Toyota 4Runner: Diagnostic Trouble Code Chart

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/ Smart Key System) / Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

HINT:

If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below.

Certification ECU

DTC Code	Detection Item	Trouble Area
B2784	Antenna Coil Open / Short	- Certification ECU - Engine switch
B278A	Short to GND in Immobiliser System Power Source Circuit	- Harness or connector - Engine switch - Certification ECU
B2790	ID BOX EEPROM Malfunction	- ID code box - Certification ECU

DTC Code

Detection Item

Trouble Area

See page

B2784

Antenna Coil Open / Short

- Certification ECU

- Engine switch

B278A

Short to GND in Immobiliser System Power Source Circuit

- Harness or connector

- Engine switch

- Certification ECU

B2790

ID BOX EEPROM Malfunction

- ID code box

- Certification ECU

HINT:

The DTCs for the engine immobiliser system are specified above. If other codes are output, check the DTC chart for the SFI system.

ECM

DTC Code	Detection Item	Trouble Area
B2799	Engine Immobiliser System Malfunction	- Harness or connector - ECM - ID code box
B279A	Theft Deterrent System Communication Line High Fixation	- Harness or connector - ECM - ID code box
B279C	Theft Deterrent System Presence Detection	ECM

DTC Code

Detection Item

Trouble Area

See page

B2799

Engine Immobiliser System Malfunction

- Harness or connector

- ECM

- ID code box

B279A

Theft Deterrent System Communication Line High Fixation

- Harness or connector

- ECM

- ID code box

B279C

Theft Deterrent System Presence Detection

ECM

Data List / Active Test

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Dtc Check / Clear

DTC CHECK / CLEAR HINT: When using the Techstream with the engine switch off to troubleshoot: Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 ...

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