Toyota CH-R Service Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

  • If a problem occurs in certain locations or at certain times of day, check for the possibility of wave interference.
  • When the electrical key transmitter sub-assembly is brought near an electrical key and TPMS receiver assembly (RF band), door outside handle assembly (LF band), indoor electrical key antenna (LF band) or any of the electrical key antennas (LF band), the possibility of wave interference decreases. By doing this, whether wave interference is causing the problem can be checked.
  • 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 listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Smart Key System (for Entry Function)

Symptom

Suspected Area

Link

Entry interior alarm does not sound

Proceed to "Entry Interior Alarm does not Sound"

Entry exterior alarm and answer-back buzzer do not sound

Proceed to "Entry Exterior Alarm does not Sound"*1

Proceed to "Entry Exterior Alarm and Answer-back Buzzer do not Sound"*2

All door entry lock/unlock functions and wireless functions do not operate

Proceed to "All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate"

All door entry lock/unlock functions do not operate, but wireless functions operate

Proceed to "All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate"

Driver side door entry unlock function does not operate

Proceed to "Driver Side Door Entry Unlock Function does not Operate"

Front passenger side door entry unlock function does not operate

Proceed to "Front Passenger Side Door Entry Unlock Function does not Operate"

Driver side door entry lock and unlock functions do not operate

Proceed to "Driver Side Door Entry Lock and Unlock Functions do not Operate"

Front passenger side door entry lock and unlock functions do not operate

Proceed to "Front Passenger Side Door Entry Lock and Unlock Functions do not Operate"

Driver side door entry lock function does not operate

Proceed to "Driver Side Door Entry Lock Function does not Operate"

Front passenger side door entry lock function does not operate

Proceed to "Front Passenger Side Door Entry Lock Function does not Operate"

Back door entry unlock function does not operate

Proceed to "Back Door Entry Unlock Function does not Operate"

Back door entry lock and unlock functions do not operate

Proceed to "Back Door Entry Lock and Unlock Functions do not Operate"

Back door entry lock function does not operate

Proceed to "Back Door Entry Lock Function does not Operate"

New key cannot be registered

Proceed to "New Key cannot be Registered"

Additional key cannot be registered

Proceed to "Additional Key cannot be Registered"

New key registration warning message is not displayed

Proceed to "New Key Registration Warning Message is not Displayed"

  • *1: w/o Toyota Safety Sense P
  • *2: w/ Toyota Safety Sense P
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    TERMINALS OF ECU CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (a) Disconnect the F1 certification ECU (smart key ECU assembly) connector. (b) Measure the voltage and resistance according to t ...

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