Inspection Procedure

1. Turn the engine switch from on (IG) to off.
2. Turn the engine switch on (IG) and wait for 10 seconds.
3. Check for the DTC again and wait for 20 seconds.

   OK: 

   DTC 5-2 is not output. 

OK: CLEAR HISTORIC DTC 

NG: Go to next step 

1. Check for DTC using the intelligent tester.

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   Related to supplemental restraint system	A
   No DTC	B

A:  GO TO SUPPLEMENTAL RESTRAINT SYSTEM

B: Go to next step 

1. Disconnect the cable from the negative (-) battery terminal and wait for 90 seconds.
2. Disconnect the U45 ECU connector.
3. Disconnect the K44 airbag sensor connector.
4. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   U45-16 (GSW) - K44-24 (GSW3)	Below 1 Ω
   U45-16 (GSW) or K44-24 (GSW3) - Body ground	10 kΩ or higher

   Fig 1: Identifying U45 ECU Connector And K44 Airbag Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: REPLACE MAYDAY ECU TOGETHER WITH MAYDAY BATTERY AND THEN PERFORM REGISTRATION