Toyota 2GR-FE Manual page 932

ST–70
6
INSPECT MAIN BODY ECU (SPEED SIGNAL)
Main Body ECU
OK
REPLACE MAIN BODY ECU
ST
2GR-FE STARTING – SMART KEY SYSTEM
(a) Check the input signal waveform.
(1) Reconnect the connectors.
(2) Remove the combination meter assembly with the
(3) Connect an oscilloscope to terminal E8-9 (SPD) and
E8
(4) Turn the engine switch on (IG).
(5) Turn the wheel slowly.
SPD
B137984E01
(6) Check the signal waveform according to the
GND
I042329E01
NG
connector(s) still connected.
body ground.
condition(s) in the table below.
Item
Tool setting
Vehicle condition Driving at approx. 20 km/h (12 mph)
OK:
The waveform is displayed as shown in the
illustration.
HINT:
As the vehicle speed increases, the cycle of the
signal waveform narrows.
REPLACE COMBINATION METER
Condition
5 V/DIV., 10 ms./DIV.