DESCRIPTION
If the engine switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode.
Related Data List and Active Test Items
Problem Symptom |
Data List and Active Test |
---|---|
Power source mode does not change to on (ACC) but does change to on (IG) |
Power Source Control
Starting Control
|
WIRING DIAGRAM
Click here
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
Click here
HINT:
When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.
PROCEDURE
1. |
CHECK FOR DTC |
(a) Using the Techstream, check for certification ECU (smart key ECU assembly) DTCs.
Body Electrical > Power Source Control > Trouble Codes Body Electrical > Smart Key > Trouble Codes Body Electrical > Starting Control > Trouble Codes
Result |
Proceed to |
---|---|
DTCs are not output |
A |
Smart key system (for Start Function) DTCs are output |
B |
B | ![]() |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
2. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) |
Click here
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY) |
Click here
NG | ![]() |
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
|
4. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Click here
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
NG | ![]() |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Toyota CH-R Service Manual > Tire Pressure Warning System: Receiver Error (C2176/76)
DESCRIPTION
The signals are transmitted to the tire pressure warning ECU and receiver in
the vehicle as radio waves.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
Note
C2176/76
Receiver Error
...
Toyota CH-R Service Manual > Seat Heater System: Lost Communication with Front Seat Temperature Adjustment Switch LIN (B14B5)
DESCRIPTION
The seat heater switch (air conditioning control assembly) communicates with
the air conditioning amplifier assembly via LIN communication.
If the LIN communication system is malfunctioning, the air conditioning amplifier
assembly will not operate even if the seat heater switch (ai ...