METER / GAUGE SYSTEM Tachometer Malfunction
| DTC Code | DTC Name |
|---|---|
| Tachometer Malfunction |
DESCRIPTION
In this circuit, the combination meter assembly receives engine speed signals from the ECM using the CAN communication line. The combination meter assembly displays the engine speed, which is calculated based on the data received from the ECM.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
When replacing the combination meter assembly, make sure to replace it with a new one.
PROCEDURE
CHECK CAN COMMUNICATION SYSTEM
Check if a CAN communication system DTC is output.
for LHD:Click hereClick hereClick here
for RHD:Click hereClick hereClick here
Result
Proceed to
CAN communication system DTC is not output
CAN communication system DTC is output (for LHD)
CAN communication system DTC is output (for RHD)
CHECK SFI SYSTEM OR ECD SYSTEM
*1: Engine Type Gasoline
*2: Engine Type Diesel
Check if a SFI system*1 or ECD system*2 DTC is output.
ECD system (1AD-FTV):
ECD system (2AD-FHV):
ECD system (2AD-FTV [for CCo]):
ECD system (2AD-FTV [for DPF]):Click here
SFI system (2AR-FE):Click here
SFI system (3ZR-FAE):Click here
SFI system (3ZF-FE):Click here
Powertrain > Engine and ECT > Trouble Codes
Result
Proceed to
DTC is not output
ECD system DTC is output (1AD-FTV)
ECD system DTC is output (2AD-FHV)
ECD system DTC is output (2AD-FTV [for CCo])
ECD system DTC is output (2AD-FTV [for DPF])
SFI system DTC is output (2AR-FE)
SFI system DTC is output (3ZR-FAE)
SFI system DTC is output (3ZR-FE)
PERFORM ACTIVE TEST USING GTS (TACHOMETER OPERATION)
Using the GTS, perform the Active Test.
Body Electrical > Combination Meter > Active Test
Tester Display
Measurement Item
Control Range
Diagnostic Note
TachoMeter Operation
Tachometer
OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000 or 7000 (rpm)
-
Body Electrical > Combination Meter > Active Test
Tester Display
TachoMeter Operation
OK
Tachometer indication is normal.
Result
Proceed to
OK
NG
READ VALUE USING GTS (ENGINE RPM, ENGINE SPEED)
Using the GTS, read the Data List.
Body Electrical > Combination Meter > Data List
Tester Display
Measurement Item
Range
Normal Condition
Diagnostic Note
Engine Rpm
Engine speed
Min.: 0 rpm, Max.: 12750 rpm
Actual engine speed
-
Powertrain > Engine and ECT
Tester Display
Measurement Item
Range
Normal Condition
Diagnostic Note
Engine Speed
Engine speed
Min.: 0 rpm, Max.: 16383 rpm
750 to 850 rpm: Idling with warm engine
-
Powertrain > Engine > Data List
Tester Display
Measurement Item
Range
Normal Condition
Diagnostic Note
Engine Speed
Engine speed
Min.: 0 rpm, Max.: 16383 rpm
750 to 850 rpm: Idling with warm engine
-
Body Electrical > Combination Meter > Data List
Tester Display
Engine Rpm
Powertrain > Engine and ECT > Data List
Tester Display
Engine Speed
Powertrain > Engine > Data List
Tester Display
Engine Speed
Tip:When the Data List values of the ECUs match, an internal malfunction of the ECM is suspected.
When the Data List values of the ECUs do not match, a signal output error of the ECM or an internal malfunction of the combination meter assembly is suspected.
Result
Proceed to
The Data List values of the ECUs do not match
The Data List values of the ECUs match
CHECK COMBINATION METER ASSEMBLY
Replace the combination meter assembly with a new or normally functioning one.
CHeck that the operation of the tachometer returns to normal.
OK
The operation of the tachometer returns to normal.
Result
Proceed to
OK
NG (1AD-FTV)
NG (2AD-FHV)
NG (2AD-FTV)
NG (2AR-FE)
NG (3ZR-FAE)
NG (3ZR-FE)
OK END (COMBINATION METER ASSEMBLY WAS DEFECTIVE)