Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 eg cip0500
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DI-97
DIAGNOSTICS - ENGINE
DI22D-03
DTC P0500 Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION
The speed sensor for ABS detects the wheel speed and sends the appropriate signals to the ABS ECU.
The ECU converts these signals in to a 4-pulse signal and outputs it to the combination meter.
After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit in-
side the combination meter, it is then transmitted to the ECM. The ECM determines the vehicle speed based
on the frequency of these pulse signals.
4-pulse 4-pulse
From ECM
ABS ECU
Speed Sensor
Multi Display
A00022
DTC No. DTC Detecting Condition Trouble Area
No vehicle speed sensor signal to Engine & ECT ECU under S Combination meter
P0500/61 th following conditions: (2 trip detection logic)
the f ll i g diti ( t i d t ti l gi ) SO h t in d i it
Open or short i speed sensor circuit
Vehicle is being driven S ECM
WIRING DIAGRAM
ECM
Combination Meter 5V
J/B No.3
11 13 18 22 SPD
V-Y V-Y
C10 3D 3C E9
A11086
2001 SIENNA (RM787U)
Author : Date : 251
DI-98
DIAGNOSTICS - ENGINE
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 speedometer.
CHECK:
Drive the vehicle and check if the operation of the speedometer in the combination meter is normal.
HINT:
The vehicle speed sensor is operating normally if the speedmeter display is normal.
NG Check speedmeter circuit.
OK
2 Check for short in harness and connector between terminal SPD of ECM and
body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF-83 ).
(b) Disconnect the E9 connector of ECM.
CHECK:
Check continuity between terminal SPD of ECM and body
ground.
E9
OK:
SPD No continuity (1 M or higher)
A02030
NG Repair or replace harness or connector.
OK
2001 SIENNA (RM787U)
Author : Date : 252
DI-99
DIAGNOSTICS - ENGINE
3 Check voltage between terminal SPD of ECM connector and body ground.
ON PREPARATION:
(a) Turn the ignition switch ON.
(b) Disconnect the E9 connector of ECM.
CHECK:
Measure voltage between terminal SPD of the ECM connector
and body ground.
E9 OK:
SPD (+) Voltage: 9 - 14 V
A02029
NG Check for open in harness and connector
between junction connector (J/B No.3) and ECM
(See page IN-31 ).
OK
4 Check for open in harness and connector between J/B No.3 and
combination meter (See page IN-31 ).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN-31 ).
2001 SIENNA (RM787U)
Author : Date : 253
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