Suzuki GRAND VITARA User Manual

1A-111 Engine General Information and Diagnosis:
DTC P0171 / P0172 / P2195 / P2196: Fuel System Too Lean / Rich / Stuck Lean / Stuck Rich
S5JB0A1104037
Wiring Diagram
A/F Sensor Description
Refer to “A/F Sensor Description: ”.
4 HO2S-2 signal circuit check
1) Turn ON ignition switch.
2) Measure voltage between “RED” wire terminal of HO2S-
2 connector and vehicle body ground.
Is voltage 0 V?
Go to Step 5. “RED” wire is shorted to
other circuit.
5 HO2S-2 heater circuit check
1) Check HO2S-2 heater circuit referring to “DTC P0037 /
P0038: HO2S Heater Control Circuit Low / High
(Sensor-2): ”.
Is circuit in good condition?
Go to Step 6. Repair HO2S-2 circuit. If
circuit is OK, substitute
a known-good ECM and
recheck.
6 HO2S-2 check
1) Check HO2S-2 referring to “Heated Oxygen Sensor
(HO2S-2) Heater On-Vehicle Inspection: in Section 1C”.
Is it in good condition?
Substitute a known-
good ECM and recheck.
Replace HO2S-2.
Step Action Yes No
E23 C37
34
1819
5671011
1720
47 46495051
2122
52
1625
9
24
14
29
5557 54 53
59
60 58
2
262728
15
30
56 48
32 31343536374042 39 38
44
45 43 41 33
11213
23
834
1819
5671011
1720
47 46495051
2122
52
1625
9
24
14
29
5557 54 53
59
60 58
2
262728
15
30
56 48
32 31343536374042 39 38
44
45 43 41 33
11213
23
8
4
3
9
PNK
6
2
1
8
5
BLK/WHT
BLK
PNK*GRN
C37-34
C37-32
C37-37
C37-38
BLK
BLK
BLU
WHT
C37-35
C37-31
WHT
BLK
RED/YEL
RED/BLU
PNK/BLU
BLK/YEL
10
7
11
5 V
5 V
I5JB0A110044-02
1. HO2S heater relay 4. “O2 HTR” fuse 7. Heater 10. Adjusting resistor
2. Shield wire 5. “IG COIL” fuse 8. To HO2S-2 heater 11. Sensor
3. Ignition switch 6. A/F sensor 9. ECM *: For M16 engine

Suzuki GRAND VITARA Specifications

General

Brand	Suzuki
Model	GRAND VITARA
Category	Automobile
Language	English