2003 LEXUS LS430 Identifying ac

Fig. 60: Identifying Seat Climate Control Blower Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: REPLACE SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU)
4.CHECK WIRE HARNESS (PASSENGER SIDE J/B - BATTERY)
a. Disconnect the PJ J/B connector.
b. Measure the voltage of the J/B connector.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
Tester ConnectionSpecified Condition
C20-8 (E) - Body groundBelow 1 ohms

Fig. 61: Identifying PJ Passenger Side J/B Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: Go to step 5
OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (PASSENGER SIDE J/B -
CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU))
5.CHECK WIRE HARNESS (PASSENGER SIDE J/B - BODY GROUND
a. Disconnect the PA and PE J/B connectors.
b. Measure the voltage of the wire harness side connectors.
Tester ConnectionConditionSpecified Condition
PJ-9 - Body groundIgnition switch ON10 to 14 V

Fig. 62: Identifying PA And PE Passenger Side J/B Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
7.INSPECT RELAY (Marking: P-IG1)
a. Remove the P-IG1 relay from the passenger side J/B.
b. Measure the resistance of the relay.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
Fig. 64: Identifying P
-IG1 Relay Terminals And Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: REPLACE DRIVER SIDE JUNCTION BLOCK
Tester ConnectionSpecified Condition
3 - 510 kohms or higher
3 - 5Below 1 ohms (when battery voltage is applied to terminal 1 and 2)

Fig. 66: Identifying Seat Climate Control Blower Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: Go to step 5
OK: Go to next step
3.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - BODY GROUND)
a. Disconnect the C27 or C29 blower connector.
b. Measure the resistance of the wire harness side connector.
Standard:
Rear LH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RH
Tester ConnectionSpecified Condition
C27-11 (GND) - Body groundBelow 1 ohms

Rear RH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RH
Fig. 67: Identifying Seat Climate Control Blower Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
4.CHECK WIRE HARNESS (SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL
ECU) - BODY GROUND)
a. Disconnect the C27 or C29 blower connector.
b. Measure the resistance of the wire harness side connector.
Tester ConnectionSpecified Condition
C29-11 (GND) - Body groundBelow 1 ohms

Standard:
Rear LH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RH
Rear RH
TESTER CONNECTION AND SPECIFIED CONDITION - REAR RH
Fig. 68: Identifying Seat Climate Control Blower Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: Go to step 10
OK: REPLACE SEAT CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU)
Tester ConnectionConditionSpecified Condition
C27-8 (SW) - Body groundClimate control switch ONBelow 1 ohms
Tester ConnectionConditionSpecified Condition
C29-8 (SW) - Body groundClimate control switch ONBelow 1 ohms

Fig. 69: Identifying LC Luggage Room J/B Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: Go to step 6
OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (LUGGAGE ROOM J/B ASSY -
CLIMATE CONTROL BLOWER (CLIMATE CONTROL ECU))
6.CHECK WIRE HARNESS (LUGGAGE ROOM J/B ASSY - BATTERY)
a. Disconnect the LL J/B connector.
b. Measure the voltage of the wire harness side connector.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
Tester ConnectionSpecified Condition
LL-1 - Body ground10 to 14 V