Toyota Tacoma 2015-2018 Service Manual: Diagnostic Trouble Code Chart

Toyota Tacoma 2015-2018 Service Manual / Engine Immobiliser / Engine Immobiliser System(w/o Smart Key System) / Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

HINT:

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

Transponder Key ECU Assembly

DTC Code	Detection Item	See page
B2780	Push Switch / Key Unlock Warning Switch Malfunction
B2784	Antenna Coil Open / Short
B2793	Transponder Chip Malfunction
B2794	Unmatched Encryption Code
B2797	Communication Malfunction No. 1
B2798	Communication Malfunction No. 2

HINT:

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

ECM

DTC Code	Detection Item	See page
B2799*1	Engine Immobiliser System Malfunction
B279986*2	Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid
B279A*1	Theft Deterrent System Communication Line High Fixation
B279A12*2	Engine Immobiliser System Circuit Short to Battery
B279C*1	Theft Deterrent System Presence Detection
B279C95*2	Engine Immobiliser System Incorrect Assembly

*1: for 2TR-FE
*2: for 2GR-FKS

Data List / Active Test

DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any p ...

Theft Deterrent System Communication Line High Fixation (B279A,B279A12)

DESCRIPTION If the communication line (EFIO-IMI) to the transponder key ECU assembly is stuck high (e.g. shorted to +B), the ECM stores this DTC. DTC No. DTC Detection Condit ...

Other materials:

Precaution
PRECAUTION HANDLING PRECAUTION FOR CRUISE CONTROL SYSTEM (a) Turn the cruise control system off using the cruise control main switch (ON-OFF button) when not using the cruise control system. (b) Be careful as the vehicle speed increases when driving downhill with the cruise control system con ...

Ambient Temperature Sensor Circuit (B1412)
DESCRIPTION The ambient temperature sensor is installed in front of the condenser to detect the ambient temperature which is used to control the air conditioning system AUTO mode. This sensor is connected to the air conditioning amplifier assembly and detects fluctuations in the ambient tempe ...

Occupant Classification ECU Malfunction (B1795)
DESCRIPTION DTC B1795 is set when a malfunction is detected in the occupant detection ECU. Troubleshoot DTC B1771 first when both DTCs B1771 and B1795 are present. DTC No. DTC Detections Conditions Trouble Areas B1795 Occupant detection ...