Speedometer Malfunction [11/2015 - ]: Procedure

1. Check if CAN communication DTCs are output (Refer to DIAGNOSIS SYSTEM [11/2015 - 06/2017] Refer to DIAGNOSIS SYSTEM [06/2017 - ] w/ Toyota Safety Sense C. Refer to DIAGNOSIS SYSTEM [11/2015 - ] w/o Toyota Safety Sense C).

   Result

   Result	Proceed to
   DTCs are not output.	A
   DTCs are output (w/ Toyota Safety Sense C).	B
   DTCs are output (w/o Toyota Safety Sense C).	C

Result: 

B 

REFER TO CAN COMMUNICATION SYSTEM 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - ] )

Result: 

C 

REFER TO CAN COMMUNICATION SYSTEM 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - ] )

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
5. Check the operation by referring to the table below.
   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Speed Meter Operation	Speedometer	OFF, 0, 40, 80, 120, 160 mph*1	There is a deviation in the values displayed on the speedometer*1 (Control range → Speedometer display) 0 → 0 40 → 38.8 to 41.6 80 → 78.8 to 82.0 120 → 119.1 to 122.3 160 → 159.3 to 162.5
   		OFF, 0, 40, 80, 120, 160 km/h*2	There is a deviation in the values displayed on the speedometer*2 (Control range → Speedometer display) 0 → 0 40 → 38.0 to 42.5 80 → 77.9 to 82.9 120 → 118.2 to 123.2 160 → 158.4 to 163.4

   • *1: for U.S.A.
   • *2: except U.S.A.

   OK

   Speedometer indication is normal.

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [11/2015 - ] )

Result: 

OK 

See step  3

1. Check if brake control system DTCs are output (Refer to DTC CHECK / CLEAR [11/2015 - ] ).

   Result

   Result	Proceed to
   DTCs are not output.	A
   DTCs are output.	B

Result: 

B 

REFER TO BRAKE CONTROL SYSTEM 

Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2015 - ] )

Result: 

A 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON (IG).
3. Turn the Techstream on.
4. Enter the following menus:
   1. for ABS/VSC/TRAC: Chassis / ABS/VSC/TRAC / Data List.
   2. for Combination Meter: Body Electrical / Combination Meter / Data List.
5. Check the values by referring to the table below.
   ABS/VSC/TRAC
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Vehicle Speed	Maximum wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations

   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Vehicle Speed Meter	Vehicle speed/Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)	Almost the same as actual vehicle speed	-

   Result

   Result	Proceed to
   The data list values of the ECUs match.	A
   The data list values of the ECUs do not match.	B

   HINT: 

   • When the Data List values of the ECUs match, an internal malfunction of the combination meter assembly is suspected.
   • When the Data List values of the ECUs do not match, a signal output error of the skid control ECU or an internal malfunction of the combination meter assembly is suspected.

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [11/2015 - ] )

Result: 

B 

See step  5

1. Replace the combination meter assembly with a new or a known good one (Refer to REMOVAL [11/2015 - ] ).

   Result

   Result	Proceed to
   The operation of the speedometer returns to normal.	A
   The operation of the speedometer does not return to normal.	B

Result: 

A 

END 

Result: 

B 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU) 

Refer to REMOVAL [11/2015 - ] )