Steering Pad Switch Circuit [07/2020 -]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Combination Meter > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Multi Switch (Up)	Steering pad switch (Up)	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Multi Switch (Down)	Steering pad switch (Down)	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Multi Switch (Menu)	Steering pad switch (Trip)	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Multi Switch (Enter)	Steering pad switch (Enter)	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Multi Switch (Right)	Steering pad switch (Right)	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Multi Switch (Left)	Steering pad switch (Left)	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Multi Switch (Back)	Steering pad switch (Back)	OFF or ON	OFF: Switch released ON: Switch pushed	-

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Multi Switch (Up)
   Multi Switch (Down)
   Multi Switch (Menu)
   Multi Switch (Enter)
   Multi Switch (Right)
   Multi Switch (Left)
   Multi Switch (Back)

   Result

   Result	Proceed to
   The value of each Data List item changes correctly in accordance with the operation of the steering pad switch	A
   The value of all Data List items do not change correctly in accordance with the operation of the steering pad switch	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE). Refer to  DISASSEMBLY [11/2015 -] 

Result: 

B 

See step  2

1. Remove the steering pad switch assembly.

   Refer to REMOVAL [07/2020 -]

2. Inspect the steering pad switch assembly.

   Refer to INSPECTION [12/2018 -]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  REMOVAL [07/2020 -] 

Result: 

OK 

See step  3

1. Remove the spiral cable sub-assembly.

   Refer to REMOVAL [07/2020 -]

2. Inspect the spiral cable sub-assembly.

   Refer to INSPECTION [12/2018 -]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  REMOVAL [07/2020 -] 

Result: 

OK 

See step  4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F21-10 (+DP) - Body ground	Power switch on (IG)	4.8 to 5.2 V
   F21-11 (+DP2) - Body ground	Power switch on (IG)	4.8 to 5.2 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  8

Result: 

OK 

See step  5

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   w/o Navigation System	A
   w/ Navigation System	B

Result: 

B 

See step  7

Result: 

A 

See step  6

1. Disconnect the F118 radio and display receiver assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F118-24 (SWG) - F21-3 (EAU)	Always	Below 1 Ω
   F118-1 (GND1) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [08/2019 -] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the F92 and F93 navigation receiver assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F92-23 (SWG) - F21-3 (EAU)	Always	Below 1 Ω
   F93-7 (GND1) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NAVIGATION RECEIVER ASSEMBLY. Refer to  REMOVAL [07/2020 -] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the F6 combination meter assembly (meter circuit plate) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F21-10 (+DP) - F6-1 (MSM+)	Always	Below 1 Ω
   F21-11 (+DP2) - F6-2 (MSTI)	Always	Below 1 Ω
   F21-10 (+DP) or F6-1 (MSM+) - Body ground	Always	10 kΩ or higher
   F21-11 (+DP2) or F6-2 (MSTI) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE). Refer to  DISASSEMBLY [11/2015 -] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR