Toyota Sienna Service Manual: Headlight relay

Back door courtesy switch

INSPECTION 1. BACK DOOR LOCK ASSEMBLY (WITH OUT POWER BACK DOOR)  Inspect back door courtesy light switch operation.  Check that there is resistance between the terminal 5 a ...

Daytime running light relay

ON-VEHICLE INSPECTION 1. RUNNING LIGHT RELAY  Inspect relay resistance. Resistance ...

Other materials:

Terminals of ECU
1. CHECK TRANSPONDER KEY AMPLIFIER Disconnect the I14 amplifier connector and measure the resistance between the terminal of the wire harness side connector and body ground. If the result is not as specified, there may be a malfunction on the wire harness side.  Reconnec ...

TC and CG Terminal Circuit
DESCRIPTION Connecting terminals TC and CG of the DLC3 causes the system to enter the self-diagnostic mode. If a malfunction is present, DTCs will be output. HINT: When a particular warning light remains blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal grou ...

Cleaning and protecting the vehicle exterior
Perform the following to protect the vehicle and maintain it in prime condition: Working from top to bottom, liberally apply water to the vehicle body, wheel wells and underside of the vehicle to remove any dirt and dust. Wash the vehicle body using a sponge or soft cloth, such as a cha ...