Check Using The DTC Check Sheet

WARNING: This page is about a different car, the 2024 Subaru Ascent. However, it is still accessible from the selected car via links, so may be relevant.

DTC check sheet

Bus off detection

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Data no-receive detection

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Data abnormal detection

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Authentication data detection, authentication data continuous detection, authentication data no-receive detection

Courtesy of SUBARU OF AMERICA, INC.

(A)	Installation check
(B)	Bus off detection
(C)	Data no-receive detection
(D)	Data abnormal detection
(E)	Authentication data detection
(F)	Authentication data continuous detection
(G)	Authentication data no-receive detection
ECM:	ECM
CGW:	Central gateway Control Module
TCM:	TCM
VDC:	VDC Control Module
EBB:	Electric brake booster Control Module
STA:	Steering angle sensor
EPS:	Power steering Control Module
A/C:	A/C Control Module
AHL:	Auto headlight beam leveler Control Module
A/B:	Airbag Control Module
EYE:	Stereo camera
EAM:	EyeSight assist monitor
MC:	Wide angle mono camera
RAB:	RAB Control Module
RDR:	Radar sensor LH (master)
KLE/TPM:	TPMS & keyless entry Control Module or keyless entry Control Module
KPS:	Keyless access Control Module
BIU:	Body integrated unit
MET:	Combination meter
CCM:	Cockpit control module
DCM:	Data communication module
DMS:	Driver Monitoring Unit
PSM:	Power seat Control Module
MIR:	Outer mirror Control Module
MVS:	Camera Control Module

MODULE INSTALLATION CHECK .
1. Using the check sheet for communication for initializing, check the vehicle installation module (module targeted for CAN communication).
2. Write "-" marks in the field for installation check (A) if the vehicle to be inspected does not have relevant module.
3. Write "-" marks in all blank fields on the same row that the "-" mark has filled in.
Was the module installation check above performed?

Yes: Go to 2.

No: Perform the module installation check, Go to 2.
CHECK DTC (BUS OFF DETECTION/DATA NOT RECEIVED) .
Check the DTC. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

NOTE: It becomes impossible for CAN diagnostic module to read DTC, if there is a current code regarding open harness (data not received). If this occurs, perform the "Check using the check sheet of communication for initializing" Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION>INSPECTION>CHECK USING THE CHECK SHEET OF COMMUNICATION FOR INITIALIZING , and use this check sheet to confirm that the corresponding part becomes the history code.

Is DTC bus off or data not received?

Yes: Go to 3.

No: Perform the diagnosis for the displayed DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
CHECK DTC (BUS OFF DETECTION/DATA NOT RECEIVED) .
Mark "X" in the field corresponding to the DTCs that has been detected by each module in the DTC check sheet.

Were all the corresponding fields in the DTC check sheet filled?

Yes: Go to 4.

No: Fill all the corresponding fields in the DTC check sheet, Go to 4.
CHECK CAN COMMUNICATION LINE .
Check the CAN communication line by referring to the example of DTC data not received.

Is CAN communication line faulty?

Yes: Repair or replace the faulty portion of the harness.

No: Perform the diagnosis for the displayed DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .