Toyota CH-R Service Manual: Short in Telephone SUB Antenna Circuit (B1536,B1537)

Toyota CH-R Service Manual / Cellular Communication / Safety Connect System / Short in Telephone SUB Antenna Circuit (B1536,B1537)

DESCRIPTION

These DTCs are stored when the DCM (Telematics Transceiver) detects an open or a short in the telephone and GPS antenna assembly (for Front Side) circuit. The DCM (Telematics Transceiver) oscillates and receives 824 - 894 MHz or 1850 - 1990 MHz radio-frequency through the telephone and GPS antenna assembly (for Front Side).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1536

Short in Telephone SUB Antenna Circuit

Telephone and GPS antenna assembly (for Front Side) impedance is lower than malfunction criterion for 10 seconds when ignition switch is ON.

(Short circuit)
  • DCM (Telematics Transceiver)
  • Telephone and GPS antenna assembly (for Front Side)
  • Telephone and GPS antenna cord (antenna cord sub-assembly)

B1537

Open in Telephone SUB Antenna Circuit

Telephone and GPS antenna assembly (for Front Side) impedance is higher than malfunction criterion for 10 seconds when ignition switch is ON.

(Open circuit)
  • DCM (Telematics Transceiver)
  • Telephone and GPS antenna assembly (for Front Side)
  • Telephone and GPS antenna cord (antenna cord sub-assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

  • Before performing this diagnostic procedure, make sure to perform Health Check and confirm that the DCM/VIN registration information is correct.

    Click here

  • Refer to "PARTS LOCATION" for the installation location of telephone and GPS antenna cord.

    Click here

PROCEDURE

1.

CHECK DTC

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch ON and wait for 10 seconds.

(d) Turn the Techstream on.

(e) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(f) Recheck for DTCs.

Body Electrical > Telematics > Trouble Codes

Result

Proceed to

DTC B1536 or B1537 is output

A

DTC B1536 or B1537 is not output

B
B

CHECK FOR INTERMITTENT PROBLEMS

A

2.

INSPECT TELEPHONE AND GPS ANTENNA ASSEMBLY (for Front Side)

(a) Disconnect the D telephone and GPS antenna cord (antenna cord sub-assembly) connector from the telephone and GPS antenna assembly (for Front Side).

*a

Component without harness connected

(Telephone and GPS Antenna Assembly (for Front Side))

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 - 2a

Always

4 to 11 kΩ
NG

REPLACE TELEPHONE AND GPS ANTENNA ASSEMBLY (for Front Side)

OK

3.

INSPECT TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY)

(a) Disconnect the telephone and GPS antenna cord (antenna cord sub-assembly) connector from the telephone and GPS antenna assembly (for Front Side).

*a

Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly))

(b) Disconnect the telephone and GPS antenna cord (antenna cord sub-assembly) connector from the DCM (Telematics Transceiver).

*a

Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly))

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D-2 - A-1

Always

Below 1 Ω

D-2 or A-1 - Body ground

Always

10 kΩ or higher

D-2a - A-1a

Always

Below 1 Ω

D-2a or A-1a - Body ground

Always

10 kΩ or higher
NG

REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY)

OK

4.

REPLACE TELEPHONE AND GPS ANTENNA ASSEMBLY (for Front Side)

(a) Replace the telephone and GPS antenna assembly (for Front Side) with a known good one and check if the same problem occurs again.

Click here

OK:

The system returns to normal.

OK

END
NG

5.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

  • The ignition switch must be off.
  • Do not swap the DCM (Telematics Transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

    Backup Battery Degradation (B15EC)
    DESCRIPTION This DTC is set when the DCM (Telematics Transceiver) detects either of the following conditions. The BUB (Back-Up Battery) charge level becomes less than the criteria. T ...

    Manual (SOS) Switch Red Indicator Malfunction (B1570)
    DESCRIPTION This DTC is stored when the DCM (Telematics Transceiver) detects an open or short in the manual (SOS) switch red indicator circuit of the manual (SOS) switch. The manual (SOS) switch r ...

    Other materials:

    Toyota CH-R Service Manual > Navigation System: Certification ECU Vehicle Information Reading/Writing Process Malfunction (B15F7)
    DESCRIPTION This DTC is stored when items controlled by the certification ECU (smart key ECU assembly) cannot be customized via the navigation system vehicle customization screen. HINT: The certification ECU (smart key ECU assembly) controls the smart key system related items that are custo ...

    Toyota CH-R Service Manual > Smart Key System(for Entry Function): All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate
    DESCRIPTION If the entry lock and wireless door lock operations cannot be performed, the electrical key and TPMS receiver assembly may be malfunctioning, or there may be wave interference or problems in the communication which is used for the entry and wireless function between the electrical ...

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2024 Copyright www.tochr.net
    0.0119