Inspection Procedure

1. When the turn signal light switch is operated, check that the appropriate turn signal light flashes.

   Result 

   SIGNAL LIGHT FLASHES RESULT REFERENCE
   
   

   Condition	Proceed to
   All lights do not flash	A
   Front turn signal light (LH or RH) does not flash	B
   Rear turn signal light (LH or RH) does not flash	C

B: Go to step   6 

C: Go to step   8 

A: Go TO NEXT STEP. 

1. Remove the ECU-IG2 fuse from the instrument panel junction block.
2. Remove the HAZ fuse from the engine room No. 1 relay block.
3. Measure the resistance of the fuses.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: Go TO NEXT STEP. 

1. Disconnect the IB instrument panel junction block connector.
2. Remove the turn signal flasher relay from the instrument panel junction block.
3. Measure the voltage of the wire harness side connectors.

   Standard voltage 

   VOLTAGE SPECIFIED CONDITIONS
   
   

   Tester Connection	Condition	Specified Condition
   Junction block turn signal flasher relay terminal 4 (+B) - Body ground	Always	10 to 14 V
   Junction block turn signal flasher relay terminal 1 (IG) - Body ground	Ignition Switch ON	10 to 14 V

   Fig 1: Locating Turn Signal Flasher Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go TO NEXT STEP. 

1. Remove the headlight dimmer switch.
2. Inspect the turn signal switch.
3. Measure the resistance of the switch.

   Standard resistance 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Condition	Specified Condition
   13 (TR) - 12 (EL)	Right	Below 1 Ω
   13 (TR) - 12 (EL)	Neutral	10 kΩ or higher
   15 (TL) - 12 (EL)	Left	Below 1 Ω
   15 (TL) - 12 (EL)	Neutral	10 kΩ or higher

   Fig 2: Identifying Headlight Dimmer Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE HEADLIGHT DIMMER SWITCH 

OK: Go TO NEXT STEP. 

Fig 3: Identifying E15 Headlight Dimmer Switch And Turn Signal Flasher Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the turn signal flasher relay.
2. Disconnect the E15 headlight dimmer switch connector.
3. Measure the resistance of the wire harness side connectors and junction block.

   Standard resistance 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   Junction block turn signal flasher relay terminal 5 (EL) - E15-15 (TL)	Below 1 Ω
   Junction block turn signal flasher relay terminal 5 (EL) or E15-15 (TL) - Body ground	10 kΩ or higher
   Junction block turn signal flasher relay terminal 6 (ER) - E15-13 (TR)	Below 1 Ω
   Junction block turn signal flasher relay terminal 6 (ER) or E15-13 (TR) - Body ground	10 kΩ or higher
   E15-12 (EL) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE TURN SIGNAL FLASHER RELAY 

1. Remove the front turn signal light.
2. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, then check that the light comes on. (See Fig 4).

   OK: Light comes on. 

NG: REPLACE BULB 

OK: Go TO NEXT STEP. 

1. Disconnect the A12 and A24 front turn signal light connectors.
2. Disconnect the IB instrument panel junction block connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   IB-31 (LR) - A24-1	Below 1 Ω
   IB-31 (LR) or A24-1 - Body ground	10 kΩ or higher
   IB-14 (LL) - A12-1	Below 1 Ω
   IB-14 (LL) or A12-1 - Body ground	10 kΩ or higher

   Fig 4: Identifying A12, A24 & IB Instrument Panel Junction Block Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (FRONT TURN SIGNAL LIGHT - BODY GROUND) 

1. Remove the rear combinationl light.
2. Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 1, then check that the light comes on.
   Fig 5: Battery Connection To Rear Turn Signal Light Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Light comes on. 

NG: REPLACE BULB 

OK: Go TO NEXT STEP. 

1. Disconnect the K12 and K14 rear combination light connectors.
2. Disconnect the IA instrument panel junction block connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   IA-28 (LR) - K12-5	Below 1 Ω
   IA-28 (LR) or K12-5 - Body ground	10 kΩ or higher
   IA-27 (LL) - K14-5	Below 1 Ω
   IA-27 (LL) or K14-5 - Body ground	10 kΩ or higher

   Fig 6: Identifying K12, K14 & IA Instrument Panel Junction Block Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (REAR TURN SIGNAL LIGHT - BODY GROUND)