2004 SUBARU FORESTER check engine

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Page 2280 of 2870

SUBARU FORESTER 2004  Service Repair Manual EN(H4DOTC 2.5)-256
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
14 CHECK HARNESS BETWEEN ECM AND AC-
CELERATOR PEDAL POSITION SENSOR.
1) Turn the ignition switch to OFF.

Page 2281 of 2870

SUBARU FORESTER 2004  Service Repair Manual EN(H4DOTC 2.5)-257
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
19 CHECK HARNESS BETWEEN ECM AND AC-
CELERATOR PEDAL POSITION SENSOR.
1) Turn the ignition switch to OFF.

Page 2283 of 2870

SUBARU FORESTER 2004  Service Repair Manual EN(H4DOTC 2.5)-259
ENGINE (DIAGNOSTIC)
General Diagnostic Table
*1: Check ignition coil & ignitor ASSY and spark plug.
*2: Indicate the symptom occurring only in cold temperatures.
*3: Ensure the secu

Page 2342 of 2870

SUBARU FORESTER 2004  Service Repair Manual 4AT-30
AUTOMATIC TRANSMISSION
Automatic Transmission Fluid
2. Automatic Transmission Flu-
id
A: INSPECTION
NOTE:
The level of ATF varies with fluid temperature. Pay
attention to the ATF temperature wh

Page 2344 of 2870

SUBARU FORESTER 2004  Service Repair Manual 4AT-32
AUTOMATIC TRANSMISSION
Road Test
4. Road Test 
A: INSPECTION
1. GENERAL PRECAUTION
Road tests should be conducted to properly diag-
nose the condition of the automatic transmission.
NOTE:
When

Page 2345 of 2870

SUBARU FORESTER 2004  Service Repair Manual 4AT-33
AUTOMATIC TRANSMISSION
Stall Test
5. Stall Test 
A: INSPECTION
NOTE:
The stall test is of extreme importance in diagnos-
ing the condition of the automatic transmission and
the engine. It shoul

Page 2347 of 2870

SUBARU FORESTER 2004  Service Repair Manual 4AT-35
AUTOMATIC TRANSMISSION
Time Lag Test
6. Time Lag Test 
A: INSPECTION
NOTE:
If the select lever is shifted while the engine is
idling, there will be a certain time elapse or lag be-
fore the sho

Page 2348 of 2870

SUBARU FORESTER 2004  Service Repair Manual 4AT-36
AUTOMATIC TRANSMISSION
Line Pressure Test
7. Line Pressure Test 
A: MEASUREMENT
NOTE:
If the clutch or the brake shows a sign of slippage or
shifting sensation is not correct, the line pressure