Speedometer Malfunction [02/2024 - ]: Procedure

1. Check if CAN communication DTCs are output.

   Refer to DIAGNOSIS SYSTEM [02/2024 - ]

   Result

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

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2024 - ] 

Result: 

A 

See step  2

1. Check for DTCs electronically controlled brake system are output.

   Chassis > Brake/EPB > Trouble Codes 

   Result

   Result	Proceed to
   Electronically controlled brake system DTCs are not output.	A
   Electronically controlled brake system DTC is output.	B

Result: 

B 

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [02/2024 - ] 

Result: 

A 

See step  3

1. Using the GTS, read the Data List.

   Chassis > Brake/EPB > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Vehicle Speed	Vehicle speed (Vehicle speed signal output to combination meter assembly)	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0 mph)	When driving at constant speed: No large fluctuations

   Chassis > Brake/EPB > Data List 

   Tester Display
   Vehicle Speed

   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 brake actuator assembly (No. 2 skid control ECU) or an internal malfunction of the combination meter assembly is suspected.

   OK

   Vehicle speed value displayed on the GTS is almost the same as the speedometer indication.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2024 - ] 

Result: 

NG 

See step  4

1. Using the GTS, read the Data List.

   Body Electrical > Combination Meter > Data List 

   Tester Display	Measurement Item	Range	Reference Value	Diagnostic Note
   Vehicle Speed Meter	Vehicle speed	Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)	Almost same as actual vehicle speed	The value displayed on the speedometer may deviate.

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Vehicle Speed Meter

   Chassis > Brake/EPB > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Vehicle Speed	Vehicle speed (Vehicle speed signal output to combination meter assembly)	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0 mph)	When driving at constant speed: No large fluctuations

   Chassis > Brake/EPB > Data List 

   Tester Display
   Vehicle Speed

   HINT: 

   • When the Data List values of the ECUs match, an internal malfunction of the brake actuator assembly (No. 2 skid control ECU) is suspected.
   • When the Data List values of the ECUs do not match, an internal malfunction of the combination meter assembly is suspected.

   OK

   The Data List values of the ECUs do match.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY (NO. 2 SKID CONTROL ECU). Refer to  REMOVAL [02/2024 - ] 

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [02/2024 - ]