Power Source Mode does not Change to ON (ACC)

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): Power Source Mode does not Change to ON (ACC)
- Power Source Mode does not Change to ON (ACC)

DESCRIPTION

When the electrical key transmitter is in the vehicle and the engine switch is pressed, the power source control ECU receives a signal and changes the power source mode.

Use this troubleshooting procedure when the power source mode does not change to on (ACC) but does change to on (IG).

HINT
* When the power source control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode changes to on (IG).
* When the battery cable is disconnected and reconnected, the power source mode returns to the mode it was in before the battery cable was disconnected.

WIRING DIAGRAM

Refer to "Power Source Mode does not Change to on (IG and ACC)" Power Source Mode does not Change to ON (IG and ACC).

INSPECTION PROCEDURE

NOTICE:
* When using the Techstream with the engine switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus: Body Electrical / Smart Key / Trouble Codes.
* Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart Smart Key System (for Start Function).
* The smart key system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting How to Proceed With Troubleshooting.
* If the smart key system is disabled through the customize function, enable the system before performing troubleshooting Smart Key System (for Start Function).
* Inspect the fuses of circuits related to this system before performing the following inspection procedure.
* After completing repairs, confirm that the problem does not reoccur.

HINT

Related Data List and Active Test Items










PROCEDURE

1. CHECK DTC (ALL) Power Source Mode does not Change to ON (IG and ACC)

NG -- GO TO DTC CHART
OK -- Continue to next step.

2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY) B2274

NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) B2274

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK POWER SOURCE CONTROL ECU B2274

NG -- REPLACE POWER SOURCE CONTROL ECU Removal

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting