DTC B2788 IGN Signal Correlation (Steering Lock Cm)
DTC DETECTING CONDITION:
When mismatch occurs in the IG1 input of the steering lock CM for both LIN communication line input (IG1 input value of Keyless Access Control Module) and solid line input.
TROUBLE SYMPTOM:
The steering lock cannot be released.
CAUTION:
For replacement procedure of steering lock CM, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
WIRING DIAGRAM:
Push button start system <Ref. to WIRING DIAGRAM , Push Button Start System.>
- Engine type: FA
- Engine type: EJ
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK FUSE. Check the fuse. <Ref. to Relay and Fuse .> |
Is the check result OK? | Go to step 2 . | Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited. |
| 2 CHECK CURRENT DATA. Check the current data display of «Keyless Access with Push Button Start» using Subaru Select Monitor. <Ref. to READ CURRENT DATA .>
|
Is the display normal according to the ignition switch operation? | Go to step 3 . | Go to step 5 . |
3 CHECK HARNESS (OPEN CIRCUIT).
Connector & terminal (B424) No. 1 - Chassis ground: |
Is the resistance less than 1 Ω? | Go to step 4 . | Repair or replace the open circuit of harness. |
4 CHECK HARNESS.
|
Is the voltage 11 - 14 V with IG ON? Is the voltage less than 1 V with IG OFF? |
Replace the steering lock CM. <Ref. to REMOVAL , Steering Lock CM.> | Check the DC power supply circuit. |
| 5 CHECK DTC. Read the DTC using Subaru Select Monitor. <Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .> |
Is DTC B2271 displayed? | Perform the diagnosis of DTC B2271. <Ref. to DTC B2271 IGN RELAY CONTROL CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC).> | Replace the Keyless Access Control Module. <Ref. to REMOVAL , Keyless Access Control Module.> |