Component Tests and General Diagnostics

INSPECTION







1. INSPECT CD AUTO CHANGER CIRCUIT
Disconnect connectors from CD auto changer and inspect the connector on the wire harness side.
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(3), CDL+(2), CDL-(7), CDR+(1), CDR-(6), TXM-(9) and TX+(4) terminals are serial signals, they cannot ordinarily be measured with a tester.







2. PIONEER made:
INSPECT POWER AMPLIFIER CIRCUIT
Disconnect the connector from power amplifier and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.







3. MARK LEVINSON made:
INSPECT POWER AMPLIFIER CIRCUIT
Disconnect the connector from power amplifier and inspect the connector on the wire harness side.
If the circuit is not as specified, Inspect the circuits connected to other parts.







4. INSPECT RADIO RECEIVER ASSEMBLY CIRCUIT
Disconnect the connectors from the radio receiver assembly, and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.

HINT: Check the wire harness between radio receiver assembly and the CD auto changer, between radio receiver assembly and power amplifier.







5. INSPECT RADIO RECEIVER ASSEMBLY CIRCUIT
Disconnect the connectors from the radio receiver assembly, and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other pants.

HINT: Check the wire harness between radio receiver assembly and the CD auto changer, between radio receiver assembly and power amplifier.







6. INSPECT GATEWAY ECU CIRCUIT
Disconnect the connectors from the gateway ECU, and inspect the connector on the wire harness side.
If the circuit is not as specified, inspect the circuits connected to other parts.

HINT: Check the wire harness between radio receiver assembly and the gateway ECU.