Tachometer Malfunction

METER: METER / GAUGE SYSTEM: Tachometer Malfunction

Tachometer Malfunction

DESCRIPTION

The combination meter assembly controls the tachometer in accordance with engine speed signals from the ECM through the CAN communication system.

WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: If DTC U0100 has been stored, troubleshoot the CAN communication system first.

PROCEDURE

1. CONFIRM DTC OUTPUT (ECM)
(a) Check DTCs .
Result:






B -- GO TO DTC P0335
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER OR TECHSTREAM (TACHOMETER)
(a) Connect an intelligent tester or a Techstream to the DLC3.
(b) Turn the ignition switch on (IG) and turn the tester on.
(c) Operate the intelligent tester or Techstream according to the display and select "ACTIVE TEST" or "Active Test" Meter / Gauge System.
(1) Intelligent tester
Body / Combination Meter / ACTIVE TEST::






(2) Techstream
Body Electrical / Combination meter / Active Test::






OK:
Engine speed displayed on the tester is approximately the same as that of the tachometer reading.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
3. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (TACHOMETER)
(a) Connect an intelligent tester or a Techstream to the DLC3.
(b) Engine start and turn the tester on.
(c) Operate the intelligent tester or Techstream according to the display and select "DATA LIST" or "Data List" Meter / Gauge System.
(1) Intelligent tester
Body / Combination Meter / DATA LIST::






(2) Techstream
Body Electrical / Combination Meter / Data List::






OK:
Engine speed displayed on the tester is approximately the same as that displayed on the combination meter.
NOTE: Determine whether the value displayed on the tester is within the acceptable range by referring to reference values described in "ON-VEHICLE INSPECTION" Meter / Gauge System.

NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- USE SIMULATION METHOD TO CHECK