Inspection Procedure

1. Disconnect the M15 ECU connector.
2. Disconnect the M13 battery connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE SPECIFICATIONS
   
   

   Tester Connection	Specified Condition
   M15-2 (BBI+) - M13-1 (BBO+)	Below 1 Ω
   M15-9 (BBI-) - M13-2 (BBO-)	Below 1 Ω
   M15-2 (BBI+) or M13-1 (BBO+) - Body ground	10 kΩ or higher
   M15-9 (BBI-) or M13-2 (BBO-) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR THEN CLEAR HISTORIC DTC 

Fig 1: Identifying M15 ECU Connector And M13 Battery Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Perform registration (see REGISTRATION  ).
2. Check for DTC again.

   OK: 

   No DTCs output. 

NG: REPLACE MAYDAY ECU ASSEMBLY THEN PERFORM REGISTRATION 

OK: END (MAYDAY BATTERY IS FAULTY; CLEAR HISTORIC DTC)