DESCRIPTION
Each solenoid adjusts the pressure which affects each wheel cylinder according to signals from the skid control ECU (brake booster with master cylinder assembly) and controls the vehicle.
DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | MIL | Note |
---|---|---|---|---|---|---|
C1352 | Increasing Pressure Solenoid (FR) | 11 1100 1101 1102 1103 1170 |
|
| Comes on |
|
C1353 | Increasing Pressure Solenoid (FL) | 13 1106 1107 1108 1109 1172 |
|
| Comes on |
|
C1354 | Increasing Pressure Solenoid (RR) | 15 1112 1113 1114 1115 1174 |
|
| Comes on |
|
C1355 | Increasing Pressure Solenoid (RL) | 17 1118 1119 1120 1121 1176 |
|
| Comes on |
|
C1356 | Decreasing Pressure Solenoid (FR) | 12 1104 1105 1171 |
|
| Comes on |
|
C1357 | Decreasing Pressure Solenoid (FL) | 14 1110 1111 1173 |
|
| Comes on |
|
C1358 | Decreasing Pressure Solenoid (RR) | 16 1116 1117 1175 |
|
| Comes on |
|
C1359 | Decreasing Pressure Solenoid (RL) | 18 1122 1123 1177 |
|
| Comes on |
|
MONITOR DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) monitors the drive voltage and current of the ABS holding solenoid and ABS reduction solenoid. Based on the monitored information, if any of the following abnormal conditions are detected, the MIL is illuminated and a DTC is stored.
MONITOR STRATEGY
Related DTCs | C12A6 (Case 1): ABS holding solenoid range/performance C12A6 (Case 2): ABS holding solenoid range/performance C12A7: ABS holding solenoid circuit low C12A8 (Case 1): ABS holding solenoid circuit high C12A8 (Case 2): ABS holding solenoid circuit high C12A8 (Case 3): ABS holding solenoid circuit high C12B2: ABS reduction solenoid circuit low C12B3 (Case 1): ABS reduction solenoid circuit high C12B3 (Case 2): ABS reduction solenoid circuit high C12B3 (Case 3): ABS reduction solenoid circuit high C12BC (Case 1): ABS holding solenoid range/performance C12BC (Case 2): ABS holding solenoid range/performance C12BD: ABS holding solenoid circuit low C12BE (Case 1): ABS holding solenoid circuit high C12BE (Case 2): ABS holding solenoid circuit high C12BE (Case 3): ABS holding solenoid circuit high C12C8: ABS reduction solenoid circuit low C12C9 (Case 1): ABS reduction solenoid circuit high C12C9 (Case 2): ABS reduction solenoid circuit high C12C9 (Case 3): ABS reduction solenoid circuit high C12D2 (Case 1): ABS holding solenoid range/performance C12D2 (Case 2): ABS holding solenoid range/performance C12D3: ABS holding solenoid circuit low C12D4 (Case 1): ABS holding solenoid circuit high C12D4 (Case 2): ABS holding solenoid circuit high C12D4 (Case 3): ABS holding solenoid circuit high C12DE: ABS reduction solenoid circuit low C12DF (Case 1): ABS reduction solenoid circuit high C12DF (Case 2): ABS reduction solenoid circuit high C12DF (Case 3): ABS reduction solenoid circuit high C12E8 (Case 1): ABS holding solenoid range/performance C12E8 (Case 2): ABS holding solenoid range/performance C12E9: ABS holding solenoid circuit low C12EA (Case 1): ABS holding solenoid circuit high C12EA (Case 2): ABS holding solenoid circuit high C12EA (Case 3): ABS holding solenoid circuit high C12F4: ABS reduction solenoid circuit low C12F5 (Case 1): ABS reduction solenoid circuit high C12F5 (Case 2): ABS reduction solenoid circuit high C12F5 (Case 3): ABS reduction solenoid circuit high |
Required Sensors/Components(Main) | Skid control ECU (brake booster with master cylinder assembly) Brake actuator assembly |
Required Sensors/Components(Related) | Skid control ECU (brake booster with master cylinder assembly) Brake actuator assembly |
Frequency of Operation | Continuous |
Duration | 54 times: C12B2, C12C8, C12DE and C12F4 0.054 seconds: C12A6 (Case 1 and 2), C12A7, C12A8 (Case 1, 2 and 3), C12B3 (Case 1, 2 and 3), C12BC (Case 1 and 2), C12BD, C12BE (Case 1, 2 and 3), C12C9 (Case 1, 2 and 3), C12D2 (Case 1 and 2), C12D3, C12D4 (Case 1, 2 and 3), C12DF (Case 1, 2 and 3), C12E8 (Case 1 and 2), C12E9, C12EA (Case 1, 2 and 3) and C12F5 (Case 1, 2 and 3) |
MIL Operation | Immediately |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
All Monitor runs whenever the following DTCs are not stored | None |
Serial communication with low side IC | Valid |
All of the following conditions are met | - |
Power supply for ABS solenoid | Higher than 9.13 V |
Serial communication with low side IC | Valid |
Output duty cycle | Higher than 40% |
ABS holding solenoid current monitor | Normal |
ABS solenoid power supply relay | On |
Both of the following conditions are met | - |
Serial communication with low side IC | Valid |
Current monitor power supply | Higher than 1.2 V, and less than 1.38 V |
All of the following conditions are met | - |
Serial communication with low side IC | Valid |
ABS solenoid power supply relay | On |
Output duty cycle | 0% |
All of the following conditions are met | - |
Serial communication with low side IC | Valid |
Power supply for ABS solenoid | Higher than 9.13 V |
Output duty cycle | 0% |
ABS solenoid power supply relay | On |
All of the following conditions are met | - |
ABS solenoid power supply relay | On |
Serial communication with low side IC | Valid |
Command to reduction solenoid on/off | On |
ABS reduction solenoid current | Less than 4.4 A |
All of the following conditions are met | - |
Serial communication with low side IC | Valid |
ABS solenoid power supply relay | On |
Command to reduction solenoid on/off | Off |
All of the following conditions are met | - |
Serial communication with low side IC | Valid |
Power supply for ABS solenoid | Higher than 9.13 V |
Command to reduction solenoid on/off | Off |
ABS solenoid power supply relay | On |
TYPICAL MALFUNCTION THRESHOLDS
C12A6, C12BC, C12D2 and C12E8 (Case 1) ABS holding solenoid voltage | Higher than 35 V |
One of the following conditions is met | A, B or C |
A. Both of the following conditions are met | - |
ABS holding solenoid current monitor value | Less than 46 |
ABS holding solenoid current | Less than 3.5 A |
B. Current monitor power supply | Higher than 1.38 V, or less than 1.2 V |
C. AC/DC converter built into CPU standard voltage | Less than 4.4 V |
ABS holding solenoid current | Less than 0.2 A |
ABS holding solenoid current | Higher than 3.5 A |
ABS holding solenoid voltage | Less than 11.25 V |
ABS holding solenoid voltage | Less than 4.128 V |
Either of the following conditions is met | - |
ABS reduction solenoid voltage | Higher than 4.2 V |
ABS reduction solenoid current | Less than 0.02 A |
ABS reduction solenoid current | Higher than 4.4 A |
ABS reduction solenoid voltage | Less than 11.25 V |
ABS reduction solenoid voltage | Less than 4.128 V |
COMPONENT OPERATING RANGE
C12A6, C12BC, C12D2 and C12E8 (Case 1) All of the following conditions are met | - |
ABS solenoid power supply relay | On |
Serial communication with low side IC | Valid |
Output duty cycle | Higher than 0% |
Low side IC malfunction | Not detected |
ABS holding solenoid voltage | Less than 35 V |
All of the following conditions are met | - |
ABS solenoid power supply relay | On |
Serial communication with low side IC | Valid |
ABS holding solenoid current monitor value | 46 or more |
Current monitor power supply | 1.38 V or less, and 1.2 V or more |
AC/DC converter built into CPU standard voltage | Higher than 4.4 V |
All of the following conditions are met | - |
ABS solenoid power supply relay | On |
Serial communication with low side IC | Valid |
Output duty cycle | Higher than 40% |
ABS holding solenoid current monitor | Normal |
ABS holding solenoid current | 0.2 A or more |
All of the following conditions are met | - |
ABS solenoid power supply relay | On |
Serial communication with low side IC | Valid |
Output duty cycle | Higher than 0% |
Low side IC malfunction | Not detected |
ABS holding solenoid current | Less than 3.5 A |
All of the following conditions are met | - |
Serial communication with low side IC | Valid |
ABS solenoid power supply relay | On |
Output duty cycle | 0% |
ABS holding solenoid voltage | Higher than 11.29 V |
All of the following conditions are met | - |
Serial communication with low side IC | Valid |
ABS solenoid power supply relay | On |
Output duty cycle | 0% |
ABS holding solenoid voltage | Higher than 4.2 V |
All of the following conditions are met | - |
ABS solenoid power supply relay | On |
Serial communication with low side IC | Valid |
Command to reduction solenoid on/off | On |
Low side IC malfunction | Not detected |
ABS reduction solenoid voltage | Less than 4.128 V |
ABS reduction solenoid current | Higher than 0.02 A |
All of the following conditions are met | - |
ABS solenoid power supply relay | On |
Serial communication with low side IC | Valid |
Command to reduction solenoid on/off | On |
Low side IC malfunction | Not detected |
ABS reduction solenoid current | Less than 4.4 A |
All of the following conditions are met | - |
Serial communication with low side IC | Valid |
ABS solenoid power supply relay | On |
Command to reduction solenoid on/off | Off |
ABS reduction solenoid voltage | Higher than 11.29 V |
All of the following conditions are met | - |
Serial communication with low side IC | Valid |
ABS solenoid power supply relay | On |
Command to reduction solenoid on/off | Off |
ABS reduction solenoid voltage | Higher than 4.2 V |
CONFIRMATION DRIVING PATTERN
HINT:
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HINT:
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake booster with master cylinder assembly) or brake actuator assembly, perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".
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PROCEDURE
1. | INSPECT BRAKE ACTUATOR ASSEMBLY |
(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.
*a | Component without harness connected (Brake Actuator Assembly) | - | - |
(b) Disconnect the A54 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 resistance according to the value(s) in the table below.
HINT:
Check the brake actuator assembly when it is cooled down.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
5 (+BS) - 28 (SFRH) | Always | 6.4 to 7.0 Ω |
5 (+BS) - 31 (SFLH) | Always | 6.4 to 7.0 Ω |
5 (+BS) - 30 (SRRH) | Always | 6.4 to 7.0 Ω |
5 (+BS) - 29 (SRLH) | Always | 6.4 to 7.0 Ω |
5 (+BS) - 18 (SFRR) | Always | 5.1 to 5.7 Ω |
5 (+BS) - 15 (SFLR) | Always | 5.1 to 5.7 Ω |
5 (+BS) - 16 (SRRR) | Always | 5.1 to 5.7 Ω |
5 (+BS) - 17 (SRLR) | Always | 5.1 to 5.7 Ω |
NG | REPLACE BRAKE ACTUATOR ASSEMBLY |
|
2. | CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
(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.
(b) Disconnect the A45 skid control ECU (brake booster with master cylinder 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 |
---|---|---|
A45-14 (+BS) - A54-5 (+BS) | Always | Below 1 Ω |
A45-14 (+BS) or A54-5 (+BS) - Body ground | Always | 10 kΩ or higher |
A45-48 (SFRH) - A54-28 (SFRH) | Always | Below 1 Ω |
A45-48 (SFRH) or A54-28 (SFRH) - Body ground | Always | 10 kΩ or higher |
A45-49 (SFLH) - A54-31 (SFLH) | Always | Below 1 Ω |
A45-49 (SFLH) or A54-31 (SFLH) - Body ground | Always | 10 kΩ or higher |
A45-50 (SRRH) - A54-30 (SRRH) | Always | Below 1 Ω |
A45-50 (SRRH) or A54-30 (SRRH) - Body ground | Always | 10 kΩ or higher |
A45-51 (SRLH) - A54-29 (SRLH) | Always | Below 1 Ω |
A45-51 (SRLH) or A54-29 (SRLH) - Body ground | Always | 10 kΩ or higher |
A45-44 (SFRR) - A54-18 (SFRR) | Always | Below 1 Ω |
A45-44 (SFRR) or A54-18 (SFRR) - Body ground | Always | 10 kΩ or higher |
A45-45 (SFLR) - A54-15 (SFLR) | Always | Below 1 Ω |
A45-45 (SFLR) or A54-15 (SFLR) - Body ground | Always | 10 kΩ or higher |
A45-46 (SRRR) - A54-16 (SRRR) | Always | Below 1 Ω |
A45-46 (SRRR) or A54-16 (SRRR) - Body ground | Always | 10 kΩ or higher |
A45-47 (SRLR) - A54-17 (SRLR) | Always | Below 1 Ω |
A45-47 (SRLR) or A54-17 (SRLR) - Body ground | Always | 10 kΩ or higher |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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3. | RECONFIRM DTC |
(a) Reconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.
(b) Reconnect the A54 brake actuator assembly connector.
(c) Clear the DTCs.
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Chassis > ABS/VSC/TRAC > Clear DTCs(d) Turn the power switch off.
(e) Turn the power switch on (IG).
(f) Check if the same DTC is output.
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Chassis > ABS/VSC/TRAC > Trouble Codes Result | Proceed to |
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DTCs C1352, C1353, C1354, C1355, C1356, C1357, C1358 and C1359 are not output. | A |
DTCs C1352, C1353, C1354, C1355, C1356, C1357, C1358 and/or C1359 are output. | B |
A | USE SIMULATION METHOD TO CHECK |
B | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |