Cockpit Control Module Communication Stop Mode [11/2021 - ]: Procedure

1. Turn the ignition switch to off.
2. Disconnect the F61 navigation ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Front view of wire harness connector (to Navigation ECU Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F61-30 (J)_E/C CAN_H - F61-31 (J)_E/C CAN_L	Ignition switch off	52 to 62 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NAVIGATION ECU ASSEMBLY) 

Result: 

OK 

See step  2

1. Disconnect the F62 navigation ECU assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Front view of wire harness connector (to Navigation ECU Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F62-7 (GND) - Chassis ground	Ignition switch off	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F62-3 (IGN) - Chassis ground	Ignition switch ON	10 to 15 V
   F62-4 (+B BACKUP) - Chassis ground	Always	10 to 15 V
   F62-9 (+B DIRECT) - Chassis ground	Always	10 to 15 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NAVIGATION ECU ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)