Subaru 2009 IMPREZA Service Manual page 1470

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CH:DTC P0851 PARK/NEUTRAL SWITCH INPUT CIRCUIT LOW (AT MODEL)
DTC DETECTING CONDITION:
• Detected when two consecutive driving cycles with fault occur.
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-165, DTC P0851 PARK/NEUTRAL SWITCH INPUT
CIRCUIT LOW (AT MODEL), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
Improper idling
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-54,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PROCE-
DURE, Inspection Mode.>.
WIRING DIAGRAM:
B136 ECM
INHIBITOR SWITCH
P R
12 6
11 9
B12 T3 T7
STARTER MOTOR
M
B14
EN(H4DOTC)(diag)-249
N D
ENGINE (DIAGNOSTICS)
T7
1 2 3 4 5
6 7 8 9
B12
1 2 3 4
5 6 7 8
9 10 11 12
B136
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 27
28 29 30 31 32 33 34 35
EN-07198