Toyota Sienna Service Manual: Problem symptoms table
If there are no DTCs output but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.
NOTICE: When replacing the brake actuator assembly, sensor, etc., turn the ignition switch off.
HINT: Inspect the fuse and relay before investigating the suspected areas as shown in the table below. Inspect each malfunction circuit in numerical order for the corresponding symptom.
Anti-lock brake system:
Terminals of ecu
Test mode procedure
1. SPEED SENSOR SIGNAL CHECK (WHEN USING SST CHECK WIRE):
HINT:
If the ignition switch is turned from the ON to the ACC
or LOCK position during Test Mode, the DTCs of the
signal check functio ...
Diagnosis system
1. DESCRIPTION
(a) Release the parking brake pedal.
(b) Check the warning lights.
When ignition switch is turned ON, check that the
ABS warning light and brake warning light come on
for 3 ...
Other materials:
Inspection
1. INSPECT OIL PUMP RELIEF VALVE
(a) Coat the relief valve with engine oil and check that it
falls smoothly into the valve hole under its own
weight.
If the valve does not fall smoothly, replace the relief
valve. If necessary, replace the oil pump assembly.
2. INSPECT OIL PUMP ROTOR SET
...
Inspection
1. INSPECT INVERTER MAIN SWITCH
Inspect the continuity between terminal at the each
switch position shown in the chart.
If continuity is not as specified, replace the main
switch assembly.
Inspect the bulb state when connecting the battery
to each terminal
...
Precaution
1. HANDLING PRECAUTIONS ON STEERING SYSTEM
(a) Be careful to replace the parts properly because
they could affect the performance of the steering
system and result in a driving hazard.
2. HANDLING PRECAUTIONS ON SRS AIRBAG
SYSTEM
(a) The SIENNA is equipped with SRS (Supplemental
Restraint Sys ...
