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DTC P0120 (No. 13): Throttle Position Circuit Malfunction
Wiring Diagram
DTC Detecting Condition and Possible Cause
DTC detecting condition
• Signal voltage high
or
• Signal voltage low
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
Step
1
Was "Engine and Emission Control System Check"
performed?
C41 (31P)
9
8
7
6
5
4
3
2
1
21
20
19
18
17
16
15
14
13
12
11
10
31
30
29
28 27
26
25
24
23
22
1. To MAP sensor and CO adjust resistor (if equipped)
2. From other sensors
Action
Engine General Information and Diagnosis:
1
GRY/RED
GRY/BLU
ORN
2
G04 (24P)
7
6
5
4
3
2
1
6
16
15
14
13 12
11
10
9
8
12
24
23
22
21
20
19
18
17
17
• "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
Go to Step 2.
ECM
5V
5V
C41-22
C41-16
C41-10
G03 (17P)
5
4
3
2
1
11
10
9
8
7
16
15
14
13
Possible cause
Yes
Go to "Engine and
Emission Control
System Check".
1A-52
S3RH0B1104019
I2RH0B110026-01
No
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