A02037
ON
ON
Brake Pedal
Depressed
Brake Pedal
Released
STP (+)
-
DIAGNOSTICS
ENGINE
DI-133
287
Author:
Date:
2001 SIENNA (RM787U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc.
at the time of the malfunction.
1
Check operation of stop light.
CHECK:
Check if the stop lights go on and off normally when the brake pedal is operated and released.
NG
Check and repair stop light circuit.
OK
2
Check STP signal.
When using TOYOTA hand-held tester:
PREPARATION:
(a)
Connect the TOYOTA hand-held tester to the DLC3.
(b)
Turn the ignition switch ON and push the TOYOTA hand-
held tester main switch ON.
CHECK:
Read the STP signal on the TOYOTA hand-held tester.
OK:
Brake pedal is depressed: STP ...... ON
Brake pedal is released: STP ...... OFF
When not using TOYOTA hand-held tester:
PREPARATION:
Turn the ignition switch ON.
CHECK:
Check voltage between terminal STP of the ECM connector
and body ground.
OK:
Brake pedal
Voltage
Depressed
7.5
∼
14 V
Released
Below 1.5 V
OK
Check for intermittent problems
(See page
).
NG
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