Speed Signal Circuit [02/2014 - 11/2015]: Procedure

1. Disconnect the F22 combination meter assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F22-3 (+S) - Body ground	Power switch on (IG)	4.5 to 14 V

   HINT: 

   If any of the ECUs specified in the wiring diagram supplies power to the combination meter assembly, the combination meter assembly will output a waveform.

   Proceed to
   OK
   NG

Result: 

NG 

See step  5

Result: 

OK 

Go to next step 

1. Disconnect the A63 skid control ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Skid Control ECU Assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A63-22 (SP1) - Body ground	Power switch on (IG)	11 to 14 V

   Proceed to
   OK
   NG

Result: 

NG 

See step  4

Result: 

OK 

Go to next step 

1. Check the input waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Combination Meter Assembly)

   1. Remove the combination meter assembly with the connector(s) still connected.
   2. Connect an oscilloscope to terminal F22-4 (SI) and body ground.
   3. Turn the power switch on (IG).
   4. Turn a wheel slowly.
   5. Check the signal waveform according to the condition(s) in the table below.

      Item	Condition
      Tool setting	5 V/DIV., 20 ms./DIV.
      Vehicle condition	Power switch on (IG), wheel being rotated

      OK

      The waveform is similar to that 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.

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY: 

Refer to REMOVAL [02/2014 - ] .

Result: 

NG 

REPLACE SKID CONTROL ECU ASSEMBLY: 

Refer to REMOVAL [02/2014 - ] .

1. Disconnect the F22 combination meter assembly connector.
2. Disconnect the A63 skid control ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F22-4 (SI) - A63-22 (SP1)	Always	Below 1 Ω
   F22-4 (SI) - Body ground	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY: 

Refer to REMOVAL [02/2014 - ] .

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the F22 combination meter assembly connector.
2. Disconnect the F95 No. 4 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F22-3 (+S) - F95-22	Always	Below 1 Ω
   F22-3 (+S) - Body ground	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

Go to next step 

1. Inspect for a short in the wire harness and connectors connected to the No. 4 junction 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.

2. Disconnect the F94 No. 4 junction connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F94-12 - Body ground	Power switch on (IG)	4.5 to 14 V
   F94-13 - Body ground*1	Power switch on (IG)	4.5 to 14 V
   F94-14 - Body ground*2	Power switch on (IG)	4.5 to 14 V
   F95-19 - Body ground	Power switch on (IG)	4.5 to 14 V
   F95-20 - Body ground	Power switch on (IG)	4.5 to 14 V
   *1: for 12 Speakers *2: w/ Manual (SOS) Switch

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

Result: 

B 

REPLACE NO. 4 JUNCTION CONNECTOR 

Result: 

A 

Go to next step 

1. Select the circuit for which voltage was not present in step 6.

   Result	System that uses the circuit	Proceed to
   F95-19 - Body ground	Vehicle proximity notification system	A
   F95-20 - Body ground	Smart key system	B
   F94-12 - Body ground	Audio and visual system*1 or Navigation system*2	C
   F94-13 - Body ground	Navigation system*3	D
   F94-14 - Body ground	Safety connect system*4	E
   *1: for Radio and Display Type *2: for Navigation Receiver Type *3: for 12 Speakers *4: w/ Manual (SOS) Switch

Result: 

B 

See step  9

Result: 

C 

See step  10

Result: 

D 

See step  11

Result: 

E 

See step  12

Result: 

A 

Go to next step 

1. Disconnect the F17 vehicle approaching speaker controller connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F17-6 (SPD) - Body ground	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER: 

Refer to REMOVAL [02/2014 - ] .

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the F15 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
   F15-16 (SPDI) - Body ground	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POWER MANAGEMENT CONTROL ECU: 

Refer to REMOVAL [02/2014 - 11/2016] .

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the F71 radio and display receiver assembly*1 or F116 navigation receiver assembly*2 connector.
   • *1: for Radio and Display Type

     *2: for Navigation Receiver Type

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F71-17 (SPD) - Body ground*1	Always	10 kΩ or higher
   F116-17 (SPD) - Body ground*2	Always	10 kΩ or higher
   *1: for Radio and Display Type *2: for Navigation Receiver Type

   Result	Proceed to
   OK (for Radio and Display Type)	A
   OK (for Navigation Receiver Type)	B
   NG	C

Result: 

A 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY: 

Refer to PROCEDURE - Step 1 .

Result: 

B 

REPLACE NAVIGATION RECEIVER ASSEMBLY: 

Refer to REMOVAL [02/2014 - ] .

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the F76 stereo component amplifier assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F76-11 (SPD) - Body ground	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY: 

Refer to REMOVAL [02/2014 - ] .

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the F35 DCM (telematics transceiver) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F35-10 (SPDP) - Body ground	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE DCM (TELEMATICS TRANSCEIVER): 

Refer to REMOVAL [02/2014 - ] .

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR