Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Turn the engine switch on (IG) and turn the intelligent tester main switch on.
3. Select the item below in the ACTIVE TEST and then check that the relay operates.

   MAIN BODY (MAIN BODY ECU): 

   DATA LIST
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   F FOG LIGHT RLY	Front fog light relay (Taillights are ON)	ON / OFF	-

   OK: Front fog light relay operates. (Front fog lights come on.) 

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

NG: Go to next step. 

1. Remove the FR FOG fuse from the instrument panel J/B assembly.
2. Measure the resistance of the fuse.

   Standard resistance: Below 1 Ω 

NG: REPLACE FUSE 

OK: Go to next step. 

1. Remove the front fog light relay from the instrument panel junction block assembly.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or higher
   	Below 1 Ω (When battery voltage is applied to terminals 1 and 2)

   Fig 1: Identifying Fog Light Relay Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FOG LIGHT RELAY 

OK: Go to next step. 

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   DC-1 - Body ground	Light control switch in HEAD, front fog light switch OFF → ON	Below 1 V → 10 to 14 V
   DD-5 - Body ground	Light control switch in HEAD, front fog light switch OFF → ON	Below 1 V → 10 to 14 V

   Fig 2: Identifying DD And DC Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - BODY GROUND) 

NG: Go to next step. 

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   DL-3 - Body ground	Light control switch OFF → TAIL	Below 1 V → 10 to 14 V

Fig 3: Identifying DL Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

OK: Go to next step. 

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   DL-4 - Body ground	Light control switch OFF → TAIL	Below 1 V → 10 to 14 V

Fig 4: Identifying DL Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Disconnect the Dl instrument panel assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   DI-8 - Body ground	Light control switch OFF → TAIL	Below 1 V → 10 to 14 V

Fig 5: Identifying DI Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

OK: Go to next step. 

1. Disconnect the E61 main body ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   E61-4 - DI-8	Always	Below 1 Ω

Fig 6: Identifying DI And E61 Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY