DTC Description

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DTC Description

DTC DETECTION LOGIC

DTC No.	M.U.T.-III SE screen items (Trouble diagnosis content)	DTC Detection Condition
U2140-81	CAN comm err (ECM) [Controller area network communication error (Engine control module)]	Diagnosis condition	When ignition switch is ON.
		Signal (terminal)	CAN communication signal
		Threshold	If air bag diagnosis sensor unit detects an error signal that is received from ECM via CAN communication
		Diagnosis delay time	2 seconds or more.

POSSIBLE CAUSE

ECM
Air bag diagnosis sensor unit

FAIL-SAFE

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DTC CONFIRMATION PROCEDURE

1.CHECK DTC PRIORITY

If DTC U2140-81 is displayed with Network-DTC, first perform the trouble diagnosis for Network-DTC.

Is applicable DTC detected?

Perform diagnosis of applicable. Refer to DTC IndexDTC Index

.

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2.CHECK SELF-DIAG RESULT

With M.U.T.-III SE

Ignition switch ON.
Perform “Self Diagnostic Result” mode of “AIR BAG” using M.U.T.-III SE.

Is malfunctioning part detected?

Refer to Diagnosis Procedure

.

-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident

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-2Confirmation after repair: INSPECTION END