Inspection Procedure

CHECK FUSE (RR-IG1-3, D S/HTR, D-IG1-3)

Remove the RR-IG1-3 fuse from the luggage room junction block.
Remove the D S/HTR and D-IG1-3 fuses from the main body ECU.

Measure the resistance of the fuses.

Standard resistance

FUSE (RR-IG1-3, D S/HTR, D-IG1-3)

Tester Connector	Condition	Specified Condition
RR-IG1-3fuse	Always	Below 1 Ω
D S/HTR fuse	Always	Below 1 Ω
D-IG1-3 fuse	Always	Below 1 Ω

NG: REPLACE FUSE

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - BATTERY AND BODY GROUND)

Fig 1: Identifying e34 ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the e34 ECU connector.

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

Standard resistance

SEAT CLIMATE CONTROL ECU - BATTERY AND BODY GROUND RESISTANCE

Tester Connector	Condition	Specified Condition
e34-12 (GND) - Body ground	Always	Below 1 Ω

Measure the voltage of the wire harness side connector.

Standard voltage

SEAT CLIMATE CONTROL ECU - BATTERY AND BODY GROUND VOLTAGE

Tester Connector	Switch Condition	Specified Condition
e34-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
e34-2 (SYSB) - Body ground	Always	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (SEAT CLIMATE SWITCH LH - BATTERY AND BODY GROUND)

Fig 2: Identifying L67 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the L67 switch connector.

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

Standard resistance

SEAT CLIMATE SWITCH LH - BATTERY AND BODY GROUND RESISTANCE

Tester Connector	Condition	Specified Condition
L67-2 (E) - Body ground	Always	Below 1 Ω

Measure the voltage of the wire harness side connector.

Standard voltage

SEAT CLIMATE SWITCH LH - BATTERY AND BODY GROUND VOLTAGE

Tester Connector	Switch Condition	Specified Condition
L67-7 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

INSPECT CLIMATE CONTROL SWITCH LH

Fig 3: Identifying L67 Switch Connector Terminals

Remove the L67 switch connector.

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

Standard resistance

CLIMATE CONTROL SWITCH LH

Tester Connector	Switch Condition	Specified Condition
5 (V5L) - 4 (VSL)	Cooler MAX --> Heater MAX	Below 1 Ω --> 5 kΩ

NG: REPLACE CLIMATE CONTROL SWITCH LH (See REMOVAL )

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (SEAT CLIMATE CONTROL ECU - SEAT CLIMATE SWITCH LH AND BODY GROUND)

Fig 4: Identifying e34 And L67 Connectors Terminals

Disconnect the e34 ECU connector.
Disconnect the L67 switch connector.

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

Standard resistance

SEAT CLIMATE CONTROL ECU - SEAT CLIMATE SWITCH LH AND BODY GROUND

Tester Connector	Condition	Specified Condition
e34-14 (V5) - L67-5 (V5L)	Always	Below 1 Ω
e34-18 (VS) - L67-4 (VSL)	Always	Below 1 Ω
e34-15 (VG) - L67-3 (VGL)	Always	Below 1 Ω
e34-14 (V5) - Body ground	Always	10 kΩ or higher
e34-18 (VS) - Body ground	Always	10 kΩ or higher
e34-15 (VG) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE SEAT CLIMATE CONTROL ECU (See REMOVAL )