Toyota Tacoma manuals

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

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:

Operation Check
OPERATION CHECK 1. CHECK POWER DOOR LOCK OPERATION NOTICE: The operation check below is based on the non-customized initial condition of the vehicle. (a) Check basic functions. (1) Check that all doors lock when the lock side of the door control switch is pressed. (2) Check that all doors ...

Installation
INSTALLATION PROCEDURE 1. INSTALL VANE PUMP (a) Install the vane pump assembly with the 2 bolts. Torque: 21 N·m {214 kgf·cm, 15 ft·lbf} (b) Connect the oil pressure switch connector. NOTICE: Make sure that no oil adheres to the connector. ...

Inspection
INSPECTION PROCEDURE 1. INSPECT INPUT SHAFT (a) Using a dial indicator and 2 V-blocks, measure the shaft runout. Maximum runout: 0.03 mm (0.0012 in.) If the runout is more than the maximum, replace the input shaft. HINT: Measure the 3 areas shown in the illustration wit ...

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