Subaru 2009 IMPREZA Service Manual page 1498

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CV:DTC P1602 CONTROL MODULE PROGRAMMING ERROR
DTC DETECTING CONDITION:
• Detected when two consecutive driving cycles with fault occur.
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-187, DTC P1602 CONTROL MODULE PROGRAM-
MING ERROR, Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Engine keeps running at higher speed than specified idle speed.
• Engine keeps running at a lower speed than the specified idle speed.
• Engine stalls.
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:
MAIN RELAY
21
22
23
24
B220
E5 E6
E16 E17
1 2
B220
4
B137
E5 E16
#1 #2
FUEL INJECTOR
B21
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 36 37 38 39 40 41
42 43 44 45 46 47
48 49 50 51 52 53 54
EN(H4DOTC)(diag)-277
FUSE
(RELAY BLOCK)
15A
SBF-7
3
ECM
B21
E2
E6 E17
#3 #4
B220
1 2 9 13 17
10 14 18
3 4
11 12 15 16 19 20
5 6
7 8 25 29 33
26 30 34
27 28 31 32 35 36
ENGINE (DIAGNOSTICS)
BATTERY
E
B137
1 2 3 4 5
21
8 9 10 11 12 13 14 15
22
18 19 20 21 22 23
23 24
26 27 28 29
37
38
39 40
6 7
16 17
24 25
30 31
EN-05898