Audio System (W/LEXUS Navigation System): Inspection
- INSPECT CD AUTO CHANGER CIRCUIT
Disconnect connectors from CD auto changer and inspect the connector on the wire harness side.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECTING CD AUTO CHANGER CIRCUITSTester connection Condition Specified condition 8 - Ground Constant Continuity 12 - Ground Ignition switch LOCK No voltage 12 - Ground Ignition switch ACC or ON Battery positive voltage 5 - Ground Constant Battery positive voltage If the circuit is not as specified, inspect the circuits connected to other parts.
HINT:
- Check the wire harness between the radio receiver assembly and the CD auto changer.
- Since the signals to and from the MUTE, R-, R+, L-, L+, TX- and TX+ terminals are serial signals, they cannot ordinarily be measured with a tester.
- INSPECT POWER AMPLIFIER CIRCUIT
Disconnect the connector from power amplifier and inspect the connector on the wire harness side.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECTING POWER AMPLIFIER CIRCUITSTester connection Condition Specified condition A6 - Ground Constant Continuity A3 - Ground Ignition switch LOCK and radio switch ON No voltage A3 - Ground Ignition switch ACC or ON and radio switch ON Battery positive voltage A4 - Ground Constant Battery positive voltage If the circuit is not as specified, inspect the circuits connected to other parts.
- INSPECT RADIO RECEIVER ASSEMBLY CIRCUIT
Disconnect the connectors from the radio receiver assembly, and inspect the connector on the wire harness side.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECTING RADIO RECEIVER ASSEMBLY CIRCUITSTester connection Condition Specified condition A2 - Ground Constant Continuity A4 - Ground Constant Battery positive voltage A1 - Ground Ignition switch LOCK No voltage A1 - Ground Ignition switch ACC or ON Battery positive voltage HINT:
Check the wire harness between radio receiver assembly and the CD auto changer, between radio receiver assembly and power amplifier.