MONITOR DESCRIPTION The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is functioning properly. The output voltage is usually 0 V when the power switch is turned off. If the output voltage is 7 V or higher when the power switch is turned off, the ECM will illuminate the MIL and store this DTC when the power switch is turned to on (IG).
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
CONFIRMATION DRIVING PATTERN HINT:
CAUTION / NOTICE / HINT NOTICE:
HINT: Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred. PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Clear the DTCs. Powertrain > Engine > Clear DTCs(e) Turn the power switch off.
(a) Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute. (b) Connect the cable to the negative (-) auxiliary battery terminal. (c) Turn the power switch on (IG). (d) Wait 10 seconds or more. (e) Turn the power switch off. (f) Wait 15 seconds or more. (g) Connect the Techstream to the DLC3. (h) Turn the power switch on (IG). (i) Turn the Techstream on. (j) Wait 5 seconds or more. (k) Enter the following menus: Powertrain / Engine / Trouble Codes. (l) Read the DTCs. Powertrain > Engine > Trouble Codes
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Smart Key System(for Start Function, Gasoline Model): Engine Immobiliser System Incorrect Assembly (B279C95)
DESCRIPTION If an ECM that is incompatible with the immobiliser function is installed, the ECM will store this DTC. DTC No. Detection Item DTC Detection Condition Trouble Area Note B279C95 Engine Immobiliser System Incorrect Assembly An ECM that is incompatible with the immobiliser function is insta ...