Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (RADIO NO. 2, AM1)
1. Remove the RADIO NO. 2 fuse from the passenger side junction block.
2. Remove the AM 1 fuse from the driver side junction block.
3. Measure the resistance of the fuses.
  Standard resistance: Below 1 Ω
NG: REPLACE FUSE

OK: Go to next step.

INSPECT RELAY (Marking: ACC)

Remove the ACC relay from the passenger side junction block.

Measure the resistance of the relay.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

Fig 1: Inspecting Relay (IG2 Relay)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY (ACC)

OK: Go to next step.

CHECK WIRE HARNESS (A/C AMPLIFIER - BATTERY)

Disconnect the A10 amplifier connector.

Fig 2: Identifying A10 Amplifier Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the wire harness side connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
A10-9 (ACC) - Body ground	Ignition switch ACC	10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOM TABLE