DTC B2784 Antenna Circuit (Push Engine Switch)

DTC DETECTING CONDITION:

When open or short circuit occurs in the antenna coil.

TROUBLE SYMPTOM:

The keyless access function may not be operable.

CAUTION: For replacement procedure of Keyless Access Control Module and steering lock CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.

WIRING DIAGRAM:

Immobilizer system <Ref. to WIRING DIAGRAM , Immobilizer System.>

Fig 1: Antenna Circuit (Push Engine Switch) - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK STEERING LOCK CM. Disconnect the push button ignition switch connector. Disconnect the Keyless Access Control Module connector. Using a tester, measure the resistance between the push button ignition switch connector and the Keyless Access Control Module connector terminals. Connector & terminal (i150) No. 14 - (B574) No. 1: (i150) No. 9 - (B574) No. 9: (i150) No. 10 - (B574) No. 7: (i150) No. 8 - (B574) No. 24:	Is the resistance less than 1 Ω?	Go to step 2 .	Repair or replace the open circuit of harness.
2 CHECK HARNESS (GROUND SHORT CIRCUIT). Using a tester, measure the resistance between the push button ignition switch connector and chassis ground terminals. Connector & terminal (i150) No. 14 - Chassis ground: (i150) No. 9 - Chassis ground: (i150) No. 10 - Chassis ground:	Is the resistance 10 kΩ or more?	Go to step 3 .	Repair or replace the short circuit of the harness.
3 CHECK PUSH BUTTON IGNITION SWITCH. Replace the push button ignition switch. <Ref. to Push Button Ignition Switch .> Using the Subaru Select Monitor, clear the memory. <Ref. to CLEAR MEMORY MODE .> Read the DTC using Subaru Select Monitor. <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .>	Is DTC B2784 displayed?	Replace the Keyless Access Control Module. <Ref. to Keyless Access Control Module .>	Malfunction occurred in the push button ignition switch.