Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Steering Angle Sensor Communication Stop Mode

Toyota Tacoma 2015-2018 Service Manual / Can Communication / Can Communication System / Steering Angle Sensor Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Steering Angle Sensor Communication Stop Mode

Either condition is met:

  • Communication stop for "Spiral cable (Steering Angle Sensor)" is indicated on the "Communication Bus Check" screen of the Techstream.

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  • Communication system DTCs (DTCs that start with U) that correspond to "Steering Angle Sensor Communication Stop Mode" in "DTC Combination Table" are output.

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  • Spiral cable with sensor sub-assembly branch line or connector
  • Power source circuit of spiral cable with sensor sub-assembly
  • Spiral cable with sensor sub-assembly ground circuit
  • Spiral cable with sensor sub-assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

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  • Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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  • Some parts must be initialized and set when replacing or removing and installing parts.

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  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

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  • Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.

CHECK FOR OPEN IN CAN BUS LINES (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY BRANCH LINE)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the spiral cable with sensor sub-assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

S32-3 (CANH) - S32-2 (CANL)

Cable disconnected from negative (-) battery terminal

54 to 69 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Spiral Cable with Sensor Sub-assembly)

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)

OK

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

S32-1 (ESS) - Body ground

Cable disconnected from negative (-) battery terminal

Below 1 Ω

(b) Connect the cable to the negative (-) battery terminal.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

S32-4 (IG) - Body ground

Ignition switch ON

11 to 14 V

S32-5 (BAT) - Body ground

Always

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Spiral Cable with Sensor Sub-assembly)

OK

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

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