Subaru IMPREZA GD 2007 Series Manual page 2789

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CONTROL SYSTEMS
Step
1 CHECK STOP LIGHT SWITCH.
Depress the brake pedal.
2 CHECK HARNESS BETWEEN STOP LIGHT
SWITCH AND BODY INTEGRATED UNIT.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors of body inte-
grated unit and 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
SWITCH AND BODY INTEGRATED UNIT.
Measure the resistance of harness between
stop light switch and chassis ground.
Connector & terminal
(B65) No. 3 — Chassis ground:
4 CHECK HARNESS BETWEEN BODY INTE-
GRATED UNIT AND SHIFT LOCK SOLE-
NOID.
1) Disconnect the connector of shift lock sole-
noid.
2) Measure the harness resistance between
the body integrated unit and shift lock solenoid.
Connector & terminal
(B117) No. 4 — (B280) No. 9:
5 CHECK HARNESS BETWEEN BODY INTE-
GRATED UNIT AND SHIFT LOCK SOLE-
NOID.
Measure the resistance of harness between
shift lock solenoid and chassis ground.
Connector & terminal
(B117) No. 4 — Chassis ground:
6 CHECK HARNESS BETWEEN SHIFT LOCK
SOLENOID AND CHASSIS GROUND.
Measure the resistance of harness between
shift lock solenoid and chassis ground.
Connector & terminal
(B117) No. 5 — Chassis ground:
7 CHECK SHIFT LOCK SOLENOID.
Measure the resistance of the shift lock sole-
noid connector terminals.
Terminals
No. 4 — No. 5:
8 CHECK SHIFT LOCK SOLENOID.
Connect the battery to connector terminal of
shift lock solenoid, and operate the solenoid.
Terminals
No. 4 (+) — No. 5 (–):
9 CHECK POOR CONTACT.
AT Shift Lock Control System
Check
Does the stop light illuminate? Go to step 2.
Is the resistance 1 MΩ or
more?
Is the resistance less than 1 Ω? Repair the short
Is the resistance 1 MΩ or
more?
Is the resistance less than 1 Ω? Repair the short
Is the resistance 1 MΩ or
more?
Is the resistance between 20 —
40 Ω?
Is the shift lock solenoid operat-
ing properly?
Is there poor contact in connec-
tor?
CS-16
Yes No
Check the stop
light system.
Repair the open Go to step 3.
circuit of harness
between body inte-
grated unit and
stop light switch.
Go to step 4.
circuit of harness
between body inte-
grated unit and
stop light switch.
Go to step 5.
Repair the open
circuit of harness
between body inte-
grated unit and
shift lock solenoid.
Go to step 6.
circuit of harness
between body inte-
grated unit and
shift lock solenoid.
Repair open circuit Go to step 7.
of harness
between shift lock
solenoid and chas-
sis ground.
Go to step 8. Replace the shift
lock solenoid.
Go to step 9. Replace the shift
lock solenoid.
Repair the poor Replace the body
contact. integrated unit.