PUSH BUTTON START SYSTEM DOES NOT OPERATE [SECURITY AND LOCKS]

id0903k7023500

Outline

Description

•  Main power does not switch to ACC or ON (READY off) when power switch is pressed.

Possible cause

•  Connector or terminal malfunction of the following parts:

―  Power switch

―  BCM

•  Short to power supply, short to ground, or open circuit in power switch signal circuit

•  Short to power supply or open circuit in power switch ground circuit

•  Power switch malfunction

•  BCM malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY ALL SYSTEM DTCs

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

Go to the next step.

2

INSPECT POWER SWITCH AND BCM CONNECTORS FOR MALFUNCTION

•  Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

3

INSPECT POWER SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY, SHORT TO GROUND, AND OPEN CIRCUIT

•  Inspect the signal circuit for a short to power supply, short to ground, and an open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

4

INSPECT POWER SWITCH GROUND CIRCUIT FOR SHORT TO POWER SUPPLY AND OPEN CIRCUIT

•  Inspect the ground circuit for a short to power supply and an open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

5

INSPECT POWER SWITCH FOR MALFUNCTION

•  Inspect the applicable part.
(See POWER SWITCH INSPECTION.)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See POWER SWITCH REMOVAL/INSTALLATION.)

Repair completion verification

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting. (Explain contents of repair to customer)

No

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].)

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction is not resolved, replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

Description	• Main power does not switch to ACC or ON (READY off) when power switch is pressed.
Possible cause	• Connector or terminal malfunction of the following parts: ― Power switch ― BCM • Short to power supply, short to ground, or open circuit in power switch signal circuit • Short to power supply or open circuit in power switch ground circuit • Power switch malfunction • BCM malfunction

Step	Inspection	Results	Action
1	VERIFY ALL SYSTEM DTCs • Perform the DTC inspection. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
1		No	Go to the next step.
2	INSPECT POWER SWITCH AND BCM CONNECTORS FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification.
3	INSPECT POWER SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY, SHORT TO GROUND, AND OPEN CIRCUIT • Inspect the signal circuit for a short to power supply, short to ground, and an open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT POWER SWITCH GROUND CIRCUIT FOR SHORT TO POWER SUPPLY AND OPEN CIRCUIT • Inspect the ground circuit for a short to power supply and an open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	INSPECT POWER SWITCH FOR MALFUNCTION • Inspect the applicable part. (See POWER SWITCH INSPECTION.) • Is the part normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See POWER SWITCH REMOVAL/INSTALLATION.)
Repair completion verification	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [L.H.D. (E)].) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction is not resolved, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)