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

CHECK DTC (ALL) See step 1
NG → See step 11

OK: Go to next step

CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

Disconnect the D89 power management control ECU connector.

Fig 1: Checking D89 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
D89-1 (AM22) - Body ground	Always	9.5 to 14 V

TEXT IN ILLUSTRATION

*a	Rear view of wire harness connector (to Power Management Control ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

OK: Go to next step

INSPECT IG2 RELAY
1. Remove the IG2 relay from the engine room relay block.
2. Inspect IG2 relay. Refer to ON-VEHICLE INSPECTION .
NG → REPLACE IG2 RELAY

OK: Go to next step

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2, IG1 NO. 3 AND IG1 NO. 4 RELAYS)

Disconnect the 2A and 2D instrument panel junction block assembly connectors.

Fig 2: Checking 2A & 2D Instrument Panel Junction Block Assembly Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

Tester Connection	Condition	Specified Condition
2A-16 - 2D-7	20°C (68°F)	50.63 to 123.75 Ω

TEXT IN ILLUSTRATION

*a	Component without harness connected (Instrument Panel Junction Block Assembly)

NG → REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK: Go to next step

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

Disconnect the D89 power management control ECU connector.
Disconnect the 2A instrument panel block assembly connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D89-20 (IG1D) - 2A-16	Always	Below 1 Ω
D89-20 (IG1D) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)

Disconnect the 2D instrument panel junction block assembly connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
2D-7 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - IG2 RELAY)

Disconnect the A35 power management control ECU connector.
Remove the IG2 relay from the engine room relay block.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A35-8 (IG2D) - 1 (IG2 relay terminal)	Always	Below 1 Ω
A35-8 (IG2D) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (IG2 RELAY - BODY GROUND)

Remove the IG2 relay from the engine room relay block.

Fig 3: Identifying IG2 Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

Tester Connection	Condition	Specified Condition
2 (IG2 relay terminal) - Body ground	Always	Below 1 Ω

TEXT IN ILLUSTRATION

*a	Component without relay connected (IG2 Relay Terminal)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT POWER MANAGEMENT CONTROL ECU See step 3
NG → See step 12

OK: Go to next step
CONFIRMATION TEST See step 8
NG → CHECK RELAY CONTACT CIRCUIT

OK → SYSTEM RETURNED TO NORMAL (PROBLEM OCCURRED DUE TO BAD CONNECTION, BUT RETURNED TO NORMAL BY RECONNECTING CONNECTOR)
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART
REPLACE POWER MANAGEMENT CONTROL ECU. Refer to REMOVAL