Subaru IMPREZA GD 2007 Series Manual page 3087

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
MANUAL TRANSMISSION AND DIFFERENTIAL (DIAGNOSTICS)
Step
1 CHECK HARNESS BETWEEN DRIVER'S
CONTROL CENTER DIFFERENTIAL CON-
TROL MODULE AND TRANSMISSION HAR-
NESS.
1) Turn the ignition switch to OFF.
2) Disconnect the driver's control center differ-
ential control module harness connector.
3) Disconnect the transmission harness con-
nector and the bulk harness connector.
4) Measure resistance of the harness between
driver's control center differential control mod-
ule harness connector and the transmission
harness connector.
Connector & terminal
(B381) No. 9 — (B128) No. 1:
(B381) No. 24 — (B128) No. 4:
2 CHECK HARNESS BETWEEN DRIVER'S
CONTROL CENTER DIFFERENTIAL CON-
TROL MODULE AND TRANSMISSION HAR-
NESS.
Measure the resistance between the driver's
control center differential control module con-
nector and chassis ground.
Connector & terminal
(B381) No. 9 — Chassis ground:
(B381) No. 24 — Chassis ground:
3 CHECK CENTER DIFFERENTIAL.
Measure the resistance between transmission
harness connector terminals.
Connector & terminal
(T9) No. 1 — No. 4:
4 DRIVER'S CONTROL CENTER DIFFEREN-
TIAL CONTROL MODULE OUTPUT SIGNAL
CHECK.
1) Connect all harness connectors.
2) Turn the ignition switch to ON. (engine OFF)
3) Release the parking brake.
4) Press the manual mode switch, and change
the driver's control center differential to manual
mode.
5) Switch the center differential control dial in
the differential lock position.
6) Measure the voltage between the driver's
control center differential control module har-
ness connectors.
Connector & terminal
(B381) No. 9 (+) — (B381) No. 24 (–):
Check
Is the resistance less than 1 Ω? Go to step 2.
Is the resistance 1 MΩ or
more?
Is the resistance 1.2 — 2.5 Ω? Go to step 4.
Is the voltage 7.0 — 9.0 V?
6MT(diag)-52
Yes No
Repair the bulk
harness open cir-
cuit between the
driver's control
center differential
control module and
transmission har-
ness.
Go to step 3.
Repair the bulk
harness short cir-
cuit between the
driver's control
center differential
control module and
transmission har-
ness.
Replace the center
differential.
Go to step 5. Go to step 6.