DESCRIPTION
When the key is in the vehicle and the power switch is pressed, the power management control ECU receives a signal and changes the power source mode.
Tech Tips
When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) auxiliary battery terminal, the power source mode changes to on (IG).
When the auxiliary battery cable is disconnected and reconnected, the power source returns to the mode it was in before the auxiliary battery cable was disconnected.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
When using the GTS with the power 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 GTS and vehicle begins, or 2) connect the GTS to the vehicle, select the vehicle type under manual mode, and then enter the following menus:
for Power Source Control: Body Electrical / Power Source Control / Trouble Codes.
for Entry&Start: Body Electrical / Entry&Start / Trouble Codes.
Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart Click here.
The entry and start 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 Click here.
If the entry and start system is disabled through the customize function, enable the system before performing troubleshooting Click here.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
After completing repairs, confirm that the problem does not occur.
Tech Tips
Problem Symptom | Data List Item | Active Test Item |
---|---|---|
Power source mode does not change to on (IG) or on (ACC) |
Power Source Control |
- |
PROCEDURE
CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU)
Disconnect the L5 and L6 connectors from the power management control ECU.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
READ VALUE USING GTS
Reconnect the L5 and L6 connectors to the power management control ECU.
Turn the power switch off.
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Power Source Control / Data List.
Read the Data List according to the display on the GTS.
Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
---|---|---|---|
Key Certif Wait T-Out | Key verification malfunction/No or Yes | No: Verification normal Yes: Verification error (detected when ID code from key and ID stored in certification ECU (smart key ECU assembly) do not match) |
The hybrid control system can be started, even if this item displays "Yes". |
OK |
---|
When more than 1 second elapses after the power switch is turned from off to on (IG), No is displayed in the Data List. |
NG |
CHECK FOR DTC Click here |
OK |
READ VALUE USING GTS
Read the Data List according to the display on the GTS.
Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
---|---|---|---|
Start Switch1 | Condition of power switch contact 1/OFF or ON | OFF: Power switch not pressed ON: Power switch pressed |
|
Start Switch2 | Condition of power switch contact 2/OFF or ON | OFF: Power switch not pressed ON: Power switch pressed |
|
OK |
---|
ON (power switch is pushed) and OFF (power switch is not pushed) appear on the screen. |
NG |
CHECK POWER SWITCH Click here |
OK |
CHECK POWER MANAGEMENT CONTROL ECU
Read the Data List according to the display on the GTS.
Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
---|---|---|---|
Power Supply Condition | State of power supply/All OFF, ACC ON, IG1 ON, IG2 ON, ST ON | All OFF: Power switch off (power supply off) ACC ON: Power switch on (ACC) (ACC relay on) IG1 ON: Power switch on (IG) (IG1 relay on) IG2 ON: Power switch on (IG) (IG2 relay on) ST ON: Starting hybrid control system |
Since "IG1 ON" and "IG2 ON" turn "on" at approximately the same time, "IG1 ON" may not be displayed ("IG1 ON" turns on for a very short time). |
Measure the voltage while checking the Data List on the GTS.
Standard Voltage | ||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPLACE POWER MANAGEMENT CONTROL ECU Click here |
OK |
CONFIRMATION TEST
Check that the power source mode becomes on (ACC) and on (IG) when the power switch is operated.
OK |
---|
Power source mode becomes on (ACC) and on (IG) when the power switch is operated. |
OK |
USE SIMULATION METHOD TO CHECK Click here |
NG |
CHECK RELAY CONTACT SIDE CIRCUIT |
CHECK POWER SWITCH
*a | Component without harness connected (Power Switch) |
Remove the power switch Click here.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPLACE POWER SWITCH Click here |
OK |
CHECK HARNESS AND CONNECTOR (POWER SWITCH - POWER MANAGEMENT CONTROL ECU AND BODY GROUND)
Disconnect the L5 and L6 connectors from the power management control ECU.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
OK |
REPLACE POWER MANAGEMENT CONTROL ECU Click here |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
CHECK FOR DTC
Enter the following menus:
for Power Source Control: Body Electrical / Power Source Control / Trouble Codes.
for Entry&Start: Body Electrical / Entry&Start / Trouble Codes.
Check for DTCs.
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
A |
GO TO OTHER FLOW CHART (Room Oscillator does not Recognize Key) Click here |
B |
GO TO OTHER FLOW CHART (DTC B2287) Click here |
C |
GO TO DIAGNOSTIC TROUBLE CODE CHART |