DESCRIPTION
This DTC is set when the DCM (Telematics Transceiver) detects a malfunction in the telephone microphone assembly circuit.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
B1572 |
Telephone Microphone Error |
Current of MCVD reaches malfunction criteria for 10 seconds while ignition switch is ON. |
|
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
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 B1572 is output |
A |
DTC B1572 is not output |
B |
B | ![]() |
CHECK FOR INTERMITTENT PROBLEMS |
|
2. |
INSPECT MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY POWER SOURCE) |
(a) Remove the map light assembly (telephone microphone assembly) but do not disconnect the connectors. Click here
|
|
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
R2-9 (MACC) - Body ground |
Ignition switch ACC |
4 to 6 V |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
R2-7 (MCO-) - Body ground |
Always |
Below 1 Ω |
NG | ![]() |
GO TO STEP 4 |
|
3. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY)) |
(a) Disconnect the F134 DCM (Telematics Transceiver) connector.
(b) Disconnect the R2 map light assembly (telephone microphone assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F134-34 (MIC+) - R2-8 (MCO+) |
Always |
Below 1 Ω |
F134-34 (MIC+) or R2-8 (MCO+) - Body ground |
Always |
10 kΩ or higher |
F134-35 (MIC-) - R2-7 (MCO-) |
Always |
Below 1 Ω |
F134-35 (MIC-) or R2-7 (MCO-) - Body ground |
Always |
10 kΩ or higher |
F134-32 (SGND) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
REPLACE MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE ASSEMBLY) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
4. |
INSPECT DCM (TELEMATICS TRANSCEIVER) (TELEPHONE MICROPHONE ASSEMBLY POWER SOURCE) |
(a) Remove the DCM (Telematics Transceiver) but do not disconnect the connectors. Click here
|
|
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F134-33 (MCVD) - Body ground |
Ignition switch ACC |
4 to 6 V |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F134-35 (MCI-) - Body ground |
Always |
Below 1 Ω |
OK | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
REPLACE DCM (TELEMATICS TRANSCEIVER) |
(a) Replace the DCM (Telematics Transceiver).
Click here
NOTICE:
NEXT | ![]() |
PERFORM DCM ACTIVATION |
Toyota CH-R Service Manual > Lighting (int): Vanity Light Bulb
Replacement
REPLACEMENT
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for both the LH and RH sides.
The procedure described below is for the LH side.
PROCEDURE
1. REMOVE VANITY LIGHT ASSEMBLY
Click here
2. REMOVE VANITY LIGHT BULB
(a) Remove the vanity light bul ...
Toyota CH-R Service Manual > Vehicle Stability Control System: Steering Angle Sensor Output Malfunction (C1434)
DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the steering
angle sensor via CAN communication.
HINT:
If there is a malfunction in the bus lines between the steering angle sensor
and the CAN communication system, DTC U0126 (Lost Communication with Steering An ...