Toyota Sienna Service Manual: Vehicle Speed Sensor Malfunction
DTC P0500 Vehicle Speed Sensor Malfunction
DTC P0503 Vehicle Speed Sensor "A" Intermittent / Erratic / High
DESCRIPTION The cruise control system uses the same vehicle speed signal that is sent to the ECM for the SFI system.
If DTC P0500 is detected, perform the diagnosis using the inspection procedure for DTC P0500 in the SFI system. The speed signal is converted for use by the cruise control inside the ECM.
Both the SFI system and the cruise control system can set DTC P0500, however the detection conditions of the two systems are different.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|
P0500 |
The vehicle speed signal from the vehicle speed sensor is cut for 0.14 sec. or more while cruise control is in operation |
|
|
P0503 |
Momentary interruption and noise are detected when a rapid change of vehicle speed occurs while cruise control is in operation |
|
WIRING DIAGRAM
Refer to DTC P0500
INSPECTION PROCEDURE
Refer to DTC P0500
Diagnostic trouble code chart
If a trouble code is displayed during the DTC check, check
the trouble areas listed for that code in the table below and
proceed to the appropriate page.
Dynamic Laser Cruise Control System:
...
Brake Switch "A" Circuit
DTC P0571 Brake Switch "A" Circuit
DESCRIPTION
When the brake pedal is depressed, the stop light switch sends a signal to
the ECM. When the ECM
receives this signal, it cancels the crui ...
Other materials:
Disassembly
1. REMOVE RH SEAT REAR SEAT RECLINING COVER
Remove the 2 screws.
Remove the RH seat rear seat reclining cover by
pulling it out in the arrow mark direction shown in
the illustration.
2. REMOVE LH SEAT REAR SEAT RECLINING COVER
Remove the 2 screws.
R ...
Laser Sensor Power Source Circuit
DESCRIPTION
This circuit provides power to the laser sensor. The laser sensor emits radio
waves towards an object in
front and measures the distance and direction of the object by receiving the
beam reflections. Based on
the reflections, the sensor calculates the difference in speed between t ...
Short to B+ in Driver Side Squib 2nd Step Circuit
DTC B1183/22 Short to B+ in Driver Side Squib 2nd Step Circuit
DESCRIPTION
The driver side squib 2nd step circuit consists of the center airbag sensor
assembly, the spiral cable and
the steering pad.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1183/22 ...
