IG Signal Circuit

HEATING / AIR CONDITIONING: SOLAR VENTILATION SYSTEM: IG Signal Circuit
- IG Signal Circuit

DESCRIPTION

The solar ventilation system activates when the vehicle power switch is off. If the solar ventilation switch has been turned on, the solar ventilation ECU checks that the vehicle power switch is off and then activates the solar ventilation system.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT
Before performing this inspection procedure, check if the Data List items for the solar ventilation system are displayed. If the Data List items are not displayed, inspect the communication circuit between the solar ventilation ECU and A/C amplifier Communication Circuit Between Solar Ventilation ECU And A/C Amplifier.

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Data List.

(e) Check the value(s) by referring to the table below.

Air Conditioner





OK:

The display is as specified in the Normal Condition column.

Result:





B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Solar Ventilation System

C -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Air Conditioning System
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (SOLAR VENTILATION ECU - BATTERY)

(a) Disconnect the solar ventilation ECU connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SOLAR VENTILATION ECU Removal