1A-48 Engine General Information and Diagnosis:
DTC P0037 / P0038: HO2S Heater Control Circuit Low / High (Sensor-2)
S4RS0A1104031
Wiring Diagram
DTC Detecting Condition and Trouble Area
7
HO2S-1 heater check
1) Disconnect HO2S-1 connector with ignition switch
turned OFF.
2) Check HO2S-1 heater resistance referring to “Heated
Oxygen Sensor (HO2S-1 and HO2S-2) Heater On-
Vehicle Inspection: in Section 1C”.
Is resistance within specified value range?
Go to Step 8.
Replace HO2S-1.
8
HO2S-1 heater power circuit check
1) Connect connector to HO2S-1 with ignition switch turned
OFF.
2) Measure resistance between “E23-29” and “C37-46”
terminals of ECM connector.
It resistance below 12
:
?
HO2S-1 heater circuit is
OK.
Substitute a known-
good ECM and recheck.
“BLK/WHT”, “BLK/RED”
and / or “GLY” wire is
high resistance circuit.
Step
Action
Yes
No
E23
C37
3
4
18
19
5
6
7
10
11
17
20
47 46
49
50
51
21
22
52
16
25
9
24
14
29
55
57
54 53
59
60
58
2
26
27
28
15
30
56
48
32 31
34
35
36
37
40
42
39 38
44
45
43
41
33
1
12
13
23
8
3
4
18
19
5
6
7
10
11
17
20
47 46
49
50
51
21
22
52
16
25
9
24
14
29
55
57
54 53
59
60
58
2
26
27
28
15
30
56
48
32 31
34
35
36
37
40
42
39 38
44
45
43
41
33
1
12
13
23
8
BLK/WHT
WHT
80A
11
GRN
3
9
E23-29
BRN
YEL
BLK/WHT
GRY
C37-47
C37-11
C37-57
6
2
7
10
GRY
BLU
WHT
RED/BLU
1
4
5
8
5 V
12
I4RS0A110030-
1. Main fuse box
4. Junction block assembly
7. Heater
10. To other sensor
2. Shield wire
5. “IG COIL” fuse
8. To HO2S-1 heater
11. Relay box
3. Ignition switch
6. HO2S-2
9. ECM
12. “IG ACC” fuse
DTC detecting condition
Trouble area
Current of HO2S-2 heater is more than specified value or less than
specified value for 5 seconds continuously
(2 driving cycle detection logic)
• HO2S-2 heater
• HO2S-2 heater circuit
• ECM
Содержание SWIFT RS415 2017
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