Suzuki WagonR+ RB310, Service Manual

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ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-91
DTC P0131 O2 Sensor (HO2S) Circuit Low Voltage (Sensor-1)
DTC P0132 O2 Sensor (HO2S) Circuit High Voltage (Sensor-1)
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1. Relay box 4. Circuit fuse box 7. Heater 10. To other sensor
2. Shield wire 5. “ IG COIL ” fuse 8. To HO2S – 2 heater
3. Ignition switch 6. HO2S – 1 9. ECM
E23 E22 E21
1 2 3 4 5 6 7 1 2 3 4 5 6 1 2 3 4 5 6 7
7
8 9 10 11 12 13 14 15 16 17 8 9 10 11 12 13 14 15 16 8 9 10 11 12 13 14 15 16 17
18 19
18 19
17 18 19 20 21 22 23 24 25 26 27 20 21 22 23 20 21 22 23 24 25 24 25 26 27 26 27
28 29 30 31 32 32 28 29 30 28 29 30 31 31 33 33 32 33 34 34 35 34 35
BLK/WHT BLK/WHT
WHT/BLU
80A
60A
BLU/BLK
YEL
RED
BRN/WHT BRN/WHT
BLK/WHT
BLK/WHT
E21-28
E23-4
E22-11
E22-28
9
6
2
7
5
4
1
3
8
10
DTC Detecting Condition Trouble Area
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, monitoring once/1 driving)
• HO2S – 1 sensor circuit
• HO2S – 1 sensor
• Fuel system
• ECM
• Fuel shortage
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.