Power Mode does not Change to ON (ACC)
Circuit diagnosis
DESCRIPTION
When the engine switch is pushed with the electrical key in the cabin, the power source control ECU receives signals to switch the power source mode.- HINT:
- To allow use of the intelligent tester to inspect the entry and start system when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the intelligent tester and the power source control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1. INSPECT FUSE (AM2) |
Remove the AM2 fuse from the cowl side J/B RH.
Measure the resistance of the fuse.
- Standard resistance:
- Below 1 Ω
|
|
||||
| OK | |
 |
| 2. CHECK CONNECTORS |
Check that the connectors are securely connected and the terminals are not deformed or loose.
- OK:
- The connectors are securely connected and the terminals are not deformed or loose.
|
|
||||
| OK | |
|
| 3. INSPECT WIRE HARNESS (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND) |
Disconnect the ECU connector.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection (Symbols)
Condition
Specified Condition
J55-12 (AM1) - Body ground
Always
10 to 14 V
J55-33 (AM2) - Body ground
Always
10 to 14 V
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection (Symbols)
Condition
Specified Condition
J55-6 (GND2) - Body ground
Always
Below 1 Ω
|
|
||||
| OK | |
|
| 4. INSPECT COWL SIDE JUNCTION BLOCK RH (ACC RELAY, PWR POINT RELAY) |
Disconnect the cowl side J/B RH connectors.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection
Condition
Specified Condition
RD-2 - RA-5 or RD-7
Always
68 to 250 Ω at 20°C (68°F)
RM-1 - RD-27
When battery voltage is applied to terminals RD-2 and RA-5 or RD-7
Below 1 Ω
RM-1 - RJ-16
When battery voltage is applied to terminals RD-2 and RA-5 or RD-7
Below 1 Ω
|
|
||||
| OK | |
|
| 5. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU OR BATTERY - COWL SIDE J/B RH) |
Measure the resistance of the wire harness side connector.
- Standard resistance:
Tester Connection (Symbols)
Condition
Specified Condition
J55-11 (ACCD) - RD-2
Always
Below 1 Ω
J55-11 (ACCD) - Body ground
Always
10 kΩ or higher
RA-5 - Body ground
Always
Below 1 Ω
RD-7 - Body ground
Always
Below 1 Ω
Measure the voltage of the wire harness side connector.
- Standard voltage:
Tester Connection
Condition
Specified Condition
RM-1 - Body ground
Always
10 to 14 V
|
|
||||
| OK | |
|
| 6. INSPECT POWER SOURCE CONTROL ECU |
Reconnect the connector.
Measure the voltage of the wire harness side connector.
- Standard voltage:
Tester Connection (Symbols)
Condition
Specified Condition
J55-11 (ACCD) - Body ground
Engine switch off
Below 1 V
Engine switch on (ACC)
8 to 14 V
|
|
||||
| OK | ||
 |
||
| ||
| 7. REPLACE FAULTY J/B AND CHECK POWER SOURCE CONTROL ECU |
Replace a faulty relay or J/B and then connect the power source control ECU connector.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection (Symbols)
Condition
Specified Condition
J55-11 (ACCD) - Body ground
Engine switch off
Below 1 V
Engine switch on (ACC)
8 to 14 V
|
|
||||
| OK | ||
|
||
| ||
| 8. REPLACE FAULTY WIRE HARNESS OR CONNECTOR AND CHECK POWER SOURCE CONTROL ECU |
Repair or replace a faulty wire harness or connector and then connect the power source control ECU connector.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection (Symbols)
Condition
Specified Condition
J55-11 (ACCD) - Body ground
Engine switch off
Below 1 V
Engine switch on (ACC)
8 to 14 V
|
|
||||
| OK | ||
|
||
| ||