Engine General Information and Diagnosis: 1A-72
DTC P0101: Mass Air Flow Circuit Range / Performance
S5JB0A1104017
Wiring Diagram
10
HO2S heater control circuit check
1) Disconnect connector from ECM with ignition switch
turned OFF.
2) Check for proper connection of HO2S-2 heater circuit
terminal to ECM connector.
3) If connection are OK, measure wire resistance of sensor
heater control circuit at ECM connector between ECM to
HO2S-2.
Is measured wire resistance lower than 1
Ω
?
Go to Step 11.
Repair or replace
defective wire circuit.
11
HO2S-2 heater circuit check
1) Measure insulation resistance between control terminal
of HO2S-2 heater at ECM connector and vehicle body
ground.
Is measured resistance infinity?
Substitute a known
good ECM and recheck.
Repair or replace short
wire.
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
BLU/BLK
BLU/BLK
WHT/GRN
BLK/RED
BLK/RED
BLK/RED
BLK/YEL
BLU
12V
5V
5V
2
3
4
E23-29
E23-1
E23-60
BLU/BLK
E23-16
LT GRN
GRY/GRN
GRY/GRN
1
BLU/BLK
C37-25
C37-57
5
BLU
RED
C37-26
C37-27
C37-15
C37-29
C37-48
BLK/ORN
C37-58
C37-30 BLK/ORN
BLK/YEL
BLK/YEL
BLK/YEL
I5JB0A110033-01
1. MAF and IAT sensor
3. Main relay
5. To other sensors
2. Ignition switch
4. ECM
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