#
ABS/TCS HU/CM INSPECTION

BME041467650202

1. Remove the battery and battery tray.

2. Connect the SST between the ABS/TCS HU/CM and harness connector with the ignition switch off.

3. Attach the tester leads to the SST to inspect voltage by referring to the table below.

  Caution

  • In the event that the vehicle is to be inspected while it is being driven, make sure that the SST harness does not interfere with parts in the engine room.

## Terminal Voltage Table (reference value)

(Ignition switch is at ON, and connector is connected unless indicated otherwise)

Terminal | Signal | Connected to | Test condition | Voltage (V) | Action
--- | --- | --- | --- | --- | ---
A B | RR wheel-speed | RR wheel-speed sensor | Vehicle is stopped | 0 (AC) | • Inspect harness (wheel-speed sensor - ABS/TCS HU/CM). • Inspect wheel-speed sensor. (See FRONT/REAR ABS WHEEL-SPEED SENSOR INSPECTION) • Inspect related harness.
Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference))
C F | LR wheel-speed | LR wheel-speed sensor | Vehicle is stopped | 0 (AC)
Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference))
D G | RF wheel-speed | RF wheel-speed sensor | Vehicle is stopped | 0 (AC)
Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference))
E I | LF wheel-speed | LF wheel-speed sensor | Vehicle is stopped | 0 (AC)
Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference))
H | - | - | - | - | -
J | L3, AJ | - | - | - | - | -
MZR-CD (RF Turbo) | TCS OFF | TCS-OFF light | Light illuminated | Below 1.0 | • Inspect harness, fuse (battery-TCS-OFF light - ABS/TCS HU/CM). • Inspect related harness.
Light not illuminated | 10-12
L | L3, AJ | Torque down inhibition | PCM | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference)) | • Inspect harness (ABS/TCS HU/CM - PCM). • Inspect PCM. (See PCM INSPECTION [L3]) (See PCM INSPECTION [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)) (See PCM INSPECTION [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)))
(See PCM INSPECTION [MZR-CD (RF Turbo)])
• Inspect related harness.
MZR-CD (RF Turbo) | - | - | - | - | -
M | TCS indicator | TCS indicator light | Light illuminated | Below 1.0 | • Inspect harness, fuse (battery-TCS indicator light - ABS/TCS HU/CM). • Inspect related harness.
Light not illuminated | 10-12
O | L3, AJ | TCS OFF | TCS-OFF light | Light illuminated | Below 1.0 | • Inspect harness, fuse (battery-TCS-OFF light - ABS/TCS HU/CM). • Inspect related harness.
Light not illuminated | 10-12
MZR-CD (RF Turbo) | CAN_H | DLC-2 (CAN_H) | It cannot be determined with terminal voltage whether the condition is good or bad because advanced function diagnostic output is performed with serial communication. Inspect with service codes. | • Inspect related harness.
P | TCS-OFF switch | TCS-OFF switch | When switch is pressed | 0 | • Inspect harness, fuse (battery-TCS-OFF switch - ABS/TCS HU/CM). • Inspect related harness.
When switch is not pressed | 10-12
Q | L3, AJ | Vehicle speed output | Instrument cluster | Vehicle is stopped. | 0 | • Inspect harness (ABS/TCS HU/CM - Instrument cluster). • Instrument cluster. • Inspect front wheel- speed sensor. (See FRONT/REAR ABS WHEEL-SPEED SENSOR INSPECTION) • Inspect related harness.
Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference))
MZR-CD (RF Turbo) | - | - | - | - | -
R | L3, AJ | Torque down request | PCM | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference)) | • Inspect ABS/TCS HU/CM. • Inspect related harness.
MZR-CD (RF Turbo) | CAN_L | DLC-2 (CAN_L) | It cannot be determined with terminal voltage whether the condition is good or bad because advanced function diagnostic output is performed with serial communication. Inspect with service codes. | • Inspect related harness.
S | L3, AJ | Engine speed | PCM | Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference)) | • Inspect harness ABS/TCS HU/CM - PCM). • Inspect PCM. (See PCM INSPECTION [L3]) (See PCM INSPECTION [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)) (See PCM INSPECTION [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)))
(See PCM INSPECTION [MZR-CD (RF Turbo)])
• Inspect related harness.
MZR-CD (RF Turbo) | Vehicle speed output | Instrument cluster | Vehicle is stopped. | 0 | • Inspect harness (ABS/TCS HU/CM - Instrument cluster). • Instrument cluster. • Inspect front wheel- speed sensor. (See FRONT/REAR ABS WHEEL-SPEED SENSOR INSPECTION) • Inspect related harness.
Inspect using the wave profile. (See Inspection Using An Oscilloscope (Reference))
T | OBD | KLN terminal of DLC | It cannot be determined with terminal voltage whether the condition is good or bad because advanced function diagnostic output is performed with serial communication. Inspect with service codes. | • Inspect harness, fuse (battery - ABS/TCS HU/CM-KLN terminal). • Inspect related harness.
U*1 | - | Check connector | - | No need to check | -
V | OBD | TBS terminal of DLC-2 | - | 10-14 | • Inspect harness (battery-ABS/TCS HU/CM-TBS terminal). • Inspect related harness.
W | ABS warning light | ABS warning light | Illuminated | 1.5 min. | • Inspect harness, fuse (battery-ABS warning light - ABS/TCS HU/CM). • Inspect related harness.
Not illuminated | 0.5 max.
X | Brake system warning light | Brake system warning light | Illuminated | 1.5 min. | • Inspect harness, fuse (battery-Brake system warning light - ABS/TCS HU/CM). • Inspect related harness.
Not illuminated | 0.5 max.
Y | Brake switch | Brake switch | Brake pedal is depressed | B+ | • Inspect harness, fuse (battery-brake switch-ABS/TCS HU/CM). • Inspect related harness.
Brake pedal is released | 0.5 max.
Z | Battery | Ignition switch | - | B+ | • Inspect harness, fuse (battery-IG SW-ABS/TCS HU/CM). • Inspect related harness.
AA | L3, AJ | Ground | Ground | - | Below 1.0 | • Inspect harness (ABS/TCS HU/CM-ground point). • Inspect related harness.
MZR-CD (RF Turbo) | Battery (Solenoid valve) | Battery | - | B+ | • Inspect harness, fuse (battery-ABS/TCS HU/CM). • Inspect related harness.
AB | Battery (ABS motor) | Battery | - | B+ | • Inspect harness, fuse (battery-ABS/TCS HU/CM). • Inspect related harness.
AC | L3, AJ | Battery (Solenoid valve) | Battery | - | B+ | • Inspect harness, fuse (battery-ABS/TCS HU/CM). • Inspect related harness.
MZR-CD (RF Turbo) | Ground | Ground | - | Below 1.0 | • Inspect harness (ABS/TCS HU/CM-ground point). • Inspect related harness.
AD | Ground | Ground | - | Below 1.0 | • Inspect harness (ABS/TCS HU/CM-ground point). • Inspect related harness.

  *1 :
Used for vehicle manufacturing, not used for ABS/TCS.

## Inspection Using An Oscilloscope (Reference)

### Wheel speed

  • ABS/TCS HU/CM terminal:
  RF: G (+) - D (-)
  RR: A (+) - B (-)
  LF: I (+) - E (-)
  LR: C (+) - F (-)
  • Oscilloscope setting: 1 V/DIV (Y), 2 ms/DIV (X)
  • Vehicle condition: Driving 30 km/h [18.6 mph]

  Note

  • As vehicle speed increases, period of wave shortens.
  • If malfunctioning in the sensor rotor, wave profile will warp.

### Torque down inhibition (L3, AJ)

  • ABS/TCS HU/CM terminal: L (+) - AA (-)
  • Oscilloscope setting: 1 V/DIV (Y), 10 ms/DIV (X)
  • Vehicle condition: Idle after warm-up (Engine speed at approximately 650 rpm)

### Torque down request (L3, AJ)

  • ABS/TCS HU/CM terminal: R (+) - AA (-)
  • Oscilloscope setting: 1 V/DIV (Y), 5 ms/DIV (X)
  • Vehicle condition: Idle after warm-up (Engine speed at approximately 650 rpm)

### Vehicle speed output

  • ABS/TCS HU/CM terminal: Q (+) - AA (-)(L3, AJ)
  ABS/TCS HU/CM terminal: S (+) - AC (-)(MZR-CD (RF Turbo))
  • Oscilloscope setting: 2 V/DIV (Y), 25 ms/DIV (X)
  • Vehicle condition: Driving 25 km/h [15.5 mph]

  Note

  • As vehicle speed increases, period of wave will shortens.

### Engine speed (L3, AJ)

  • ABS/TCS HU/CM terminal: S (+) - AA (-)
  • Oscilloscope setting: 2 V/DIV (Y), 25 ms/DIV (X)
  • Vehicle condition: Idle after warm-up (Engine speed at approximately 650 rpm)