Subaru IMPREZA GD 2007 Series Manual page 3073

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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 ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the driver's
control center differential control module, com-
bination meter and ECM.
3) Measure resistance of the harness between
the driver's control center differential control
module and the ECM harness connector.
Connector & terminal
(B380) No. 6 — (B136) No. 22:
2 CHECK HARNESS BETWEEN DRIVER'S
CONTROL CENTER DIFFERENTIAL CON-
TROL MODULE AND ECM.
Measure the resistance between the driver's
control center differential control module con-
nector and chassis ground.
Connector & terminal
(B380) No. 6 — Chassis ground:
3 CHECK HARNESS BETWEEN DRIVER'S
CONTROL CENTER DIFFERENTIAL CON-
TROL MODULE AND ECM.
1) Turn the ignition switch to ON.
2) Measure the resistance between the
driver's control center differential control mod-
ule connector and chassis ground.
Connector & terminal
(B380) No. 6 (+) — Chassis ground (–):
4 CHECK DRIVER'S CONTROL CENTER DIF-
FERENTIAL CONTROL MODULE INPUT
SIGNAL.
1) Turn the ignition switch to OFF.
2) Connect all the connectors.
3) Start the engine and let it idle.
5 CHECK DRIVER'S CONTROL CENTER DIF-
FERENTIAL CONTROL MODULE INPUT
SIGNAL.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to the
data link connector.
3) Start the engine, and run the Subaru Select
Monitor.
4) Idle the engine.
5) Read the data of engine speed using Sub-
aru Select Monitor.
Check
Is the resistance less than 1 Ω? Go to step 2.
Is the resistance 1 MΩ or
more?
Is the voltage less than 1 V?
Is the tachometer in the combi-
nation meter working properly?
Is the rpm reading about the
same as the tachometer read-
ing shown on the combination
meter?
6MT(diag)-38
Yes No
Repair the harness
open circuit
between the
driver's control
center differential
control module and
the ECM.
Go to step 3. Repair the harness
short circuit
between the
driver's control
center differential
control module and
the ECM.
Go to step 4.
Repair the harness
short circuit
between the
driver's control
center differential
control module and
the ECM.
Go to step 5. Inspect the ECM.
Even if the center Repair the poor
differential indica- contact.
tor light (differential
free position) is
blinking, the circuit
operating properly
at this time. A tem-
porary poor con-
tact of connector or
harness may be
the cause. Repair
the harness or
connector between
the driver's control
center differential
control module,
ECM, and combi-
nation meter.