Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 310
EN(H4DOTC)(diag)-464
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
6
CHECK SECONDARY AIR PUMP.
Check the appearance of secondary air pump
and the condition of impeller.
Is the secondary air pump free
from deformation, cracks and
other damages? And does the
impeller rotate smoothly?
End.
Step
Check
Yes
No
EN(H4DOTC)(diag)-465
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
FP:DTC P2610 ECM/PCM INTERNAL ENGINE OFF TIMER PERFORMANCE
DTC DETECTING CONDITION:
• Detected when two consecutive driving cycles with fault occur.
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-289, DTC P2610 ECM/PCM INTERNAL ENGINE OFF
TIMER PERFORMANCE, Diagnostic Trouble Code (DTC) Detecting Criteria.>
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-
FQ:DTC U0073 CAN FAILURE, BUS ‘OFF’ DETECTION
NOTE:
FR:DTC U0122 CAN (VDC) DATA NOT LOADED
NOTE:
FS:DTC U0140 CAN (BCU) DATA NOT LOADED
NOTE:
FT:DTC U0416 CAN (VDC) DATA ABNORMAL
NOTE:
FU:DTC U0422 CAN (BCU) DATA ABNORMAL
NOTE:
Step
Check
Yes
No
1
CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
The soak timer IC
is built into the
ECM.
EN(H4DOTC)(diag)-466
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
21.Diagnostic Procedure without Diagnostic Trouble Code (DTC)
A: CHECK SI-DRIVE (SUBARU INTELLIGENT DRIVE) SYSTEM
DIAGNOSIS:
SI-DRIVE mode does not switch.
CAUTION:
Note that SI-DRIVE system operates the following controls when it switches the modes.
1. Switches to S (SPORT) when turning the engine ON after turning the engine OFF in S# (SPORT
sharp) mode.
2. Returns to the mode last selected when turning the engine ON after turning the engine OFF in S
(SPORT) or I (Intelligent) mode.
3. Switches to S (SPORT) when the malfunction indicator light illuminates while the engine is run-
ning. In this case, Cannot switch to S# (SPORT sharp) or I (Intelligent) mode.
4. Cannot switch to S# (SPORT sharp), when engine coolant temperature tells that overheating may
occur. Switches to S (SPORT) while driving in S# (SPORT sharp) mode.
EN(H4DOTC)(diag)-467
Diagnostic Procedure without Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
1. SI-DRIVE MODE INDICATION DOES NOT CHANGE AND MODES DO NOT SWITCH AFTER
SWITCHING SI-DRIVE MODES
WIRING DIAGRAM:
• Engine electrical system, without SI-DRIVE <Ref. to WI-32, WITHOUT SI-DRIVE, WIRING DIAGRAM,
• Engine electrical system, with SI-DRIVE <Ref. to WI-48, WITH SI-DRIVE, WIRING DIAGRAM, Engine
Step
Check
Yes
No
1
CHECK SI-DRIVE SELECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the combi-
nation meter.
3) Measure the resistance between connec-
tors when the SI-DRIVE selector is operated.
Connector & terminal
(i10) No. 33 — (i10) No. 35:
Does the resistance change as
below?
S#: 3.48 — 3.85 kΩ
I: 0.95 — 1.05 kΩ
S: less than 1 Ω
EN-06527
*
i10
*
*
*
21
22
33
35
i53
R98
5
4
8
5
R33
I
S#
S
E
i97
i53
1 2 3
4 5 6 7
8 9 10 11 12 13 14 15 16
i97
2 3 4 5
1
6 7 8
i10
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
R33
1
5
2
3 4
6 7 8 9 10
COMBINATION METER
MULTI SELECT
SWITCH
(SI-DRIVE)
: TERMINAL No. OPTIONAL ARRANGEMENT
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