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Diagnostic Procedure With Cancel Code: 16

Detected when ignition switch is turned to OFF or malfunction related to the ignition switch occurs.

Trouble symptom: 

Cruise control cannot be set.

Wiring diagram: 

Cruise control system Ref. to WIRING SYSTEM>CRUISE CONTROL SYSTEM>WIRING DIAGRAM .

G11256898Courtesy of SUBARU OF AMERICA, INC.
CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to CRUISE CONTROL (DIAGNOSTICS)>General Description>CAUTION .
  1. CHECK IGNITION SWITCH CIRCUIT  .
    1. Turn the ignition switch to OFF.
    2. Disconnect the ECM connector.
    3. Turn the ignition switch to ON.
    4. Measure the voltage between ECM connector and chassis ground.

      Connector and terminal 

      (B134) No. 56 (+) - Chassis ground (-):

      Is the voltage 10 V or more?

      Yes  : Check for poor contact of ECM connector.

      No  :

      • Check fuse No. 5 (fuse and relay box).
      • Check the harness for open or short circuit between ignition switch and ECM.