Lexus ES: Start Up Signal Circuit between Radio Receiver Assembly and Navigation ECU
DESCRIPTION
This circuit includes the navigation ECU and radio receiver assembly.
WIRING DIAGRAM
PROCEDURE
1. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU) |
(a) Disconnect the G1 radio receiver assembly connector.
(b) Disconnect the G14 navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
G1-7 (SUP) - G14-21 (SUP) | Always | Below 1 Ω |
G1-7 (SUP) or G14-21 (SUP) - Body ground | Always | 10 kΩ or higher |
NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the parking support brake system on. (d) Turn the Techstream on. (e) Enter the following menus: Body Electrical / Advanced Parking Guidance/ICS/Intuitive P/A / Trouble Codes. (f) Check for
DESCRIPTION Problem Symptom Suspected Area Trouble Area
Engine speed fluctuation due to abnormal combustion
Idle speed too low or high
Strong engine vibration due to above symptoms
Ignition malfunction
Deviation in air fuel ratio (Excessive or insufficient intake air volume
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