Speedometer Malfunction

METER: METER / GAUGE SYSTEM (for Sedan): Speedometer Malfunction

Speedometer Malfunction

DESCRIPTION

The combination meter assembly controls the speedometer in accordance with vehicle speed signals from the speedometer sensor.

WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: If DTC U0129 has been stored, troubleshoot the CAN communication system first.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SPEED METER)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON and turn the tester ON.
(c) Enter the following menus : Body Electrical / Combination Meter / Active Test.
Body Electrical / Combination Meter / Active Test::






OK:
Vehicle speed displayed on the tester is approximately the same as that of the speedometer reading.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (SPEED METER)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON and the tester ON.
(c) Select the item below from the Data List, and read the value displayed on the Techstream.
Body Electrical / Combination Meter / Data List::






OK:
Vehicle speed displayed on the tester is approximately the same as the actual vehicle speed.
NG -- INSPECT SPEEDOMETER SENSOR
OK -- USE SIMULATION METHOD TO CHECK
3. INSPECT SPEEDOMETER SENSOR




(a) Remove the speedometer sensor.
(b) Connect the positive (+) lead from the battery to terminal 1 and the negative(-) lead to terminal 2.
(c) Connect the positive (+) lead from the tester to terminal 3 and the negative (-) lead to terminal 2.
(d) Rotate the shaft.
(e) Check that the voltage output between terminals 2 and 3 varies between 0V and 11V.
(f) Reinstall the speedometer sensor.
NG -- REPLACE SPEEDOMETER SENSOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (SPEEDOMETER SENSOR - COMBINATION METER ASSEMBLY)




(a) Disconnect the D1 combination meter assembly connector.
(b) Disconnect the C21 speedometer sensor connector.
(c) Measure the resistance
Standard resistance:





(d) Reconnect the combination meter assembly connector.
(e) Measure the voltage
Standard voltage:





(f) Reconnect the combination meter assembly and speedometer sensor connectors.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE COMBINATION METER ASSEMBLY