Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2004 2 - Engine Section (H4SO) Engine (Diagnostics) Engine Control Module (ECM) IO Signal

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Engine Control Module (ECM) IO Signal


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                              ENGINE CONTROL MODULE (ECM) I/O SIGNAL
ENGINE (DIAGNOSTICS)

5. Engine Control Module (ECM) I/O Signal
A: ELECTRICAL SPECIFICATION



                               To    B135                                                      To B137
                         7 6 5                  4 3 2 1                                      4 3               2 1
                        19 18 17 16 15 14 13 12 11 10 9 8                                   13 12 11 10 9 8 7 6 5
                        28 27    26 25 24    23 22    21 20                                 20 19    18 17 16 15 14




                               To     B136                                                      To    B134

                          6 5 4                   3 2 1                             8 7       6 5                 4 3      2 1
                         17 16 15 14 13 12 11 10 9 8 7                              23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
                         26 25    24 23 22 21    20 19 18                           35 34    33 32 31 30    29 28 27 26    25 24




                                                                                                                                             EN-02054


                                 Con-                                         Signal (V)
                                                Terminal
           Content              nector                        Ignition SW ON                                                       Note
                                                  No.                                 Engine ON (Idling)
                                 No.                           (Engine OFF)
Crank-      Signal (+)           B135               7                 0                    -7 -- +7                        Sensor output waveform
shaft posi- Signal (-)           B135               17                0                        0                                     --
tion sensor Shield               B135               28                0                        0                                     --
Camshaft Signal (+)              B135               6                 0                    -7 -- +7                        Sensor output waveform
position    Signal (-)           B135               18                0                        0                                     --
sensor      Shield               B135               28                0                        0                                     --
                                                                       Fully closed: 0.2 -- 1.0
               Signal            B135               13                                                                              --
                                                                       Fully opened: 4.2 -- 4.7
Throttle
               Power
position                         B135                3               5                           5                                  --
               supply
sensor
               GND (sen-
                                 B135               19               0                           0                                  --
               sor)
               Signal            B135               14               0                      0 -- 0.9                                --
Rear oxy-
               Shield            B137               15               0                          0                                   --
gen sen-
sor            GND (sen-
                                 B135               19               0                           0                                  --
               sor)
Front oxy-     Signal 1          B136                6           0 -- 1.0                   0 -- 1.0                                --
gen (A/F)
sensor        Signal 2           B136               17           0 -- 1.0                   0 -- 1.0                                --
heater
Rear oxygen sensor
                                 B136                4           0 -- 1.0                   0 -- 1.0                                --
heater signal
Engine        Signal             B135               12          1.0 -- 1.4                1.0 -- 1.4                     After warm-up the engine.
coolant
tempera-      GND (sen-
ture sen-                        B135               19               0                           0                       After warm-up the engine.
              sor)
sor
                                                                                                                      "5" and "0" are repeatedly dis-
Vehicle speed signal             B137               10             0 or 5                    0 or 5
                                                                                                                      played when vehicle is driven.
Starter switch                   B136               20               0                           0                          Cranking: 8 -- 14



                                                               EN(H4SO)-22
                           ENGINE CONTROL MODULE (ECM) I/O SIGNAL
                                                                                             ENGINE (DIAGNOSTICS)

                            Con-                             Signal (V)
                                    Terminal
           Content         nector              Ignition SW ON                                           Note
                                      No.                            Engine ON (Idling)
                            No.                 (Engine OFF)
                                                ON: 10 -- 13            ON: 13 -- 14
A/C switch                  B136      11                                                                 --
                                                    OFF: 0                 OFF: 0
Ignition switch             B136      10           10 -- 13               13 -- 14                        --
                                                             ON: 12



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