Toyota Sienna Service Manual: Electronic circuit inspection procedure

General information

A large number of ECU controlled systems are used in the SIENNA. In general, ECU controlled systems are considered to be very intricate, requiring a high level of technical knowledge to troubleshoo ...

Basic inspection

(a) WHEN MEASURING RESISTANCE OF ELECTRONIC PARTS (1) Unless otherwise stated, all resistance measurements should be made at an ambient temperature of 20°C (68°F). Resistance measurements may b ...

Other materials:

Scratched / Reversed Disc
DTC 62-46 Scratched / Reversed Disc DTC 63-46 Scratched / Reversed Disc DESCRIPTION DTC No. DTC Detecting Condition Trouble Area 62-46 Scratches or dirt is found on CD surface or CD is set upside down. CD Radio receiver ...

Diagnosis system
1. CHECK DLC3  The vehicle's ECU uses ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format. NOTICE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not ...

Intake Air Temperature Circuit/ Intake Air Temperature Circuit Low Input/ Intake Air Temperature Circuit High Input
DTC P0110 Intake Air Temperature Circuit DTC P0112 Intake Air Temperature Circuit Low Input DTC P0113 Intake Air Temperature Circuit High Input DESCRIPTION The Intake Air Temperature (IAT) sensor, mounted on the Mass Air Flow (MAF) meter, monitors the IAT. The IAT sensor has a built-in ther ...