Toyota Tacoma (2015-2018) Service Manual: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is displayed during the DTC check, check the circuit listed for the code in the table below (proceed to the page listed for that circuit).
1. Occupant Detection ECU
HINT:
When DTC B1650/32 is detected as a result of troubleshooting the Supplemental Restraint System, perform troubleshooting for the occupant classification system as shown in the chart below.
|
DTC Code |
Detection Item |
Trouble Area |
Passenger Airbag ON/OFF Indicator (OFF Indicator) |
See page |
|---|---|---|---|---|
|
B1771 |
Passenger Side Buckle Switch Circuit Malfunction |
1. Front seat inner belt assembly (Buckle switch RH) 2. No. 1 seat wire 3. Floor wire 4. Occupant detection ECU |
ON |
|
|
B1780 |
Front Occupant Classification Sensor LH Circuit Malfunction |
1. Front seat with adjuster frame assembly RH (Occupant classification sensor front LH) 2. No. 1 seat wire 3. Occupant detection ECU |
ON |
|
|
B1781 |
Front Occupant Classification Sensor RH Circuit Malfunction |
1. Front seat with adjuster frame assembly RH (Occupant classification sensor front RH) 2. No. 1 seat wire 3. Occupant detection ECU |
ON |
|
|
B1782 |
Rear Occupant Classification Sensor LH Circuit Malfunction |
1. Front seat with adjuster frame assembly RH (Occupant classification sensor rear LH) 2. No. 1 seat wire 3. Occupant detection ECU |
ON |
|
|
B1783 |
Rear Occupant Classification Sensor RH Circuit Malfunction |
1. Front seat with adjuster frame assembly RH (Occupant classification sensor rear RH) 2. No. 1 seat wire 3. Occupant detection ECU |
ON |
|
|
B1785 |
Front Occupant Classification Sensor LH Collision Detection |
1. Front seat with adjuster frame assembly RH (Occupant classification sensor front LH) 2. Occupant detection ECU |
ON |
|
|
B1786 |
Front Occupant Classification Sensor RH Collision Detection |
1. Front seat with adjuster frame assembly RH (Occupant classification sensor front RH) 2. Occupant detection ECU |
ON |
|
|
B1787 |
Rear Occupant Classification Sensor LH Collision Detection |
1. Front seat with adjuster frame assembly RH (Occupant classification sensor rear LH) 2. Occupant detection ECU |
ON |
|
|
B1788 |
Rear Occupant Classification Sensor RH Collision Detection |
1. Front seat with adjuster frame assembly RH (Occupant classification sensor rear RH) 2. Occupant detection ECU |
ON |
|
|
B1790 |
Center Airbag Sensor Assembly Communication Circuit Malfunction |
1. Floor wire 2. No. 1 seat wire 3. Occupant detection ECU 4. Airbag sensor assembly |
ON |
|
|
B1793 |
Occupant Classification Sensor Power Supply Circuit Malfunction |
1. Front seat with adjuster frame assembly RH (Occupant classification sensors) 2. No. 1 seat wire 3. Occupant detection ECU |
ON |
|
|
B1794 |
Open in Occupant Classification ECU Battery Positive Line |
1. Wire harness 2. Occupant detection ECU |
ON |
|
|
B1795 |
Occupant Classification ECU Malfunction |
1. Occupant detection ECU |
ON |
|
|
B1796 |
Sleep Operation Failure of Occupant Classification ECU |
1. Occupant detection ECU |
ON |
|
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Data List / Active Test
DATA LIST / ACTIVE TEST
HINT:
By accessing the Data List displayed by the Techstream, you can check values
of switches and sensors without removing any parts. Reading the Data List as the
first ...
Open in Occupant Classification ECU Battery Positive Line (B1794)
DESCRIPTION
DTC B1794 is set when a malfunction is detected in the occupant detection ECU.
DTC No.
DTC Detections Conditions
Trouble Areas
B1794
...
Other materials:
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT SPEEDOMETER
(a) Check speedometer operation.
NOTICE:
The meter ECU receives the vehicle speed signal from the skid control
ECU via CAN communication. Therefore, perform the following inspection referring
to values on the Data List of th ...
Lost Communication with Cruise Control Front Distance Range Sensor (U0235)
DESCRIPTION
The millimeter wave radar sensor assembly is connected to the skid control ECU
(master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 via
CAN communication. If communication with the skid control ECU (master cylinder solenoid)*1
or skid control ECU (brake act ...
Speed Sensor
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE TRANSMISSION REVOLUTION SENSOR (NT)
(a) Disconnect the transmission revolution sensor (NT) connector.
(b) Remove the bolt and transmission revolution sensor (NT). ...
