Toyota Camry (XV70): Brake System Control Module "A" System Voltage System Voltage High (C137BA3)
DESCRIPTION
If a malfunction is detected in the power supply circuit, the skid control ECU (brake actuator assembly) stores this DTC and the fail-safe function prohibits ABS operation.
This DTC is stored when the +BS terminal voltage deviates due to a malfunction in a power supply or charging system circuit such as the battery or alternator circuit, etc.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
|---|---|---|---|
|
C137BA3 | Brake System Control Module "A" System Voltage System Voltage High |
+BS terminal voltage is more than 16.5 V for 1 second or more. |
|
WIRING DIAGRAM
Refer to DTC C137BA2
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CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and system information memorization.
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PROCEDURE
| 1. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL) |
| (a) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. |
|
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(b) Disconnect the A34 skid control ECU (brake actuator 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 |
|---|---|---|
|
A34-30 (+BS) - Body ground |
Always | 11 to 14 V |
| OK | .gif) | REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Stop Lamp Relay Actuator Stuck On (C13807E)
DESCRIPTION When any of the following conditions are met, the skid control ECU (brake actuator assembly) sets the drive output (STPO) ON which operates the stop light control relay (stop light switch
Stop Lamp Relay Actuator Stuck Off (C13807F)
DESCRIPTION Refer to DTC C13807E. Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
C13807F Stop Lamp Relay Actuator Stuck Off
When the voltage
Brake Pressure Control Solenoid "A" Control Circuit Short to Battery (C13C012,...,C13C949)
DESCRIPTION The ABS solenoid relay and master cylinder cut solenoid valves are built into the brake actuator assembly.
Depending on the operating conditions, the master cylinder cut solenoid valves
SEE MORE:
Test Mode Procedure
TEST MODE PROCEDURE SENSOR CHECK USING DEALER MODE (SIGNAL CHECK)
NOTICE:
After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.
After replacing or removing and installing a speed
On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT
CAUTION: Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.
PROCEDURE
1. CHECK RADIATOR CAP SUB-ASSEMBLY CAUTION: Do
