Suzuki Liana RH413, Service Manual

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Engine General Information and Diagnosis: 1A-60
1) Turn ignition switch OFF. Clear DTC with ignition
switch ON.
2) Warm up engine to normal operating temperature.
3) Drive vehicle at 50 – 60 km/h, 30 – 40 mph for 2 min.
4) Stop vehicle and run engine at idle for 2 min.
5) Check DTC and pending DTC.
DTC Troubleshooting
DTC P0135 (No. 14): Heated Oxygen Sensor (HO2S) Heater Circuit Malfunction (Sensor-1)
S3RH0A1104032
Wiring Diagram
DTC Detecting Condition and Possible Cause
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 Is there DTC(s) other than fuel system (DTC P0171 / P0172)
and HO2S-1 (DTC P0134)? Go to applicable DTC
diag. flow. Go to Step 3.
3 Check HO2S-1 and its circuit
1) Connect scan tool to DLC with ignition switch OFF.
2) Warm up engine to normal operating temperature and
keep it at 2000 r/min. for 60 sec.
3) Repeat racing engine (Repeat depressing accelerator
pedal 5 to 6 times continuously and take foot off from
pedal to enrich A/F mixture).
Does HO2S-1 output voltage deflect between 0.3 V and over
0.6 V repeatedly?
Go to “DTC P0171 /
P0172: Fuel System
Too Lean / Rich”. Check “WHT” and
“ORN” wires for open
and short, and
connections for poor
connection.
If wires and connections
are OK, replace HO2S-
1.
ECM
BLK/WHT BLK
BLK PNK/BLK
C41-7
IG1
C41 (31P) G04 (24P) G03 (17P)
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21
22 23 24 25 26 28 27 29 30 31
5 6 1 2 3 4 5 6 7
11 12 9 10 11 13 12 14 15 16
16 17
1 2
7 8
13 14
3 4
9 10
15 17 18
8
19 20 21 22 23 24
I3RH0A110016-01
DTC detecting condition Possible cause
DTC will set when one of the following conditions is met.
• Low voltage at terminal “C41-7” when engine is running at
high load.
• High voltage at terminal “C41-7” when engine is running
under condition other than above.
*2 driving cycle detection logic, Continuous monitoring
• HO2S-1 heater circuit open or shorted to ground
• ECM malfunction