Suzuki Liana RH418, Supplementary Service Manual

Page: 65 / 371

Engine General Information and Diagnosis: 1A-52
DTC P0120 (No. 13): Throttle Position Circuit Malfunction
S3RH0B1104019
Wiring Diagram
DTC Detecting Condition and Possible Cause
NOTE
• When DTC P0105 (No. 11), P0110 (No. 18), P0115 (No. 19) and P0120 (No. 13) are indicated together, it
is possible that “ORN” or “GRY/RED” circuit be open.
• For A/T vehicle, TCM may detect P1700 at the same time, also clear DTC stored in TCM after
completion of repair.
• When this DTC and DTC P0105 (No. 11) are indicated together, it is possible that “GRY/RED” circuit
be open.
DTC Confirmation Procedure
1) Clear DTC, start engine and keep it at idle for 1 min.
2) Select “DTC” mode on scan tool and check DTC.
DTC Troubleshooting
C41-10
C41-22
C41-16
5V 5V
ECM
GRY/RED
GRY/BLU
ORN
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
1
2
I2RH0B110026-01
1. To MAP sensor and CO adjust resistor (if equipped)
2. From other sensors
DTC detecting condition Possible cause
• Signal voltage high
or
• Signal voltage low
• “ORN” circuit open
• “GRY/BLU” circuit open or shorted to ground
• “GRY/RED” circuit open or shorted to power or ground
• TP sensor malfunction
• ECM malfunction
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”.