DTC C1A75-87: Steering Vibrator System Missing Message [09/2020 - ]: Procedure

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INSPECT SPIRAL CABLE SUB-ASSEMBLY
Refer to INSPECTION [10/2016 - ]

Result

Proceed to

OK

NG

Result:

NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to REMOVAL [10/2016 - ]

Result:

OK

See step 2

INSPECT FORWARD RECOGNITION CAMERA (WAVEFORM)

Turn the engine switch on (IG).

Using an oscilloscope, measure the waveform at the K26 spiral cable sub-assembly connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measurement Condition

Tester Connection	Condition	Tester Range
K26-9 (LDA) - Body ground	Engine switch on (IG)	5 V/DIV., 1 ms/DIV.

NOTE:

The oscilloscope waveform is for reference only and does not include noise, fluctuations, etc.

A waveform similar to that in the illustration can be observed.

Result

Proceed to
OK
NG

Result:

See step 5

Result:

See step 3

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - POWER SOURCE)

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

Standard Voltage

Tester Connection	Condition	Specified Condition
K140-4 (BHT) - Body ground	Engine switch on (IG)	11 to 14 V

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 4

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
K140-2 (EHT) - Body ground	Always	Below 1 Ω

Result

Proceed to
OK
NG

Result:

REPLACE STEERING VIBRATION ECU. Refer to REMOVAL [10/2016 - 11/2021] , or refer to REMOVAL [11/2021 - ]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - FORWARD RECOGNITION CAMERA)

Disconnect the S18 forward recognition camera connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
K26-9 (LDA) - S18-2 (STRV)	Always	Below 1 Ω
K26-9 (LDA) or S18-2 (STRV) - Body ground	Engine switch off	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPLACE FORWARD RECOGNITION CAMERA. Refer to REMOVAL [09/2020 - ]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR