connection
Condition
Specified
Condition
E-043 (1) or
E-033 (43) - Body
ground
Always
No continuity
E-043 (1) or
E-033 (43) -
Battery positive
Repair or replace wire harness or
connector (downstream oxygen sensor -
ECM)
NG
6
Check downstream oxygen sensor
OK
Replace downstream oxygen sensor
NG
7
Check for DTCs
OK
Replace ECM
NG
System is operating normally.
Reassemble vehicle and perform a road test to confirm that malfunction reported by customer has
been repaired.
OK
06–
81
06
DTC
P0201-00 Cylinder 1 - Injector Circuit
ET21065007
BATTERY
ECM
MAIN
RELAY
10A
EF19
10A
EF17
10A
EF40
A2
F14
2-20
RL
A4
2-35
L
2-5
Br
A6
2-15
2-16
RR
R
86
87
85
30
ENGINE
COMPARTMENT
FUSE AND
RELAY BOX
IGNITION SWITCH
ON OR START
A1
A2
A3
A4
A5
A6
A7
A8 A9 A10
F12
F24
F11
F23
F10
F22
F9
F21
F8
F20
F7
F19
F6
F18
F5
F17
F4
F16
F3
F15
F2
F14
F1
F13
Gr
E-076
W
E-069
E-076
E-069
B
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
ECM-2
E-033
GW
RL
C3
15A
EF08
INJECTOR 1
1-4
2
1
GW
15
E-007
E-038
E-010
1
2
C1
C2
C3 C4
C5
C6
C7
C8 C9 C10
L
E-023
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
31
35
39
40
41
42
32
33
36
37
38 34
27
28
29
30
B
E-007
B
E-010
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-035
ECM-1
E-035
E-023
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