CAUTION / NOTICE / HINT
HINT:
PROCEDURE
1. |
VEHICLE BROUGHT TO WORKSHOP |
|
2. |
CUSTOMER PROBLEM ANALYSIS |
HINT:
What |
Vehicle model, system name |
When |
Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time |
Where |
Whether the problem occurs at a specific location |
Under what conditions? |
Whether the doors were locked or unlocked, whether the ignition switch was ON, whether the engine has started |
How did it happen? |
Problem symptoms |
|
3. |
INSPECT BATTERY VOLTAGE |
(a) Measure the battery voltage.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
(b) Check the fuses and relays.
(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
|
4. |
CHECK FOR DTC (AIR CONDITIONING SYSTEM)* |
(a) Clear the DTCs.
Click here
Click here
(b) Check for DTCs.
Click here
Click here
OK:
DTCs are not output
Result |
Proceed to |
---|---|
OK |
A |
NG (for TMMT Made) |
B |
NG (for TMC Made) |
C |
B | ![]() |
GO TO AIR CONDITIONING SYSTEM |
C | ![]() |
GO TO AIR CONDITIONING SYSTEM |
|
5. |
CHECK FOR DTC (SEAT HEATER SYSTEM)* |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs.
Click here
Result |
Proceed to |
---|---|
DTCs are not output |
A |
DTCs are output |
B |
B | ![]() |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
6. |
PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
Result |
Proceed to |
---|---|
Fault is not listed in problem symptoms table |
A |
Fault is listed in problem symptoms table |
B |
B | ![]() |
ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
|
7. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Operation Check
Click here
(b) Terminals of ECU
Click here
(c) Inspection
|
8. |
REPAIR OR REPLACE |
|
9. |
CONFIRMATION TEST |
NEXT | ![]() |
END |
Toyota CH-R Service Manual > Occupant Classification Ecu: Removal
REMOVAL
CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization, or registration)
that must be performed after parts are removed, installed, or replaced during the
occupant detection ECU removal/installation are shown below.
Necessary Procedure After Parts Re ...
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 ...