Toyota Camry (XV70): Start Up Signal Circuit between Radio Receiver Assembly and Navigation ECU
Toyota Camry Repair Manual XV70 (2018-2024) / Audio, Visual, Telematics / Navigation / Multi Info Display / Navigation System / Start Up Signal Circuit between Radio Receiver Assembly and Navigation ECU
DESCRIPTION
This circuit includes the navigation ECU and radio and display receiver assembly.
WIRING DIAGRAM
PROCEDURE
| 1. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU) |
(a) Disconnect the K1 radio and display receiver assembly connector.
(b) Disconnect the K17 navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
K1-7 (SUP) - K17-21 (SUP) |
Always | Below 1 Ω |
|
K1-7 (SUP) or K17-21 (SUP) - Body ground |
Always | 10 kΩ or higher |
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
.gif)
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Voice Guidance Circuit between Radio Receiver and Stereo Component Amplifier
DESCRIPTION Using this circuit, the radio and display receiver assembly sends signals to the stereo component amplifier assembly. WIRING DIAGRAM
PROCEDURE
1.
CHECK HARNESS AND CONNECTOR
Microphone Circuit
DESCRIPTION
w/o Manual (SOS) Switch:
The radio and display receiver assembly, roof console box sub-assembly and telephone microphone assembly are connected to each other using the microphone co
Radio Receiver Power Source Circuit
DESCRIPTION This is the power source circuit to operate the radio and display receiver assembly. WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE: Inspect the fuses for circuits related to this syst
SEE MORE:
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE
1. INSPECT FUEL CUT OPERATION (a) Start the engine. (b) Warm up the engine.
(c) Increase the engine speed to approximately 3500 rpm. (d) Use a sound scope to check for fuel injector assembly operating sounds.
(e) When the accelerator pedal is fully released, che
Torque Sensor Zero Point Adjustment Undone (C1515)
DESCRIPTION This DTC does not indicate a malfunction. The power steering ECU (rack and pinion power steering gear assembly) stores this DTC when it determines that torque sensor zero point calibration has not been performed.
When the IG terminal voltage is below 8 V, torque sensor zero point cali
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