ABS, ABS/TCS ON-BOARD DIAGNOSIS

BME040243000202

On-Board Diagnostic (OBD) Test Description

• The OBD test inspects the integrity and function of the ABS/TCS and outputs the results when requested by the specific tests.
• On-board diagnostic test also:
- Provides a quick inspection of the ABS.
- Is usually performed at the start of each diagnostic procedure.
- Provides verification after repairs to ensure that no other faults occurred during service.
• The OBD test is divided into three tests:
- Read/clear diagnostic results, PID monitor and record and active command modes.

Read/clear diagnostic results

• This function allows you to read or clear DTCs in the ABS/TCS HU/CM or ABS HU/CM memory.

PID/data monitor and record

• This function allows you to access certain data values, input signals, calculated values, and system status information.

Active command modes

• This function allows you to control devices through WDS or equivalent.

DTCs Reading Procedure

Using WDS or equivalent

1. Connect WDS or equivalent to the vehicle DLC-2 16-pin connector located on the left side of the steering column.

2. Retrieve DTC by WDS or equivalent.

Without using WDS or equivalent

1. Connect the TBS terminal at DLC to body ground using a jumper wire.

2. Turn ignition key to ON (engine off).

3. After the ABS warning light illuminates for 3 seconds the ABS warning light indicates DTCs.

4. After completion of repairs, clear DTCs.

Clearing DTCs Procedure

Using WDS or equivalent

1. After repairs have been made, perform the DTCs reading procedure.

2. Erase DTC by WDS or equivalent.

3. Ensure that the customer's concern has been resolved.

Note
• After repairing the ABS wheel-speed sensor or replacing ABS/TCS HU/CM or ABS HU/CM, the ABS warning light may not go off when ignition key is turned ON. In this case, start engine and drive the vehicle at a speed of more than 10 km/h {6.2 mph} until the ABS warning light goes off.

Without using WDS or equivalent

Caution
• Connecting the wrong DLC terminals may possibly cause a malfunction. Carefully connect the specified terminals only.

1. Connect the TBS terminal at the DLC to body ground using a jumper wire.

2. Turn the ignition key to ON (engine off).

3. Output all stored DTCs.

4. After verifying that the first code is repeated, depress the brake pedal 10 times at intervals of less than one second. (1 sec.)

5. Turn the ignition key to OFF and disconnect the jumper wire.

Note
• DTCs cannot be cleared if the following occur:
- Intervals of depressing the brake pedal exceed one second. (1 sec.)
- The brake switch has failed.
• After repairing the ABS wheel-speed sensor or replacing ABS/TCS HU/CM or ABS HU/CM, the ABS warning light may not go off when ignition key is turned ON. In this case, start engine and drive the vehicle at a speed of more than 10 km/h {6.2 mph} until the ABS and/or BRAKE system warning light goes off.

PID/Data Monitor and Record Procedure

1. Connect WDS or equivalent to the vehicle DLC-2 16-pin connector located on the left side of the steering column.

2. Access and monitor PIDs by WDS or equivalent.

Active Command Modes Procedure

Note
• When driving the ABS motor and each valve forcibly, turn ABSVLVRLY on, and then each command on. ABSVLVRLY regulates the power supply for the ABS motor and eight valves.

1. Connect WDS or equivalent to the vehicle DLC-2 16-pin connector located on the left side of the steering column.

2. Turn the ignition switch to ON (Engine OFF) or start engine.

3. Activate active command modes by WDS or equivalent.

DTC Table

DTC

ABS warning light flashing pattern

Diagnosis system component

Page

WDS or equivalent

ABS warning light

B1318
63

ABS HU/CM power supply
B1342
61

ABS HU/CM (CM)
C1095
54

ABS motor, motor relay
C1096
53

ABS motor, motor relay
C1140
30

ABS HU/CM (pump)
C1145
11

Right front ABS wheel-speed sensor
C1148
41

Right front ABS wheel-speed sensor/sensor rotor
C1155
12

Left front ABS wheel-speed sensor
C1158
42

Left front ABS wheel-speed sensor/sensor rotor
C1165
13

Right rear ABS wheel-speed sensor
C1168
43

Right rear ABS wheel-speed sensor/sensor rotor
C1175
14

Left rear wheel-speed sensor
C1178
44

Left rear ABS wheel-speed sensor/sensor rotor
C1186
51

Fail-safe relay
C1194
24

Left front ABS pressure reduction solenoid valve
C1198
25

Left front ABS pressure retention solenoid valve
C1210
22

Right front ABS pressure reduction solenoid valve
C1214
23

Right front ABS pressure retention solenoid valve
C1233
46

Left front ABS wheel-speed sensor/sensor rotor
C1234
45

Right front ABS wheel-speed sensor/sensor rotor
C1235
47

Right rear ABS wheel-speed sensor/sensor rotor
C1236
48

Left rear ABS wheel-speed sensor/sensor rotor
C1242
28

Left rear ABS pressure reduction solenoid valve
C1246
26

Right rear ABS pressure reduction solenoid valve
C1250
29

Left rear ABS pressure retention solenoid valve
C1254
27

Right rear ABS pressure retention solenoid valve
C1266
52

Fail-safe relay
C1510
32

Right front solenoid valve, ABS motor, right front ABS wheel-speed sensor/sensor rotor
C1511
33

Left front solenoid valve, ABS motor, left front ABS wheel-speed sensor/sensor rotor
C1512
34

Right rear solenoid valve, ABS motor, Right rear ABS wheel-speed sensor/sensor rotor
C1513
35

Left rear solenoid valve, ABS motor, left rear ABS wheel-speed sensor/sensor rotor
C1117*1, 2
17*1, 2

RPM input circuit failure
C1118*1
82*1

Traction control indicated torque reduction circuit failure
C1119*1, 2
83*1, 2

Traction control actual torque reduction circuit failure
U2021*1
87*1

Invalid/fault data received (non SCP)
C1508*2
92*2

TCS control
U0100*2
86*2

CAN communication system
U0073*2
85*2

CAN communication system

*1 :
With TCS (L3, AJ)
*2 :
With TCS (MZR-CD (RF Turbo))

PID/DATA Monitor Table

PID Name

(Definition)

Unit/Condition

Condition/Specification

Action

ABS HU/CM terminal

ABS LAMP
(ABS warning light output state)
ON/OFF
• ABS warning light is illuminated: ON
• ABS warning light is illuminated: OFF
Inspect ABS warning light.
W
ABSLF I
(Left front ABS pressure retention solenoid valve output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(solenoid valve is activated/deactivated)
• Not ABS and/or EBD control: OFF
(solenoid valve is deactivated)
Internal fault of ABS HU/CM
Replace ABS HU/CM.
-
ABSLF O
(Left front ABS pressure reduction solenoid valve output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(solenoid valve is activated/deactivated)
• Not ABS and/or EBD control: OFF
(solenoid valve is deactivated)
Internal fault of ABS HU/CM
Replace ABS HU/CM.
-
ABSLR I
(Left rear ABS pressure retention solenoid valve output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(solenoid valve is activated/deactivated)
• Not ABS and/or EBD control: OFF
(solenoid valve is deactivated)
Internal fault of ABS HU/CM
Replace ABS HU/CM.
-
ABSLR O
(Left rear ABS pressure reduction solenoid valve output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(solenoid valve is activated/deactivated)
• Not ABS and/or EBD control: OFF
(solenoid valve is deactivated)
Internal fault of ABS HU/CM
Replace ABS HU/CM.
-
ABS RF I
(Right front ABS pressure retention solenoid valve output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(solenoid valve is activated/deactivated)
• Not ABS and/or EBD control: OFF
(solenoid valve is deactivated)
Internal fault of ABS HU/CM
Replace ABS HU/CM.
-
ABSRF O
(Right front ABS pressure reduction solenoid valve output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(solenoid valve is activated/deactivated)
• Not ABS and/or EBD control: OFF
(solenoid valve is deactivated)
Internal fault of ABS HU/CM
Replace ABS HU/CM.
-
ABSRR I
(Right rear ABS pressure retention solenoid valve output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(solenoid valve is activated/deactivated)
• Not ABS and/or EBD control: OFF
(solenoid valve is deactivated)
Internal fault of ABS HU/CM
Replace ABS HU/CM.
-
ABSRR O
(Right rear ABS pressure reduction solenoid valve output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(solenoid valve is activated/deactivated)
• Not ABS and/or EBD control: OFF
(solenoid valve is deactivated)
Internal fault of ABS HU/CM
Replace ABS HU/CM.
-
BOO ABS
(Brake pedal switch input)
ON/OFF
• Brake pedal is depressed: ON
• Brake pedal is released: OFF
Inspect brake switch.
Y
BRAKE LMP
(BRAKE warning light output state)
ON/OFF
• BRAKE system warning light is illuminated: ON
• BRAKE system warning light is not illuminated: OFF
Inspect BRAKE system warning light.
W
LF WSPD
(Left front ABS wheel-speed sensor input)
KPH/MPH
• Vehicle is stopped: 0 KPH {0 MPH}
• Indicate vehicle speed
Inspect ABS wheel-speed sensor/sensor rotor.
I, E
LR WSPD
(Left rear ABS wheel-speed sensor input)
KPH/MPH
• Vehicle is stopped: 0 KPH {0 MPH}
• Indicate vehicle speed
Inspect ABS wheel-speed sensor/sensor rotor.
C, F
ABSPMPRLY
(ABS motor relay output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(ABS motor is activated/deactivated)
• Not ABS and/or EBD control: OFF
(ABS motor is deactivated)
Inspect ABS HU/CM connector and ABS HU/CM.
-
PMP MOTOR
(ABS motor output state)
ON/OFF
• During ABS and/or EBD control: ON/OFF
(ABS motor is activated/deactivated)
• Not ABS and/or EBD control: OFF
(ABS motor is deactivated)
Inspect ABS HU/CM connector and ABS HU/CM.
-
RF WSPD
(Right front ABS wheel-speed sensor input)
KPH/MPH
• Vehicle is stopped: 0 KPH {0 MPH}
• indicate vehicle speed
Inspect ABS wheel-speed sensor/sensor rotor.
D, G
RR WSPD
(Right rear ABS wheel-speed sensor input)
KPH/MPH
• Vehicle is stopped: 0 KPH {0 MPH}
• indicate vehicle speed
Inspect ABS wheel-speed sensor/sensor rotor.
A, B
ABSVLVRLY
(Fail-safe relay output state)
ON/OFF
• Ignition switch is at ON: ON
• Other condition (Power supply circuit is open circuit): OFF
Inspect ABS HU/CM connector and ABS HU/CM
-
RPM*
(Engine speed)
RPM
• Engine stopped:
• Engine idling:

650-750 RPM

Inspect PCM.
S (L3, AJ)
- (MZR-CD (RF Turbo))
TRAC SW*
(TCS OFF switch)
ON/OFF
• TCS OFF switch is depressed: ON
• TCS OFF switch is released: OFF
Inspect TCS OFF switch.
P
ABS VOLT
(System battery voltage value)
V
• Ignition key ON: B+
• Idle: B+
Inspect power supply circuit.
Z

* :
with TCS

Active Command Modes Table

Command Name

Definition

Operation

Note

PMP MOTOR
ABS motor
ON/OFF
Ignition key at ON
(engine OFF), and driving
RF OUTLET
Right front ABS pressure reduction solenoid valve
ON/OFF
RF INLET
Right front ABS pressure retention solenoid valve
ON/OFF
LF OUTLET
Left front ABS pressure reduction solenoid valve
ON/OFF
LF INLET
Left front ABS pressure retention solenoid valve
ON/OFF
RR OUTLET
Right rear ABS pressure reduction solenoid valve
ON/OFF
RR INLET
Right rear ABS pressure retention solenoid valve
ON/OFF
LR OUTLET
Left rear ABS pressure reduction solenoid valve
ON/OFF
LR INLET
Left rear ABS pressure retention solenoid valve
ON/OFF
ABSVLVRLY
Fail-safe relay
ON/OFF
CHK TRAC ABS*
Check traction control indicator
ON/OFF
TRAC OFF*
Traction control off indicator
ON/OFF
ENG TQR*
Engine torque reduction signal output
Nm
VS OUTPUT
Vehicle speed signal
KPH/MPH

* :
For TCS
Note
• When operating the ABS motor and each valve forcibly, turn ABSVLVRLY on, and then each command on, ABSVLVRLY regulates the power supply for the ABS motor and eight valves.