Suzuki Wagon R Manual page 2107

6-2-104 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
DTC P0037 HO2S Heater Control Circuit Low (Sensor-2)
DTC P0038 HO2S Heater Control Circuit High (Sensor-2)
Wiring Diagram
BLU/BLK
3
WHT/BLU
1
80A 60A
E23
7 6 5 4
17 16 15 14 13 12
27 26 25 24 23 22
34 33 32
1. Relay box
2. Shield wire
3. Ignition switch
DTC Detecting Condition and Trouble Area
DTC Detecting Condition
Current of HO2S–2 heater is more than specified value
or less than specified value for 5 seconds continuously
(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.
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up to normal operating temperature.
4) Run engine at idle speed for 1 min.
5) Check DTC and pending DTC.
4
BLK/WHT
5
BLK/WHT
8
E22
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 COIL" fuse
6. HO2S–2
6
BLK/WHT
7
2
BRN/WHT
E21
2 1 6 5 4 3
11 10 9 8 16 15 14 13 12 11 10 9
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–1 heater
9. ECM
• HO2S–2 heater
• HO2S–2 heater circuit
• ECM
9
BLK/WHT E21-28
E23-3
BLU/RED
BLU E22-33
BRN/WHT E22-28
10
2 1
7
8
19 18 17
30 29 28
10. To other sensor
Trouble Area