B2277

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2277: Detecting Vehicle Submersion
B2277 - Detecting Vehicle Submersion

DESCRIPTION

This DTC is output when the submersion circuit monitor inside the main body ECU (instrument panel junction block) detects that the vehicle is submerged in water.

HINT
When the main body ECU (instrument panel junction block) is replaced with a new one and the cable from the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU (instrument panel junction block) is replaced, perform the registration procedures for the engine immobiliser system Engine Immobiliser System (W/ Smart Key System).





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR WATER DAMAGE

(a) Check the main body ECU (instrument panel junction block), peripheral components, and wire harnesses for traces of water.

OK:

There are no traces of water.

NG -- TAKE APPROPRIATE MEASURES AGAINST CAUSE OF WATER DAMAGE AND REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
OK -- Continue to next step.

2. CHECK FOR DTC

(a) Clear the DTC Smart Key System (for Start Function).

(b) Turn the engine switch on (IG).

(c) After 330 seconds have elapsed, check if the trouble occurs again.

OK:

DTC B2277 is not output.

NG -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting