Lexus NX manuals

Lexus NX: SLA Linear Solenoid (C1211,C1212,C1225-C1228,C1352,C1353,C1356,C1357)

Lexus NX Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System / SLA Linear Solenoid (C1211,C1212,C1225-C1228,C1352,C1353,C1356,C1357)

DESCRIPTION

Each solenoid adjusts pressure which affects each wheel cylinder according to signals from the skid control ECU (brake booster with master cylinder assembly) and controls the vehicle.

The master cut solenoid is closed and blocks the regulator pressure from the electronically controlled brake system control pressure when the system is normal. The master cut solenoid is open and sends the master cylinder and regulator hydraulic pressure to the non-assisted brake wheel cylinders during fail-safe operation during a system malfunction.

HINT:

If the supply voltage decreases, a drop in current may cause DTCs to be stored.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1211

SLA Linear Solenoid

21

22

23

24
  • INF Code: 21
    • Excess current is applied for 0.05 seconds or more.
  • INF Code: 22
    • An open is detected for 0.05 seconds or more while the solenoid is OFF.
  • INF Code: 23
    • An open is detected for 0.05 seconds or more while the solenoid is ON.
  • INF Code: 24
    • A short to +B or voltage leak is detected for 0.05 seconds.
  • INF Code: 21, 22, 24
    • Brake booster with master cylinder assembly
  • INF Code: 23
    • Supply voltage reduced
    • Brake booster with master cylinder assembly

-

C1212

SLR Linear Solenoid

31

32

33

34
  • INF Code: 31
    • Excess current is applied for 0.05 seconds or more.
  • INF Code: 32
    • An open is detected for 0.05 seconds or more while the solenoid is OFF.
  • INF Code: 33
    • An open is detected for 0.05 seconds or more while the solenoid is ON.
  • INF Code: 34
    • A short to +B or voltage leak is detected for 0.05 seconds.
  • INF Code: 31, 32, 34
    • Brake booster with master cylinder assembly
  • INF Code: 33
    • Supply voltage reduced
    • Brake booster with master cylinder assembly

-

C1225

SA1 Solenoid Circuit

41

42

43

44
  • INF Code: 41
    • Excess current is applied for 0.05 seconds or more.
  • INF Code: 42
    • An open is detected for 0.05 seconds or more while the solenoid is OFF.
  • INF Code: 43
    • An open is detected for 0.05 seconds or more while the solenoid is ON.
  • INF Code: 44
    • A short to +B or voltage leak is detected for 0.05 seconds.
  • INF Code: 41, 42, 44
    • Brake booster with master cylinder assembly
  • INF Code: 43
    • Supply voltage reduced
    • Brake booster with master cylinder assembly

-

C1226

SA2 Solenoid Circuit

51

52

53

54
  • INF Code: 51
    • Excess current is applied for 0.05 seconds or more.
  • INF Code: 52
    • An open is detected for 0.05 seconds or more while the solenoid is OFF.
  • INF Code: 53
    • An open is detected for 0.05 seconds or more while the solenoid is ON.
  • INF Code: 54
    • A short to +B or voltage leak is detected for 0.05 seconds.
  • INF Code: 51, 52, 54
    • Brake booster with master cylinder assembly
  • INF Code: 53
    • Supply voltage reduced
    • Brake booster with master cylinder assembly

-

C1227

SA3 Solenoid Circuit

61

62

63

64
  • INF Code: 61
    • Excess current is applied for 0.05 seconds or more.
  • INF Code: 62
    • An open is detected for 0.05 seconds or more while the solenoid is OFF.
  • INF Code: 63
    • An open is detected for 0.05 seconds or more while the solenoid is ON.
  • INF Code: 64
    • A short to +B or voltage leak is detected for 0.05 seconds.
  • INF Code: 61, 62, 64
    • Brake booster with master cylinder assembly
  • INF Code: 63
    • Supply voltage reduced
    • Brake booster with master cylinder assembly

-

C1228

STR Solenoid Circuit

71

72

73

74
  • INF Code: 71
    • Excess current is applied for 0.05 seconds or more.
  • INF Code: 72
    • An open is detected for 0.05 seconds or more while the solenoid is OFF.
  • INF Code: 73
    • An open is detected for 0.05 seconds or more while the solenoid is ON.
  • INF Code: 74
    • A short to +B or voltage leak is detected for 0.05 seconds.
  • INF Code: 71, 72, 74
    • Brake booster with master cylinder assembly
  • INF Code: 73
    • Supply voltage reduced
    • Brake booster with master cylinder assembly

-

C1352

FR Solenoid

11

12

With the solenoid relay contact on, an open or short in solenoid circuit continues for 0.05 seconds or more.

Brake booster with master cylinder assembly

-

C1353

RR Solenoid

15

16

With the solenoid relay contact on, an open or short in solenoid circuit continues for 0.05 seconds or more.

Brake booster with master cylinder assembly

-

C1356

FL Solenoid

13

14

With the solenoid relay contact on, an open or short in solenoid circuit continues for 0.05 seconds or more.

Brake booster with master cylinder assembly

-

C1357

RL Solenoid

17

18

With the solenoid relay contact on, an open or short in solenoid circuit continues for 0.05 seconds or more.

Brake booster with master cylinder assembly

-

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake booster with master cylinder assembly) or brake actuator (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.

Click here

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (IG).

(d) Check if the same DTC is output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

HINT:

If a DTC for undervoltage is output, first troubleshoot the power source system.

Result

Proceed to

DTCs C1211, C1212, C1225, C1226, C1227, C1228, C1352, C1353, C1356 and C1357 are not output.

A

Undervoltage DTC C1241 is output.

B

DTCs C1211, C1212, C1225, C1226, C1227, C1228, C1352, C1353, C1356 and/or C1357 are output.

C
A

USE SIMULATION METHOD TO CHECK

B

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

C

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

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 Terminals Of Ecu

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 Diagnostic Trouble Code Chart

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