Speedometer Malfunction

METER: METER / GAUGE SYSTEM: Speedometer Malfunction
- Speedometer Malfunction

DESCRIPTION

The meter ECU receives vehicle speed signals from the skid control ECU via the CAN communication lines. The vehicle speed sensor detects the voltage that varies according to the vehicle speed. The skid control ECU supplies power to the vehicle speed sensor. The skid control ECU detects vehicle speed signals based on the pules of the voltage.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Connect a Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream on.

(c) Check for DTCs and note any codes that are output Reading and Clearing Diagnostic Trouble Codes.

(d) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(e) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART Meter / Gauge System
A -- Continue to next step.

2. CONFIRM DTC OUTPUT (BRAKE CONTROL SYSTEM)

(a) Connect a Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream on.

(c) Check for DTCs and note any codes that are output Reading and Clearing Diagnostic Trouble Codes.

(d) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(e) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART Vehicle Stability Control System
A -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM (SPEED METER)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Combination Meter





OK:

Vehicle speed displayed on the tester is approximately the same as that of the speedometer reading.

NG -- REPLACE COMBINATION METER ASSEMBLY Removal
OK -- Continue to next step.

4. READ VALUE USING TECHSTREAM (SPEED METER)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) According to the display on the Techstream, read the Data List.

Combination Meter





OK:

Vehicle speed displayed on the tester is approximately the same as the actual vehicle speed

NOTICE:
Determine whether the value displayed on the tester is within the acceptable range by referring to reference values described in "ON-VEHICLE INSPECTION" On-Vehicle Inspection.

NG -- REPLACE COMBINATION METER ASSEMBLY

OK -- USE SIMULATION METHOD TO CHECK Electronic Circuit Inspection Procedure

5. REPLACE COMBINATION METER ASSEMBLY

(a) Replace the combination meter assembly with a new or normal one Removal.

OK:

The operation of the speedometer returns to normal.

NG -- REPLACE ABS AND TRACTION ACTUATOR (SKID CONTROL ECU) Removal

OK -- END