Toyota Avalon Service & Repair Manual: Engine Control System Malfunction (C1201)

DESCRIPTION

If a malfunction in the SFI system is detected, the operation of VSC and TRAC is prohibited by the fail-safe function. When the signals from the engine are received normally, fail-safe control is canceled.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1201

Engine Control System Malfunction

Engine control system malfunction signal continues for 2.5 seconds.

SFI system

PROCEDURE

1.

CHECK SFI SYSTEM

(a) Check if SFI system DTCs are output.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

A

REPLACE ECM

B

INSPECT SFI SYSTEM

    Air Bag Circuit (C147D)

    NE Signal Circuit (C1224)

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