Toyota CH-R Service Manual: Dcm Power Source Circuit
DESCRIPTION
This is the power source circuit to operate the DCM (Telematics Transceiver).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - BATTERY AND GROUND) |
|
(a) Disconnect the F134 DCM (Telematics Transceiver) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F134-4 (E) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F134-1 (+B) - F134-4 (E) |
Always |
11 to 14 V |
|
F134-7 (IG2) - F134-4 (E) |
Ignition switch ON |
11 to 14 V |
|
F134-8 (ACC) - F134-4 (E) |
Ignition switch ACC |
11 to 14 V |
| OK | .gif) |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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 ...
Green And Red Indicators Do Not Come On When Ig-on
DESCRIPTION
If the red and green indicators fail to illuminate after the ignition switch
turned to ON, the vehicle does not recognize the DCM (Telematics Transceiver). The
DCM (Telematics Transce ...
Other materials:
Toyota CH-R Service Manual > Window / Glass: Window Defogger Wire
Precaution
PRECAUTION
IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs depending on the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch (Position)
...
Toyota CH-R Service Manual > Immobiliser System(w/o Smart Key System): Theft Deterrent System Communication Line High Fixation (B279A)
DESCRIPTION
If the communication line (EFIO-IMI) to the transponder key ECU assembly is stuck
high (e.g. shorted to +B), the ECM stores this DTC.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
Note
B279A
...
Toyota C-HR (AX20) 2023-2025 Owner's Manual
Toyota CH-R Owners Manual
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Toyota CH-R Service Manual
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