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5
Check downstream oxygen sensor heater control circuit
a. Disconnect ECM connector E-033.
b. Check wire harness between downstream oxygen sensor
connector terminals and ECM connector terminals.
Check for Open
Multimeter
Condition
Connection
E-043 (3) - E-033
(48)
Check for Short
Multimeter
Condition
Connection
E-043 (3) or
E-033 (48) - Body
ground
E-043 (3) or
E-033 (48) -
Battery positive
Repair or replace wire harness or
NG
connector (downstream oxygen sensor -
ECM)
6
Check downstream oxygen sensor heater
a. Measure resistance of downstream oxygen sensor.
Multimeter
Condition
Connection
Terminal C -
Terminal D
Terminal A -
Terminal B
Terminal A -
Terminal C
Terminal A -
Terminal D
Terminal B -
Terminal C
Terminal B -
Terminal D
Replace downstream oxygen sensor
NG
Chery Automobile Co., Ltd.
Specified
Condition
Always
Continuity
Specified
Condition
Always
No continuity
Always
No continuity
Specified
Condition
20°C
7 - 11 Ω
Always
No continuity
06 - SQR484F ENGINE MANAGEMENT SYSTEM
1
2
3
+
-
E-043
49 50 51
52 53 54 55 56 57 58 59 60 61 62
33 34 35
36 37 38 39 40 41 42 43 44 45 46
17 18 19
20 21 22 23 24 25 26 27 28 29 30
1 2 3
4 5 6 7 8 9 10 11 12 13 14
E-033
+
-
4
63
64
47
48
31
32
06
15
16
RT21065013
OK
D
C
B
A
RT21090140
43
06–
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Troubleshooting
