Subaru IMPREZA GD 2007 Series Manual page 3084

asieps_tobira_IM_US.book 49 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK DTC.
2 CHECK POWER SUPPLY FOR STEERING
ANGLE SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from steering
angle sensor.
3) Turn the ignition switch to ON. (engine OFF)
4) Measure the voltage between the steering
angle sensor and chassis ground.
Connector & terminal
(B426) No. 4 (+) — Chassis ground (–):
3 CHECK GROUND CIRCUIT OF STEERING
ANGLE SENSOR.
Measure the resistance between steering angle
sensor and chassis ground.
Connector & terminal
(B426) No. 3 — Chassis ground:
4 CHECK HARNESS BETWEEN STEERING
ANGLE SENSOR AND DRIVER'S CONTROL
CENTER DIFFERENTIAL CONTROL MOD-
ULE.
Measure the resistance between the steering
angle sensor and driver's control center differ-
ential control module.
Connector & terminal
(B426) No. 2 — (B380) No. 18:
(B426) No. 1 — (B380) No. 24:
5 CHECK DRIVER'S CONTROL CENTER DIF-
FERENTIAL CONTROL INPUT SIGNAL.
1) Connect all the connectors.
2) Connect the Subaru Select Monitor to the
vehicle.
3) Turn the ignition switch to ON. (engine OFF)
4) Using the Subaru Select Monitor, read "deg"
of the rudder angle sensor data. <Ref. to
6MT(diag)-15, OPERATION, Subaru Select
Monitor.>
MANUAL TRANSMISSION AND DIFFERENTIAL (DIAGNOSTICS)
Check
Is DTC P1720 displayed?
Is the voltage 12 V or more?
Is the resistance less than 1 Ω? Go to step 4.
Is the resistance less than 1 Ω? Go to step 5.
Does the Subaru select monitor
value change according to the
input from the steering to the
right and left?
6MT(diag)-49
Yes No
Perform the diag- Go to step 2.
nosis according to
DTC.
Go to step 3. Repair the open
circuit of the har-
ness between the
steering angle sen-
sor and driver's
control center dif-
ferential control
module.
Repair the open
circuit of the har-
ness between the
steering angle sen-
sor and driver's
control center dif-
ferential control
module.
Repair the open
circuit of the har-
ness between the
steering angle sen-
sor and driver's
control center dif-
ferential control
module.
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 and
steering angle sen-
sor.