Inspection Procedure

1. Remove the TEL and AM2 fuses from the engine room junction block.
2. Remove the ACC fuse from the cowl side junction block LH.
3. Remove the MET fuse from the cowl side junction block RH.
4. Measure the resistance of the fuses.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: Go to next step 

1. Remove the ACC relay from the cowl side junction block LH.
2. Measure the resistance of the relay.

   Standard resistance 

   RESISTANCE SPECIFICATIONS
   
   

   Tester connection	Specified Condition
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

NG: REPLACE RELAY 

Fig 1: Identifying ACC Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Disconnect the M14 ECU connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage 

   VOLTAGE SPECIFICATIONS
   
   

   Tester Connection	Condition	Specified Condition
   M14-1 (+B) - Body ground	Always	10 to 14 V
   M14-13 (IG)-Body ground	Ignition switch ON	10 to 14 V
   M14-14 (ACC) - Body ground	Ignition switch ACC	10 to 14 V

   Standard resistance 

   RESISTANCE SPECIFICATIONS
   
   

   Tester Connection	Specified Condition
   M14-12(E)-Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 2: Identifying M14 ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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