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6-94 ENGINE GENERAL INFORMATION AND DIAGNOSIS
DTC P0131 O2 Sensor (HO2S) Circuit Low Voltage (Sensor-1)
DTC P0132 O2 Sensor (HO2S) Circuit High Voltage (Sensor-1)
WIRING DIAGRAM
BLK/YEL
3
WHT/BLU
1
60A
80A
C64
7
6
5
4
17
16
15
14
13
12
27
26
25
24
23
22
34
33
32
1. Relay/fuse box
2. Shield wire
3. Ignition switch
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
DTC P0131:
• HO2S voltage is higher than 4.5 V even after engine run-
ning for specified time continuously from engine start
• Maximum HO2S voltage is less than 0.6 V or minimum
HO2S voltage is less than 0.3 V (2 driving cycle detection
logic)
DTC P0132:
• HO2S voltage is less than 3.0 V even after engine running
for specified time continuously from engine start
• Maximum HO2S voltage is 0.74 V or more or minimum
HO2S voltage is 0.34 V or more (2 driving cycle detection
logic)
DTC CONFIRMATION PROCEDURE
WARNING:
• When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and very careful during testing to avoid occurrence of an accident.
• Road test should be carried out with 2 person, a driver and tester, on a level road.
4
BLK/WHT
5
BLK/WHT
8
C63
3
2
1
7
6
5
4
3
11
10
9
8
19
18
17
16
15
14
13
12
21
20
19
18
27
26
25
24
31
30
29
28
35
34
33
32
4. Circuit fuse box
5. "IG" fuse
6. HO2S–1
6
BLK/WHT
7
2
ORN
G91
2
1
6
5
4
3
11
10
9
8
16
15
14
13
12
11
10
23
22
21
20
27
26
25
24
23
22
21
20
31
30
29
28
35
34
33
32
31
7. Heater
8. To HO2S–2 heater
9. ECM
• HO2S–1 sensor circuit
• HO2S–1 sensor
• Fuel system
• ECM
• Fuel shortage
9
BLK/WHT
G91-28
BLK/WHT
C64-4
WHT
C63-11
ORN
C63-28
10
2
1
9
8
7
19
18
17
30
29
28
10. To other sensor
TROUBLE AREA
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