Speed Signal Circuit [08/2014 - ]: Procedure

1. Disconnect the F14 combination meter assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   F14-28 (+S) - Body ground	Ignition switch ON	4.5 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Combination Meter Assembly)

NG → See step   5 

OK: Go to next step 

1. Disconnect the A6 master cylinder solenoid (skid control ECU) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A6-12 (SP1) - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Master Cylinder Solenoid (Skid Control ECU))

NG → See step   4 

OK: Go to next step 

1. Check the input waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   1. Reconnect the F14 combination meter assembly connector.
   2. Remove the combination meter assembly with the connector(s) still connected.
   3. Connect an oscilloscope to terminal F14-29 (SI) and body ground.
   4. Turn the ignition switch to ON.
   5. Check the signal waveform according to the condition(s) in the table below.
      MEASUREMENT CONDITION
      
      

      Item	Condition
      Terminal No. (Symbol)	F14-29 (SI) - Body ground
      Tool setting	5 V/DIV., 20 ms./DIV.
      Condition	Driving at approx. 20 km/h (12 mph)

      OK

      The waveform displayed is as shown in the illustration.

      HINT: 

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

NG → See step   28 

OK → See step   22 

1. Disconnect the F14 combination meter assembly connector.
2. Disconnect the A6 master cylinder solenoid (skid control ECU) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F14-29 (SI) - A6-12 (SP1)	Always	Below 1 Ω
   A6-12 (SP1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   24 

1. Disconnect the F14 combination meter assembly connector.
2. Disconnect the 4B No. 4 junction block connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F14-28 (+S) - 4B-20	Always	Below 1 Ω
   F14-28 (+S) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect for a short in the circuit that is connected to the junction block connector shown in the wiring diagram.

   HINT: 

   If voltage is not present, it is possible that an ECU or circuit has a malfunction. The malfunctioning ECU or circuit will be diagnosed in the following steps.

   1. Disconnect the 4A No. 4 junction block connector.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      TEXT IN ILLUSTRATION
      
      

      *1	No. 4 Junction Block	-	-
      *a	Front view of wire harness connector (to No. 4 Junction Block)	-	-

   2. Disconnect the 4C No. 4 junction block connector.
   3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection	Switch Condition	Specified Condition
      4C-16 - Body ground	Ignition switch ON	4.5 to 14 V
      4B-8 - Body ground	Ignition switch ON	4.5 to 14 V
      4A-90 - Body ground	Ignition switch ON	4.5 to 14 V

      RESULT
      
      

      Result	Proceed to
      Voltage is not present in one circuit	A
      Voltage is present in all the circuits	B

B → REPLACE NO. 4 JUNCTION BLOCK 

A: Go to next step 

1. Select the circuit for which voltage was not present in the previous step.
   RESULT
   
   

   Tester Connection	System that Uses the Circuit	Proceed to
   4C-16 - Body ground	SFI system, smart key system*1, safety connect system*2, voltage inverter*1, intuitive parking assist system*3	A
   4B-8 - Body ground	Tire pressure warning system	B
   4A-90 - Body ground	Audio and visual system or navigation system	C

   • *1: w/ Smart Key System
   • *2: w/ Safety Connect System
   • *3: w/ Intuitive Parking Assist System

B → See step   16 

C → See step   17 

A: Go to next step 

1. Disconnect the 4C No. 4 junction block connector.
2. Disconnect the 5B No. 5 junction block connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4C-16 - 5B-25	Always	Below 1 Ω
   4C-16 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the 5A No. 5 junction block connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   5B-2 - 5A-13	Always	Below 1 Ω
   5B-2 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect for a short in the circuit that is connected to the junction block connector shown in the wiring diagram.
   1. Disconnect the 5C No. 5 junction block connector.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      TEXT IN ILLUSTRATION
      
      

      *1	No. 5 Junction Block	-	-
      *a	Front view of wire harness connector (to No. 5 Junction Block)	-	-

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

      Standard Voltage

      Tester Connection	Switch Condition	Specified Condition
      5B-14 - Body ground	Ignition switch ON	4.5 to 14 V
      5C-1 - Body ground*1	Ignition switch ON	4.5 to 14 V
      5A-1 - Body ground*1	Ignition switch ON	4.5 to 14 V
      5A-38 - Body ground*2	Ignition switch ON	4.5 to 14 V
      5A-73 - Body ground*3	Ignition switch ON	4.5 to 14 V

      • *1: w/ Smart Key System
      • *2: w/ Safety Connect System
      • *3: w/ Intuitive Parking Assist System
      RESULT
      
      

      Result	Proceed to
      Voltage is not present in one circuit	A
      Voltage is present in all the circuits	B

B → REPLACE NO. 5 JUNCTION BLOCK 

A: Go to next step 

1. Select the circuit for which voltage was not present in the previous step.
   RESULT
   
   

   Tester Connection	System that Uses the Circuit	Proceed to
   5B-14 - Body ground	SFI system	A
   5C-1 - Body ground*1	Voltage inverter	B
   5A-1 - Body ground*1	Smart key system	C
   5A-38 - Body ground*2	Safety connect system	D
   5A-73 - Body ground*3	Intuitive Parking Assist System	E

   • *1: w/ Smart Key System
   • *2: w/ Safety Connect System
   • *3: w/ Intuitive Parking Assist System

B → See step   13 

C → See step   14 

D → See step   15 

E → See step   20 

A: Go to next step 

1. Disconnect the F51 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F51-18 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   27 

1. Disconnect the N19 voltage inverter assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N19-2 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   30 

1. Disconnect the F80 power management control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F80-23 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   25 

1. Disconnect the F39 telematics transceiver connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F39-10 (SPDP) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   29 

1. Disconnect the F7 tire pressure warning ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F7-2 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   23 

1. Proceed to the appropriate inspection based on the components of the vehicle.
   COMPONENT
   
   

   Component	Proceed to
   for Navigation Receiver Type	A
   for Radio and Display Type	B
   for 9 Speakers Type	C

B → See step   19 

C → See step   21 

A: Go to next step 

1. Disconnect the G37 navigation receiver connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   G37-17 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → See step   26 

1. Disconnect the G49 radio and display receiver connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   G49-17 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   31 

1. Disconnect the F95 clearance warning ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F95-5 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   32 

1. Disconnect the N11 stereo component amplifier connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N11-11 (SPD) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   33