Toyota RAV4 manuals

Toyota Sienna Service Manual: Ignition Switch Circuit

DESCRIPTION

The Multiplex network body ECU receives the ACC and IG signals from the ignition switch.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to DLC3.
  2.  Turn the ignition switch ON and push the intelligent tester main switch ON.
  3.  Select the items below in the DATA LIST, and read the displays on the intelligent tester.

BODY NO.1:

BODY NO.1

2 INSPECT FUSE

  1. Inspect the ECU ACC fuse, ECU-IG fuse and AM1 fuse in instrument panel junction block assembly.

3 INSPECT RELAY

INSPECT RELAY

  1. Inspect ACC relay continuity.

Resistance

Resistance

INSPECT RELAY

  1. Inspect IG1 relay continuity.

Resistance

Resistance

4 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC, IG)

  1. Measure the voltage between the terminals as shown in the chart below.

Voltage

Voltage

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC, IG)

5 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (+B)

  1. Measure voltage between the terminal 1A-1 of the instrument panel junction block assembly and body ground.

Voltage

Voltage

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (+B)

6 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  1. Measure voltage between the terminal 1H-10 of the instrument panel junction block assembly and body ground.

Voltage

Voltage

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Light Sensor Circuit Malfunction
DTC B1244 Light Sensor Circuit Malfunction DESCRIPTION This DTC is output when failure in the light sensor circuit is detected. DTC No. DTC Detection Condition Trouble Area ...

Headlight Relay Circuit
DESCRIPTION The Multiplex network body ECU controls HEAD relay when signal is received from headlight dimmer switch assembly. WIRING DIAGRAM INSPECTION PROCEDURE 1 PERFORM ACTIVE TEST BY IN ...

Other materials:

Disassembly
1. REMOVE SIDE DEFROSTER NOZZLE DUCT NO.1 (a) Remove the 2 screws <C> and defroster nozzle duct No. 1. 2. REMOVE SIDE DEFROSTER NOZZLE DUCT NO.2 (a) Remove the 2 screws <C> and defroster nozzle duct No. 2. 3. REMOVE DEFROSTER NOZZLE ASSEMBLY (a) Remove the 4 screws <C> and d ...

Crankshaft Position Sensor
DESCRIPTION The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a pickup coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and a magnet. The sensor plate rotates as each tooth passes through the pi ...

VC Output Circuit
DESCRIPTION The ECM constantly uses 5 V from the battery voltages supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit. When the VC circuit is short-circuited, the microprocessor in the ECM and sens ...

© 2011-2025 Copyright www.tsienna.net