Inspection Procedure

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

READ VALUE USING TECHSTREAM (REGULATOR CONTROL CURRENT)

Connect the Techstream to the DLC3.
Turn the ignition switch ON
Turn the tester on.
Select the following menus: Body Electrical / Main Body / Air Conditioner / Data List /
According to the display on the tester, read the "Data List".

DATA LIST / AIR CONDITIONER

DIAGNOSTIC NOTE AND MEASUREMENT ITEM / DISPLAY RANGE

Tester Display	Measurement Item/Range	Normal Condition
Regulator Control Current	Regulator control current / Min.: 0A Max.: 0.997 A	Value changes between 0 A and 0.997 A in accordance with compressor and pulley operation

OK: The display is as specified in the normal condition column.

Result

RESULT REFERENCE

Result	Proceed to
NG	A
OK (When troubleshooting according to PROBLEM SYMPTOMS TABLE )	B
OK (When troubleshooting according to the DTC)	C

B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C: REPLACE AIR CONDITIONING AMPLIFIER

A: GO TO NEXT STEP

INSPECT COMPRESSOR AND PULLEY

Disconnect the C8 compressor and pulley connector.

Measure the resistance.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
C8-1 - C8-2	10.1 to 11.1 Ω at 25°C (77°F)

Reconnect the compressor and pulley connector.

Fig 1: Identifying Compressor And Pulley Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE COMPRESSOR AND PULLEY (See REMOVAL )

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (COMPRESSOR AND PULLEY - AIR CONDITIONING AMPLIFIER)

Disconnect the C8 compressor and pulley connector.
Disconnect the E8 air conditioning amplifier connector.

Measure the resistance.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
C8-1 - E8-7 (SOL+)	Below 1 Ω
C8-1 - Body ground	10 kΩ or higher

Reconnect the compressor and pulley connector.
Reconnect the air conditioning amplifier connector.

Fig 2: Identifying C8 Compressor And Pulley Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (COMPRESSOR AND PULLEY - BODY GROUND)

Disconnect the C8 compressor and pulley connector.

Measure the resistance.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
C8-2 - Body ground	Below 1 Ω

Reconnect the compressor and pulley connector.

Fig 3: Identifying C8 Compressor And Pulley Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE AIR CONDITIONING AMPLIFIER