Toyota Sienna Service Manual: Terminals of ECU
1. POSITION CONTROL ECU AND SWITCH ASSEMBLY (POWER SEAT CONTROL SWITCH AND ECU)
- Disconnect the P58 and P59 connectors.
- Check the voltage of each terminal of the wire harness side connectors.
If the result is not as specified, there may be a malfunction in the wire harness side.
- Check the resistance of each terminal of the wire harness side connectors.
If the result is not as specified, there may be a malfunction in the wire harness side.
- Reconnect the P58 and P59 connectors.
- Check the voltage of each terminal of the connectors.
If the result is not as specified, the position control ECU and switch assembly may be malfunctioning.
2. OUTER MIRROR CONTROL ECU LH
- Disconnect the outer mirror control ECU LH connector.
- Check the voltage of each terminal of the wire harness side connectors.
If the result is not as specified, there may be a malfunction in the wire harness side.
- Check the resistance of each terminal of the wire harness side connector.
If the result is not as specified, there may be a malfunction in the wire harness side.
- Reconnect the outer mirror control ECU LH connector.
- Check the voltage of each terminal of the connectors.
If the result is not as specified, the outer mirror control ECU LH may be malfunctioning.
Problem symptoms table
HINT:
Inspect the fuse and relay before confirming the suspected
areas in the table below.
Inspect each suspected area in numerical order for the
corresponding symptom.
If the ...
Diagnosis system
1. DESCRIPTION
Front power seat control system data can be read
through the Data Link Connector 3 (DLC3) of the
vehicle. When the system seems to be
malfunctioning, use the intelligent ...
Other materials:
Operation check
1. REMOVE CHECK FUNCTION
Check that the key reminder warning buzzer
sounds.
With the driver side door closed, insert the key
into the ignition key cylinder and then turn the
key to LOCK or ACC.
Check that the buzzer sounds intermittently if
the driver side door ...
On-vehicle inspection
1. CHECK RADIATOR RESERVOIR CAP SUBASSEMBLY
a) Measure the valve opening pressure.
(1) If there are water stains or foreign matter on
rubber packings 1, 2 or 3, clean the part(s) with
water and finger scouring.
(2) Check that rubber packings 1, 2 and 3 are not
deformed, cracked or swol ...
Mass air flow meter
COMPONENTS
ON-VEHICLE INSPECTION
1. INSPECT MASS AIR FLOW METER
NOTICE:
Perform the mass air flow (MAF) meter inspection
by following the procedures below.
Only replace the MAF meter when the MAF value
in the DATA LIST (with the engine stopped) are
not within th ...
