Subaru IMPREZA GD 2007 Series Manual page 3103

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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 NEUTRAL POSITION
SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the driver's
control center differential control module, ECM
and neutral position switch.
3) Measure resistance of the harness between
the driver's control center differential control
module and the neutral position switch harness
connectors.
Connector & terminal
(B380) No. 15 — (B128) No. 2:
2 CHECK HARNESS BETWEEN DRIVER'S
CONTROL CENTER DIFFERENTIAL CON-
TROL MODULE AND NEUTRAL POSITION
SWITCH.
Measure resistance of the harness between the
driver's control center differential control mod-
ule connector and the chassis ground
Connector & terminal
(B380) No. 15 — Chassis ground:
3 CHECK HARNESS BETWEEN NEUTRAL
POSITION SWITCH AND CHASSIS
GROUND.
Measure the resistance of the harness between
the neutral position switch connector and
engine ground.
Connector & terminal
(B128) No. 5 — Engine ground:
4 CHECK NEUTRAL POSITION SWITCH.
1) Place the shift lever in neutral.
2) Measure the resistance between transmis-
sion harness connector terminals.
Connector & terminal
(T9) No. 2 — No. 5:
5 CHECK NEUTRAL POSITION SWITCH.
1) Place the shift lever in a position except for
neutral.
2) Measure the resistance between transmis-
sion harness connector terminals.
Connector & terminal
(T9) No. 2 — No. 5:
6 CHECK DRIVER'S CONTROL CENTER DIF-
FERENTIAL CONTROL MODULE INPUT
SIGNAL.
1) Connect all the connectors.
2) Turn the ignition switch to ON.
3) Turn on the Subaru Select Monitor.
4) Place the shift lever in neutral.
5) Read the data of "Neutral Switch" using the
Subaru Select Monitor.
Check
Is the resistance less than 1 Ω? Go to step 2.
Is the resistance 1 MΩ or
more?
Is the resistance less than 1 Ω? Go to step 4.
Is the resistance less than 1 Ω? Go to step 5.
Is the resistance 1 MΩ or
more?
Is the "ON" displayed?
6MT(diag)-68
Yes No
Repair the open
circuit of the har-
ness between the
neutral position
switch connector
and engine
ground.
Go to step 3. Repair the short
circuit of the har-
ness between the
neutral position
switch connector
and driver's control
center differential
control module.
Repair the open or
poor contact of the
harness between
the neutral position
switch connector
and engine
ground.
Replace the neu-
tral position switch.
Go to step 6.
Replace the neu-
tral position switch.
Go to step 7. Repair the poor
contact.