Inspection Procedure

1. Check if the illumination for the multi-display, steering pad switch, glove box light, cigarette lighter, or others (seat heater switch, front seat memory switch, etc) comes on when the light control switch is turned to the HEAD or TAIL position.

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   Illumination comes on for all components except steering pad switch	A
   Illumination comes on for all components except radio receiver	B
   Illumination comes on for all components except multi-display	C
   No illumination comes on for radio receiver, multi-display, glove box light, front seat memory switch, cigarette lighter, etc	D

B:  Go to step  6

C:  Go to step  7

D: GO TO LIGHTING SYSTEM  (See PROBLEM SYMPTOMS TABLE )

A: Go to next step 

1. Disconnect the P-D/C CUT fuses from passenger side junction block.
2. Measure the resistance of the fuses.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   P-D/C CUT fuse	Always	Below 1 Ω

NG: REPLACE FUSE 

OK: Go to next step 

1. Disconnect the L24 cable connector.
2. Disconnect the L10 meter connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L24-12 (ILL-) - L10-16 (ILL-)	Always	Below 1 Ω
   L24-12 (ILL-) - Body ground	Always	10 kΩ or higher

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L24-6 (+B) - Body ground	Always	11 to 14 V

   Fig 1: Checking Harness And Connector (Spiral Cable - Combination Meter And Battery)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 2: Checking Steering Pad Switch Assembly (Steering Pad Side)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the z8 switch connector.
2. Connect the positive (+) lead to terminal 2 (ILL+-1) and the negative (-) lead to terminal 5 (ILL- -1) of the steering pad switch connector.
3. Check if the illumination for the steering pad switch comes on.

   OK: Illumination for the steering pad switch comes on. 

NG: REPLACE STEERING PAD SWITCH ASSEMBLY (STEERING PAD SIDE)  (See REMOVAL  )

OK: Go to next step 

Fig 3: Inspecting Spiral Cable

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the cable connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L24-12 (ILL-) - z7-5 (ILL-)	Spiral cable is turned 2.5 rotations counterclockwise	Below 3 Ω
   	Spiral cable is centered
   	Spiral cable is turned 2.5 rotations clockwise
   L24-6 (+B) - z7-10 (+B)	Spiral cable is turned 2.5 rotations counterclockwise	Below 3 Ω
   	Spiral cable is centered
   	Spiral cable is turned 2 5 rotations clockwise

   NOTE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the PRECAUTION for the SRS (see PRECAUTION ).

NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY  (See REMOVAL )

OK: REPLACE STEERING PAD SWITCH (STEERING WHEEL SIDE)  (See REMOVAL  )

1. Disconnect the L51 receiver connector.
2. Disconnect the L10 meter connector.
3. Measure the resistance according to the value(s) in the table below

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L51-12 (ILL-) - L10-16 (ILL-)	Always	Below 1 Ω
   L51-12 (ILL-) - Body ground	Always	10 kΩ or higher

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   L51-2 (ILL+) - Body ground	Light control system TAIL or HEAD	11 to 14 V

   Fig 4: Checking Harness And Connector (Radio Receiver - Combination Meter And Battery)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL  )

1. Disconnect the L59 display connector
2. Disconnect the L10 meter connector
3. Measure the resistance according to the value(s) in the table below

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L59-5 (HILL) - L10-16 (ILL-)	Always	Below 1 Ω
   L59-5 (HILL) - Body ground	Always	10 kΩ or higher

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   L59-12 (ILL+) - Body ground	Light control switch TAIL or HEAD	11 to 14 V

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   OK (w/ Navigation System [for HDD])	A
   OK (w/ Navigation System [for DVD])	B
   OK (w/o Navigation System)	C
   NG	D

   Fig 5: Checking Harness And Connector (Display And Navigation Assembly - Battery And Combination Meter)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

B: REPLACE MULTI-DISPLAY  (see REMOVAL )

C: REPLACE MULTI-DISPLAY  (See REMOVAL  )

D: REPAIR OR REPLACE HARNESS OR CONNECTOR 

A: REPLACE DISPLAY AND NAVIGATION ASSEMBLY  (see REMOVAL )