Inspection Procedure

1. Disconnect the DOME fuse from the main body ECU.
2. Disconnect the P-ACC fuse from the passenger side junction block.
3. Measure the resistance of the fuses.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Condition	Specified Condition
   ACC fuse	Always	Below 1 Ω
   DOME fuse	Always	Below 1 Ω

NG: REPLACE FUSE 

OK: Go to next step. 

1. Disconnect the L38 clock connector.
Fig 1: Identifying L38 Clock Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Condition	Specified Condition
   L38-7 (E) - Body ground	Always	Below 1 Ω

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   L38-4 (ACC) - Body ground	Engine switch on (ACC)	11 to 14 V
   L38-8 (+B) - Body ground	Always	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE CLOCK ASSEMBLY  (See REMOVAL  )