Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BODY GROUND)

Remove the A/C amplifier
Disconnect the A/C amplifier connector.

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATIONS

Tester Connection	Condition	Specified Condition
J58-20 (GND) - Body ground	Always	Below 1 Ω

Fig 1: Identifying J58 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT A/C AMPLIFIER

Reconnect the A/C amplifier connector.

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATIONS

Tester Connection	Condition	Specified Condition
e1-2 (BUS G) - J58-20 (GND)	Always	Below 1 Ω

Fig 2: Identifying J58 And E1 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE A/C AMPLIFIER (See REMOVAL )

OK: Go to next step

INSPECT A/C AMPLIFIER

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

Standard Voltage

STANDARD VOLTAGE SPECIFICATIONS

Tester Connection	Condition	Specified Condition
e1-4 (BBUS) - e1-2 (BUS G)	Engine switch off	Below 1 V
e1-4 (BBUS) - e1-2 (BUS G)	Engine switch on (IG)	11 to 14 V

Fig 3: Identifying E1 Connector Terminals

NG: REPLACE A/C AMPLIFIER (See REMOVAL )

OK: REPLACE AIR CONDITIONING HARNESS (See DISASSEMBLY )