Toyota CH-R Service Manual: How To Proceed With Troubleshooting

Toyota CH-R Service Manual / Seat / Seat Heater System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the seat heater system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

HINT:

  • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
  • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
  • The following 5 items are important points for problem analysis:

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

NEXT

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.

NEXT

4.

CHECK FOR DTC (AIR CONDITIONING SYSTEM)*

(a) Clear the DTCs.

  • for TMMT Made:

    Click here

  • for TMC Made:

    Click here

Body Electrical > Air Conditioner > Clear DTCs

(b) Check for DTCs.

  • for TMMT Made:

    Click here

  • for TMC Made:

    Click here

Body Electrical > Air Conditioner > Trouble Codes

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

A

5.

CHECK FOR DTC (SEAT HEATER SYSTEM)*

(a) Clear the DTCs.

Click here

Body Electrical > Air Conditioner > Clear DTCs

(b) Recheck for DTCs.

Click here

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

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

A

7.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check

Click here

(b) Terminals of ECU

Click here

(c) Inspection

NEXT

8.

REPAIR OR REPLACE

NEXT

9.

CONFIRMATION TEST

NEXT

END

    System Diagram
    SYSTEM DIAGRAM ...

    System Description
    SYSTEM DESCRIPTION FRONT SEAT HEATER (a) By operating the seat heater switch, the temperature can be controlled within a range of 35 to 42°C (95 to 108°F). (b) The seat heater switch indicator ...

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