Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Impreza 2001-2002.2004-2007 Approved Subaru Impreza 2004 WRX STi 04. TRANSMISSION 01. CONTROL SYSTEMS 02. AT Shift Lock System
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AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
2. AT Shift Lock System
A: LOCATION
(4)
(7)
(2)
(3)
(6)
(1)
(5)
CS-00192
(1) Inhibitor switch (4) Key warning switch (7) Key lock solenoid
(2) Body integrated unit (5) Shift lock solenoid
(3) Stop light switch (6) "P" range switch
CS-7
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
(2)
(1)
CS-00006 CS-00194
(6)
(3)
(5)
CS-00193 CS-00085
(4)
(7)
CS-00008
CS-8
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
B: ELECTRICAL SPECIFICATION
B280 side B281 side
8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1
16 15 14 13 12 11 10 9 20 19 18 17 16 15 14 13 12 11
CS-00011
To Connector Input/Output signal
Contents Terminal No.
No. Measured value and measuring conditions
Battery power supply B280 2 9 -- 16 V
Ignition power supply B281 19 10 -- 15 V when ignition switch is at ON or START.
Ignition power supply B281 10 10 -- 15 V when ignition switch is at ACC.
0 V when select lever is in "P" range.
Inhibitor Switch ("P" range) B281 5 9 -- 16 V when select lever is in other ranges than "P"
range.
9 -- 16 V when stop light switch is ON.
Stop light switch B281 9
0 V when stop light switch is OFF.
0 V when select lever is in "P" range.
"P" range switch B281 6 9 -- 16 V when select lever is in other ranges than "P"
range.
8.5 -- 16 V when shift lock is released.
Shift lock solenoid signal B280 9
0 V when shift lock is operating.
9 -- 16 V when key is inserted.
Key warning switch signal B281 20
0 V when key is removed.
7.5 -- 16 V when turning ignition switch to ON, select
Key lock solenoid signal B280 3 lever is in "P" range and brake switch is ON.
0 V at other conditions than above.
Ground B280 4 --
Ground B280 13 --
CS-9
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
C: SCHEMATIC
OFF ACC ON
CS-00012
(1) Ignition switch (4) Body integrated unit (7) Shift lock solenoid
(2) Stop light switch (5) Inhibitor switch (8) "P" range switch
(3) Key warning switch (6) Key lock solenoid (9) Battery
CS-10
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
D: INSPECTION
1. SHIFT LOCK OPERATION
Step Check Yes No
1 CHECK SHIFT LOCK. While the brake pedal is not Inspect "SELECT Go to step 2.
1)Turn the ignition switch ON. depressed, can select lever LEVER SHIFT
2)Move the select lever to "P" range. move from "P" range to other LOCK CANNOT
ranges? BE RELEASED".
2 CHECK SHIFT LOCK. While the brake pedal is Go to step 3. Inspect "SELECT
depressed, can select lever LEVER CANNOT
move from "P" range to other BE SHIFT
ranges? LOCKED".
3 CHECK KEY INTERLOCK. When the select lever is in Inspect "KEY Go to step 4.
other than "P" range, does igni- INTERLOCK
tion switch turn to "LOCK" DOES NOT BE
position? LOCKED OR
RELEASED.
4 CHECK KEY INTERLOCK. When the select lever is in "P" AT shift lock sys- Inspect "KEY
range, does ignition switch turn tem is normal. INTERLOCK
to "LOCK" position? DOES NOT BE
LOCKED OR
RELEASED.
CS-11
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
2. BODY INTEGRATED UNIT POWER SUPPLY AND GROUND LINE
IGNITION SWITCH
OFF ACC ON
SBF-4 SBF-1
B
ACC
IG SBF-6
No.11
No.4
No.3
BATTERY
B19
A13
B10
A2
A4
A: B280
BODY INTEGRATED UNIT
B: B281
E
B281 B280
1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8
11 12 13 14 15 16 17 18 19 20 9 10 11 12 13 14 15 16
CS-00258
CS-12
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
Step Check Yes No
1 CHECK FUSE. Is the fuse (No. 3, 4 or 11) Replace the fuse Go to step 2.
Remove the fuse (No. 3, 4 and 11). blown out? (No. 3, 4 or 11). If
the replaced fuse
(No. 3, 4 or 11)
has blown out eas-
ily, repair short cir-
cuit in harness
between fuse and
body integrated
unit.
2 CHECK HARNESS CONNECTOR BETWEEN Is the resistance less than 1 Go to step 3. Repair the open
BODY INTEGRATED UNIT AND BODY ? circuit in harness
GROUND. between body
1)Turn the ignition switch to OFF. integrated unit and
2)Measure the resistance of harness between body ground.
body integrated unit and chassis ground.
Connector & terminal
(B280) No. 4 -- Chassis ground:
(B280) No. 13 -- Chassis ground:
3 CHECK BATTERY POWER SUPPLY. Is the voltage more than 9 V? Go to step 4. Repair the open
1)Turn the ignition switch to ON (engine OFF). circuit harness
2)Measure the voltages between body inte- between battery
grated unit and chassis ground. and body inte-
Connector & terminal grated unit, and
(B280) No. 2 (+) -- Chassis ground (-): poor contact in
coupling connec-
tor.
4 CHECK IGNITION POWER SUPPLY CIR- Is the voltage more than 9 V? Go to step 5. Repair the open
CUIT. circuit harness
1)Turn the ignition switch to ACC. between battery
2)Measure the voltage between body inte- and body inte-
grated unit and chassis ground. grated unit, and
Connector & terminal poor contact in
(B281) No. 10 (+) -- Chassis ground (-): coupling connec-
tor.
5 CHECK IGNITION POWER SUPPLY CIR- Is the voltage more than 9 V? Go to step 6. Repair the open
CUIT. circuit harness
1)Turn the ignition switch to ON (engine OFF). between battery
2)Measure the voltage between body inte- and body inte-
grated unit and chassis ground. grated unit, and
Connector & terminal poor contact in
(B281) No. 19 (+) -- Chassis ground (-): coupling connec-
tor.
6 CHECK POOR CONTACT. Is there poor contact in con- Repair the poor Replace the body
nector? contact. integrated unit.
CS-13
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
3. SELECT LEVER CANNOT BE SHIFT LOCKED
SBF-1
SBF-2
BATTERY
No.16
STOP LIGHT SWITCH
2
3
B65
B9
A: B280
BODY INTEGRATED UNIT
B: B281
A9
SHIFT LOCK SOLENOID
4
5
B117
E
B65 B117 B281 B280
1 2 1 2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8
3 4 3 4 5 6 11 12 13 14 15 16 17 18 19 20 9 10 11 12 13 14 15 16
CS-00259
CS-14
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
Step Check Yes No
1 CHECK STOP LIGHT SWITCH. Does the stop light turn on? Go to step 2. Inspect the stop
Depress the brake pedal. light system.
2 CHECK HARNESS BETWEEN STOP LIGHT Is the resistance more than 1 Repair the open Go to step 3.
SWITCH AND BODY INTEGRATED UNIT. M? circuit in harness
1)Turn the ignition switch to OFF. between body
2)Disconnect the body integrated unit and integrated unit and
stoplight switch connector. stop light switch.
3)Measure the resistance of harness between
stop light switch and body integrated unit.
Connector & terminal
(B65) No. 3 -- (B281) No. 9:
3 CHECK HARNESS BETWEEN STOP LIGHT Is the resistance less than 1 Repair the short Go to step 4.
SWITCH AND BODY INTEGRATED UNIT. ? circuit in harness
Measure the resistance of harness between between body
stop light switch and chassis ground. integrated unit and
Connector & terminal stop light switch.
(B65) No. 3 -- Chassis ground:
4 CHECK HARNESS BETWEEN BODY INTE- Is the resistance more than 1 Repair the open Go to step 5.
GRATED UNIT AND SHIFT LOCK SOLE- M? circuit in harness
NOID. between body
1)Disconnect the shift lock solenoid connector. integrated unit and
2)Measure the resistance of harness between shift lock solenoid.
body integrated unit and shift lock solenoid.
Connector & terminal
(B117) No. 4 -- (B280) No. 9:
5 CHECK HARNESS BETWEEN BODY INTE- Is the resistance less than 1 Repair the short Go to step 6.
GRATED UNIT AND SHIFT LOCK SOLE- ? circuit in harness
NOID. between body
Measure the resistance of harness between integrated unit and
shift lock solenoid and chassis ground. shift lock solenoid.
Connector & terminal
(B117) No. 4 -- Chassis ground:
6 CHECK HARNESS BETWEEN SHIFT LOCK Is the resistance more than 1 Repair the open Go to step 7.
SOLENOID AND CHASSIS GROUND. M? circuit in harness
Measure the resistance of harness between between shift lock
shift lock solenoid and chassis ground. solenoid and body
Connector & terminal ground.
(B117) No. 5 -- Chassis ground:
7 CHECK SHIFT LOCK SOLENOID. Is the resistance 20 -- 40 ? Go to step 8. Replace the shift
Measure the resistance of shift lock solenoid lock solenoid.
connector terminals.
Terminals
No. 4 -- No. 5:
8 CHECK SHIFT LOCK SOLENOID. Does the shift lock solenoid Go to step 9. Replace the shift
Connect the battery with shift lock solenoid operate properly? lock solenoid.
connector terminal and operate solenoid.
Terminals
No. 4 (+) -- No. 5 (-):
9 CHECK POOR CONTACT. Is there poor contact in con- Repair the poor Replace the body
nector? contact. integrated unit.
CS-15
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
4. SELECT LEVER SHIFT LOCK CANNOT BE RELEASED
SBF-1
SBF-2
BATTERY
IGNITION SWITCH
SBF-4
OFF ACC ON
B
ACC
No.16
IG
INHIBITOR SWITCH
STOP LIGHT SWITCH
P
No.11
No.4
9 3 2
5 4 3
T7 T3 B12 B65
B10
B19
B5
B9
A: B280
BODY INTEGRATED UNIT
B: B281
A9
SHIFT LOCK SOLENOID
4
5
B117
E E
B65 B117 B12 B281 B280
1 2 1 2 1 2 3 4 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8
3 4 3 4 5 6 5 6 7 8 11 12 13 14 15 16 17 18 19 20 9 10 11 12 13 14 15 16
9 10 11 12
T7
1 2 3 4 5 6
7 8 9 10 11 12
CS-00260
CS-16
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
Step Check Yes No
1 CHECK INHIBITOR SWITCH. Are combination meter indica- Go to step 2. Adjust the inhibi-
1)Turn the ignition switch to ON (engine OFF). tor light and select lever "P", tor switch and
2)Move the select lever from "P" to "1" range. "R", "N", "3", "2" and "1" cor- select cable.
rectly matched?
2 CHECK HARNESS BETWEEN INHIBITOR Is the resistance less than 1 Repair the short Go to step 3.
SWITCH AND BODY INTEGRATED UNIT. ? circuit in harness
1)Turn the ignition switch to OFF. between body
2)Disconnect the connector of transmission integrated unit and
harness and body integrated unit. transmission con-
3)Measure the resistance of harness between nector.
body integrated unit and chassis ground.
Connector & terminal
(B281) No. 5 -- Chassis ground:
3 CHECK HARNESS BETWEEN INHIBITOR Is the resistance more than 1 Repair the open Go to step 4.
SWITCH AND BODY INTEGRATED UNIT. M? circuit in harness
Measure the resistance of harness between between body
body integrated unit and inhibitor switch. integrated unit and
Connector & terminal transmission con-
(B12) No. 3 -- (B281) No. 5: nector
4 CHECK HARNESS BETWEEN INHIBITOR Is the resistance less than 1 Go to step 5. Repair the open
SWITCH AND CHASSIS GROUND. ? circuit in harness
Measure the resistance of harness between between body
body integrated unit and chassis ground. integrated unit and
Connector & terminal chassis ground.
(B12) No. 4 -- Chassis ground:
5 CHECK INHIBITOR SWITCH. Is the resistance more than 1 Repair or replace Go to step 6.
1)Move the select lever to "P" range. M? the inhibitor
2)Measure the resistance of transmission har- switch.
ness connector terminals.
Connector & terminal
(T3) No. 3 -- No. 4:
6 CHECK OUTPUT SIGNAL FOR BODY INTE- Is the voltage 9 -- 16 V? Go to step 7. Go to step 15.
GRATED UNIT.
1)Connect all connectors.
2)Turn the ignition switch to ON.
3)Measure the voltage between body inte-
grated unit and chassis ground.
Connector & terminal
(B281) No. 5 (+) -- Chassis ground (-):
7 CHECK STOP LIGHT SWITCH. Does the stop light turn on? Go to step 8. Inspect the stop
Depress the brake pedal. light system.
8 CHECK HARNESS BETWEEN STOP LIGHT Is the voltage more than 9 V? Go to step 9. Repair the open or
SWITCH AND AT SHIFT LOCK CONTROL short circuit in har-
MODULE. ness between
1)Depress the brake pedal. body integrated
2)Measure the voltage between body inte- unit and stop light
grated unit and chassis ground. switch.
Connector & terminal
(B281) No. 9 (+) -- Chassis ground (-):
9 CHECK HARNESS BETWEEN BODY INTE- Is the resistance more than 1 Repair the open Go to step 10.
GRATED UNIT AND SHIFT LOCK SOLE- M? circuit in harness
NOID. between body
1)Turn the ignition switch to OFF. integrated unit and
2)Disconnect the connector from shift lock shift lock solenoid.
solenoid and body integrated unit.
3)Measure the resistance of harness between
body integrated unit and shift lock solenoid.
Connector & terminal
(B280) No. 9 -- (B117) No. 4:
CS-17
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
Step Check Yes No
10 CHECK HARNESS BETWEEN BODY INTE- Is the resistance less than 10 Go to step 11. Repair the short
GRATED UNIT AND SHIFT LOCK SOLE- ? circuit in harness
NOID. between body
Measure the resistance of harness between integrated unit and
shift lock solenoid and chassis ground. shift lock solenoid.
Connector & terminal
(B280) No. 9 -- Chassis ground:
11 CHECK HARNESS BETWEEN SHIFT LOCK Is the resistance less than 1 Go to step 12. Repair the open
SOLENOID AND CHASSIS GROUND. ? circuit in harness
Measure the resistance of harness between between shift lock
shift lock solenoid and chassis ground. solenoid and chas-
Connector & terminal sis ground.
(B117) No. 5 -- Chassis ground:
12 CHECK SHIFT LOCK SOLENOID. Is the resistance 20 -- 40 ? Go to step 13. Replace the shift
Measure the resistance of shift lock solenoid lock solenoid.
connector terminals.
Terminals
No. 4 -- No. 5:
13 CHECK SHIFT LOCK SOLENOID. Is the shift lock solenoid oper- Go to step 14. Replace the shift
Connect the battery with shift lock solenoid ating properly? lock solenoid.
connector terminal and operate solenoid.
Terminals
No. 4 (+) -- No. 5 (-):
14 CHECK OUTPUT SIGNAL FOR AT SHIFT Is the voltage more than 8.5 V? Go to step 15. Replace the body
LOCK CONTROL MODULE. integrated unit.
1)Turn the ignition switch to ON (engine OFF).
2)Measure the voltage between body inte-
grated unit and chassis ground.
Connector & terminal
(B280) No. 9 (+) -- Chassis ground (-):
15 CHECK POOR CONTACT. Is there poor contact in con- Repair the poor Replace the body
nector? contact. integrated unit.
CS-18
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
5. KEY INTERLOCK DOES NOT LOCK OR RELEASE
SBF-2 SBF-1
No.6
BATTERY
KEY WARNING SWITCH
F45 B62
23 2
1
B74
B20
A: B280
BODY INTEGRATED UNIT
B: B281
B6
A3
"P" RANGE SWITCH
2
6
B73
B117
1
2
E E KEY LOCK SOLENOID
B73 B74 B117 B: B281 A: B280
1 2 1 1 2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8
2 3 4 5 6 11 12 13 14 15 16 17 18 19 20 9 10 11 12 13 14 15 16
F45
1 2 3 4 5 6 7 8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
CS-00261
CS-19
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
Step Check Yes No
1 CHECK HARNESS BETWEEN BATTERY Is the voltage 9 -- 16 V? Go to step 2. Repair the open or
AND KEY WARNING SWITCH. short circuit in har-
1)Disconnect the connector key warning ness between bat-
switch. tery and key
2)Measure the voltage of harness between key warning switch.
warning switch and chassis ground.
Connector & terminal
(B74) No. 2 (+) -- Chassis ground (-):
2 CHECK KEY WARNING SWITCH. Is the resistance more than 1 Replace the key Go to step 3.
Measure the resistance of key warning switch M? warning switch.
connector terminals.
Terminals
No. 1 -- No. 2:
3 CHECK KEY WARNING SWITCH. Is the resistance more than 1 Go to step 4. Replace the key
1)Remove the key. M? warning switch.
2)Measure the resistance of key warning
switch connector terminals.
Terminals
No. 1 -- No. 2:
4 CHECK HARNESS BETWEEN AT SHIFT Is the voltage more than 9 V? Go to step 5. Repair the open
LOCK CONTROL MODULE AND KEY circuit in harness
WARNING SWITCH. between body
1)Disconnect the body integrated unit connec- integrated unit and
tor. key warning
2)Measure the voltage of harness body inte- switch.
grated unit and chassis ground.
Connector & terminal
(B281) No. 20 (+) -- Chassis ground (-):
5 CHECK HARNESS BETWEEN BODY INTE- Is the resistance more than 1 Repair the open Go to step 6.
GRATED UNIT AND KEY LOCK SOLENOID. M? circuit in harness
1)Disconnect the connector of key lock sole- between body
noid. integrated unit and
2)Measure the resistance of harness between key lock solenoid.
body integrated unit and key lock solenoid.
Connector & terminal
(B73) No. 2 -- (B280) No. 3:
6 CHECK HARNESS BETWEEN BODY INTE- Is the resistance more than 1 Go to step 7. Repair the short
GRATED UNIT AND KEY LOCK SOLENOID. ? circuit in harness
Measure the resistance of harness between between body
body integrated unit and chassis ground. integrated unit and
Connector & terminal key lock solenoid.
(B280) No. 3 -- Chassis ground:
7 CHECK HARNESS BETWEEN KEY LOCK Is the resistance less than 10 Go to step 8. Repair the open
SOLENOID AND CHASSIS GROUND. ? circuit in harness
Measure the resistance of harness between between key lock
key lock solenoid and chassis ground. solenoid and chas-
Connector & terminal sis ground.
(B73) No. 1 -- Chassis ground:
8 CHECK KEY LOCK SOLENOID. Is the resistance 4 -- 8 ? Go to step 14. Replace the key
Measure the resistance of key lock solenoid lock solenoid.
connector terminals.
Terminals
No. 1 -- No. 2:
9 CHECK HARNESS BETWEEN "P" RANGE Is the resistance less than 1 Go to step 10. Repair the short
SWITCH AND CHASSIS GROUND. ? circuit in harness
Measure the resistance of harness between between "P" range
"P" range switch and chassis ground. switch and body
Connector & terminal integrated unit.
(B117) No. 2 -- Chassis ground:
CS-20
AT SHIFT LOCK SYSTEM
CONTROL SYSTEMS
Step Check Yes No
10 CHECK HARNESS BETWEEN AT SHIFT Is the resistance more than 1 Repair the open Go to step 11.
LOCK CONTROL MODULE AND "P" RANGE M? circuit in harness
SWITCH. between body
1)Disconnect the connector from "P" range integrated unit and
switch. "P" range switch.
2)Measure the resistance of harness between
body integrated unit and "P" range switch.
Connector & terminal
(B117) No. 2 -- (B281) No. 6:
11 CHECK HARNESS BETWEEN "P" RANGE Is the resistance more than 1 Repair the open Go to step 12.
SWITCH AND CHASSIS GROUND. M? circuit in harness
Measure the resistance of harness "P" range between "P" range
switch and chassis ground. switch and chassis
Connector & terminal ground.
(B117) No. 6 -- Chassis ground:
12 CHECK "P" RANGE SWITCH. Is the resistance less than 1 Go to step 13. Replace the "P"
1)Move the select lever to "P" range. ? range switch.
2)Measure resistance between "P" range
switch connector terminals.
Terminals
No. 2 -- No. 6:
13 CHECK "P" RANGE SWITCH. Is the resistance more than 1 Go to step 14. Replace the "P"
1)Move the select lever to other than "P" M? range switch.
range.
2)Measure resistance between "P" range
switch connector terminals.
Terminals
No. 2 -- No. 6:
14 CHECK OUTPUT SIGNAL FOR BODY INTE- Is the voltage 7.5 -- 16 V? Go to step 15. Replace the body
GRATED UNIT. integrated unit.
1)Connect all connectors.
2)Turn the ignition switch to ON (engine OFF).
3)Move the select lever to "P" range.
4)Press the brake pedal.
5)Measure the voltage between body inte-
grated unit connector and chassis ground.
Connector & terminal
(B280) No. 3 (+) -- Chassis ground (-):
15 CHECK POOR CONTACT. Is there poor contact in con- Repair the poor Replace the body
nector? contact. integrated unit.
CS-21
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