Inspection Procedure

INSPECT STEREO COMPONENT AMPLIFIER

Measure the voltage according to the value(s) in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
E34-1 (MUTE) - Body ground	Ignition switch ACC, Audio system is playing → Changing sources	Above 3.5 V → Below 1 V

Fig 1: Identifying E34 Stereo Component Amplifier Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)

Disconnect the radio receiver connector and the stereo component amplifier connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
E40-7 (MUTE) - E34-1 (MUTE)	Always	Below 1 Ω
E40-7 (MUTE) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying E40 Radio Receiver And E34 Stereo Component Amplifier Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT STEREO COMPONENT AMPLIFIER (OUTPUT SIGNAL)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

VOLTAGE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
E40-7 (MUTE) - Body ground	Ignition switch ACC, Audio system is playing.	Above 3.5 V

Fig 3: Identifying E40 Radio Receiver Connector

NG: REPLACE STEREO COMPONENT AMPLIFIER (See REMOVAL )

OK: REPLACE RADIO RECEIVER (See REMOVAL )