Toyota Corolla Cross: Electronic Brake Booster Control Module "A" Missing Message (C121F87,...,C14CC1C)
DESCRIPTION
The brake control power supply assembly is used as an auxiliary power supply for brake control when the voltage of the auxiliary battery is low.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
DTC Output from |
Note |
|---|---|---|---|---|---|---|
|
C121F87 |
Electronic Brake Booster Control Module "A" Missing Message |
During IG ON, a brake control power supply assembly internal malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C136E17 |
Electronic Brake Booster Control Module "A" Backup Power Supply Voltage Circuit Voltage Above Threshold |
During IG ON, a brake control power supply assembly cell malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C136E1E |
Electronic Brake Booster Control Module "A" Backup Power Supply Voltage Circuit Resistance Out of Range |
During IG ON, brake control power supply assembly degradation (end-of-life notification) is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C136E49 |
Electronic Brake Booster Control Module "A" Backup Power Supply Voltage Internal Electronic Failure |
During IG ON, the brake control power supply assembly self-discharge amount (current leak) is detected to be excessive (internal malfunction). |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C137A04 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module System Internal Failure |
During IG ON, a brake control power supply assembly internal malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C137A17 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Circuit Voltage Above Threshold |
During IG ON, a brake control power supply assembly overvoltage malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C137A49 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Internal Electronic Failure |
During IG ON, a brake control power supply assembly power source circuit malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C137A86 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Signal (some circuit quantity, reported via serial data) Invalid |
While driving at a vehicle speed of 3 km/h or more, LIN communication from brake control power supply assembly is abnormal for 10 seconds or more. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C137A87 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Missing Message |
LIN communication with brake control power supply assembly is abnormal for 0.5 seconds or more. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C13BE00 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Charging Circuit |
During IG ON, a brake control power supply assembly power source backup unit internal circuit (backup output circuit) failure is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C13BE49 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Charging Circuit Internal Electronic Failure |
During IG ON, a brake control power supply assembly charging circuit malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C13DF1C |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Circuit Voltage Out of Range |
During IG ON, a brake control power supply assembly power source malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C13FC49 |
Electronic Brake Booster Control Module "A" Internal Electronic Failure |
LIN communication from brake control power supply assembly is abnormal for 0.1 seconds or more. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C13FD12 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Discharge Circuit Circuit Short to Battery |
During IG ON, a brake control power supply assembly discharging circuit malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C13FD14 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Discharge Circuit Circuit Short to Ground or Open |
During IG ON, a brake control power supply assembly discharging circuit malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C148E1C |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Sensor Circuit Voltage Out of Range |
During IG ON, a brake control power supply assembly internal circuit malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C14BF49 |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Backup Circuit Internal Electronic Failure |
During IG ON, a brake control power supply assembly backup circuit malfunction is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
|
C14CC1C |
Electronic Brake Booster Control Module "A" Backup Power Supply Module Temperature Sensor Circuit Voltage Out of Range |
During IG ON, a brake control power supply assembly power source backup unit internal circuit (voltage monitor circuit) failure is detected. |
|
Does not come on |
Brake Booster |
Output ECU: Electric brake booster (brake booster with master cylinder assembly) |
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 (+BC TERMINAL) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
(b) Disconnect the O223 brake control power supply assembly connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O223-1 (+BC) - Body ground |
Always |
11 to 14 V |
| NG | .gif)
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (GND TERMINAL) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(b) Disconnect the O223 brake control power supply assembly connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O223-4 (GND) - Body ground |
1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE CONTROL POWER SUPPLY ASSEMBLY) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(b) Disconnect the A189 electric brake booster (brake booster with master cylinder assembly) connector.
(c) Disconnect the O223 brake control power supply assembly connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A189-21 (CLIN) - O223-2 (LIN) |
Always |
Below 1 Ω |
|
A189-21 (CLIN) or O223-2 (LIN) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
A189-1 (CBKP) - O223-6 (OUT) |
Always |
Below 1 Ω |
|
A189-1 (CBKP) or O223-6 (OUT) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
A189-8 (CWKP) - O223-3 (WKUP) |
Always |
Below 1 Ω |
|
A189-8 (CWKP) or O223-3 (WKUP) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
REPLACE BRAKE CONTROL POWER SUPPLY ASSEMBLY |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
ECM Communication (C124A00)
DESCRIPTION
If the vehicle information stored by the skid control ECU (brake
actuator assembly) does not match that sent from the ECM or a new skid control ECU
(brake actuator assembly) is instal
Electronic Brake Booster Control Module "A" Backup Power Supply Voltage System
Voltage Low (C125DA2,C125DA3)
DESCRIPTION
The brake control power supply assembly is used as an auxiliary
power supply for brake control when the voltage of the auxiliary battery is low.
DTC No.
Detection
Electronic Brake Booster Input Stroke Sensor "A" Circuit Short to Ground (C127A11,...,C128F64)
DESCRIPTION
The relative displacement sensor is built into the brake booster
with master cylinder assembly.
When the relative displacement sensor inside the electric brake
booster (brake booster
SEE MORE:
Drive Motor "A" Position Sensor Internal Electronic Failure (P1CAD49,P1C651F,P1CB038)
DESCRIPTION The motor generator control ECU (MG ECU), which is built into the inverter with converter assembly, monitors its internal operation and detects malfunctions.
DTC No. Detection Item
DTC Detection Condition
Trouble Area MIL
Warning Indicate Note
P1C6
Removal
REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL)
Procedure Part Name Code
1 DRAIN ENGINE COOLANT
- -
- 2
VACUUM SWITCHING VALVE ASSEMBLY
25860 -
- -
3 AIR CLEANER CAP WITH AIR CLEANER HOSE
-
