Power Source Mode does not Change to ON (ACC): Procedure

CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU) See step 1
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

OK: Go to next step
CHECK HARNESS AND CONNECTOR See step 2
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
INSPECT ACC RELAY See step 5
NG → REPLACE ACC RELAY

OK: Go to next step
CHECK HARNESS AND CONNECTOR See step 3
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
CHECK HARNESS AND CONNECTOR See step 4
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK POWER MANAGEMENT CONTROL ECU

Reconnect the all connectors.

Fig 1: Checking Power Management Control ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Voltage

Tester Connection	Condition	Specified Condition
D43-19 (ACCD) - Body ground	Engine switch off	Below 1 V
D43-19 (ACCD) - Body ground	Engine switch on (IG)	Output voltage at terminal AM21 or AM22 -2 V or more

TEXT IN ILLUSTRATION

*1	Components with harness connected (Power Management Control ECU)

NG → See step 7

OK → See step 8