Toyota Sienna Service Manual: Ignition system

Engine

Ignition coil and spark plug

Other materials:

Disassembly
1. REMOVE NO. 1ULTRASONIC SENSOR RETAINER (w/ Clearance Sonar System) (See page PM-19) 2. REMOVE NO. 1 ULTRASONIC SENSOR (w/ Clearance Sonar System) (See page PM-19) 3. REMOVE REAR BUMPER ENERGY ABSORBER 4. REMOVE REAR BUMPER BAR PLATE Remove the 4 clips and the rear bumper bar plate. 5. ...

On-vehicle inspection
1. INSPECT MASS AIR FLOW METE 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 the normal operating range or there is fore ...

Intake Air Temperature Sensor Gradient Too High
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 thermistor with a resistance that varies according to the temperature of the intake air. When the IAT becomes low, the resistance of the the ...