Power Source Mode does not Change

1UR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: Power Source Mode does not Change
- Power Source Mode does not Change

DESCRIPTION

If the certification ECU detects the key inside the vehicle when the shift lever position is P and the brake pedal is not depressed, each press of the engine switch changes the power source mode in the following order: off, on (ACC), on (IG), off. If one of the DTCs shown in the following illustration is detected, correct the DTCs according to the DTC chart. If the power source mode is still malfunctioning, one of the following may have occurred: 1) the MPX circuit has a malfunction, 2) the certification ECU has determined that the key is not inside the vehicle, 3) the engine switch has a malfunction, or 4) the power source control ECU has a malfunction.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

(a) Delete the DTCs.

HINT
After all DTCs are cleared, check if the trouble occurs again 5 seconds after the engine switch is turned on (IG).

(b) Check for DTCs again.

OK:

No DTC is output.

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

2. CHECK BASIC FUNCTION

(a) When the key is inside the vehicle and the shift lever position is in P, check that depressing the brake pedal causes the engine switch indicator to illuminate green.

Result:





C -- GO TO ENGINE SWITCH INDICATOR CIRCUIT

B -- GO TO ROOM OSCILLATOR DOES NOT RECOGNIZE KEY

A -- REPLACE POWER SOURCE CONTROL ECU