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

• When 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
  Where	Road conditions
  Under what conditions?	Driving conditions, weather conditions
  How did it happen?	Problem symptoms

HINT:

• A humid cabin and a rapid change in temperature may lead to condensation. Condensation in the cabin may cause a short circuit.
• The audio and visual system may not operate normally when the temperature is -20°C (-4°F) or lower, or 65°C (149°F) or higher.

System Diagram

SYSTEM DIAGRAM ...

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Other materials:

Toyota CH-R Service Manual > Immobiliser System(w/o Smart Key System): Unmatched Key Code (B2795)
DESCRIPTION This DTC is stored when a key with a different vehicle serial number is inserted into the ignition key cylinder. DTC No. Detection Item DTC Detection Condition Trouble Area Note B2795 Unmatched Key Cod ...

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 ...