Interior Light Auto Cut Circuit [08/2013 - ]: Procedure

1. Check symptoms.
   RESULT
   
   

   Result	Proceed to
   All the interior lights that receive power via the light cut relay do not illuminate.	A
   Battery saving function does not operate.	B

B → See step   7 

A: Go to next step 

1. Remove the light cut relay from the c1 light cut relay connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Voltage is not applied between terminals 1 and 2	10 kΩ or higher
   3 - 5	Voltage is applied between terminals 1 and 2	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Light Cut Relay)

NG → REPLACE LIGHT CUT RELAY 

OK: Go to next step 

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   c1-1 - Body ground	Ignition switch off	11 to 14 V
   c1-3 - Body ground	Ignition switch off	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Install the light cut relay to the c1 light cut relay connector.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   c1-5 - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Light Cut Relay)

NG → See step   5 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (LIGHT CUT RELAY - EACH LIGHT) 

1. Remove the light cut relay from the c1 light cut relay connector.
2. Disconnect the 3A instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   c1-2 - 3A-23	Always	Below 1 Ω
   c1-2 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the instrument panel junction block assembly. Refer to REMOVAL [08/2013 - ] .
2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   Component without harness connected (Instrument panel junction block assembly)

   -

   -

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   3A-23 - MB-22 (DOMR)	Always	Below 1 Ω

NG → See step   13 

OK → See step   11 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Active Test.
5. Check that the relay operates.
   MAIN BODY
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Relay for Interior Light Auto Cut Function	Light Auto Cut Relay	ON/OFF	-

   OK

   Light auto cut relay operates.

NG → See step   8 

OK → See step   11 

1. Remove the light cut relay from the c1 light cut relay connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Voltage is not applied between terminals 1 and 2	10 kΩ or higher
   3 - 5	Voltage is applied between terminals 1 and 2	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Light Cut Relay)

NG → REPLACE LIGHT CUT RELAY 

OK: Go to next step 

1. Disconnect the 3A instrument panel junction block assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   c1-2 - 3A-23	Always	Below 1 Ω
   c1-2 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the instrument panel junction block assembly. Refer to REMOVAL [08/2013 - ] .
2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   Component without harness connected (Instrument panel junction block assembly)

   -

   -

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   3A-23 - MB-22 (DOMR)	Always	Below 1 Ω
   3A-23 - Body ground	Always	10 kΩ or higher

NG → See step   13 

OK → See step   12