Subaru IMPREZA 2004 Service Manual page 37

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
O: DTC P0121 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT
RANGE/PERFORMANCE
• DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• TROUBLE SYMPTOM:
• Erroneous idling
• Engine stalls.
• Poor driving performance
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO)(diag)-47,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)(diag)-40, OPERATION,
Inspection Mode.>.
• WIRING DIAGRAM:
THROTTLE
POSITION
SENSOR
E13
E2
B21
B83
ECM
B135
EN(H4SO)(diag)-114
*
1
LHD : 3
*
RHD : 2
E13
1 2 3 4
B21
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
17 18 19 20
B83
: LHD
1 2 3
4 5 6
B83
: RHD
1 2 3 4
B135
4 5 6 7
1 2 3
8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28
EN-01427