Abs HU/Cm Inspection
- Disconnect the ABS HU/CM connector. (See ABS HU/CM REMOVAL/INSTALLATION .)
- Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [13B-MSP] .)
- Attach the tester lead to the ABS HU/CM harness side connector, then inspect voltage, continuity or resistance according to the standard (reference value) on the table.
Standard (Reference Value)
TERMINALS REFERENCE
| Terminal | Signal name | Connected to | Measured item | Measured terminal (measured condition) | Standard | Inspection item(s) |
|---|---|---|---|---|---|---|
| A | RR wheel-speed sensor (signal) | RR ABS wheel-speed sensor | Continuity | A-RR ABS wheel-speed sensor connector terminal B | Continuity detected |
|
| B | RR wheel-speed sensor (ground) | RR ABS wheel-speed sensor | Continuity | B-RR ABS wheel-speed sensor connector terminal A | Continuity detected |
|
| C | LR wheel-speed sensor (signal) | LR ABS wheel-speed sensor | Continuity | C-LR ABS wheel-speed sensor connector terminal B | Continuity detected |
|
| D | RF wheel-speed sensor (ground) | RF ABS wheel-speed sensor | Continuity | D-RF ABS wheel-speed sensor connector terminal B | Continuity detected |
|
| E | LF wheel-speed sensor (ground) | LF ABS wheel-speed sensor | Continuity | E-LF ABS wheel-speed sensor connector terminal B | Continuity detected |
|
| F | LR wheel-speed sensor (ground) | LR ABS wheel-speed sensor | Continuity | F-LR ABS wheel-speed sensor connector terminal A | Continuity detected |
|
| G | RF wheel-speed sensor (signal) | RF ABS wheel-speed sensor | Continuity | G-RF ABS wheel-speed sensor connector terminal A | Continuity detected |
|
| H | - | - | - | - | - | - |
| I | LF wheel-speed sensor (single) | LF ABS wheel-speed sensor | Continuity | I-LF ABS wheel-speed sensor connector terminal A | Continuity detected |
|
| J | - | - | - | - | - | - |
| K | - | - | - | - | - | - |
| L | - | - | - | - | - | - |
| M | - | - | - | - | - | - |
| N | - | - | - | - | - | - |
| O | CAN_H | DLC-2 (CAN_H) | Continuity | 0-DLC-2 terminal CAN_H | Continuity detected |
|
| P | - | - | - | - | - | - |
| Q | - | - | - | - | - | - |
| R | CAN_L | DLC-2 (CAN_L) | Continuity | R-DLC-2 terminal CAN_L | Continuity detected |
|
| S | - | - | - | - | - | - |
| T | - | - | - | - | - | - |
| U | - | - | - | - | - | - |
| V | Vehicle speed output | Audio unit | Continuity | V-audio unit | Continuity detected |
|
| Car-navigation unit | V-car-navigation unit |
|
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| Position memory control module | V-position memory control module |
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| Auto light/wiper control module | V-auto light/wiper control module |
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| Climate control unit | V-climate control unit |
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| Auto leveling control module | V-auto leveling control module |
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| W | - | - | - | - | - | - |
| X | KLN | DLC-2 (KLN) | Continuity | X-DLC-2 terminal KLN | Continuity detected |
|
| Y | Brake switch | Brake switch | Voltage | Y-AC (Brake pedal depressed with ignition switch at ON) | B+ |
|
| Y-AC (Brake pedal not depressed with ignition switch at ON) | 1 V or less | |||||
| Z | Power supply (system) | Ignition switch | Voltage | Ignition switch at ON | B+ |
|
| Ignition switch is off. | 1 V or less | - | ||||
| AA | Power supply (solenoid) | Battery | Voltage | Under any condition | B+ |
|
| AB | Power supply (ABS motor operation) | Battery | Voltage | Under any condition | B+ |
|
| AC | Ground (ABS system) | Ground point | Continuity | AC-ground point | Continuity detected |
|
| AD | Ground (ABS motor) | Ground point | Continuity | AD-ground point | Continuity detected |
|