DSC HU/Cm Inspection
- Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
- Disconnect the DSC HU/CM connector. (See DSC HU/CM REMOVAL/INSTALLATION .)
- Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
- Attach the tester lead to the DSC HU/CM wiring harness-side connector and inspect voltage, continuity, or resistance according to the Terminal Voltage Table (Reference) on the table.
Terminal Voltage Table (Reference)
TERMINAL VOLTAGE REFERENCE
| Terminal | Signal name | Connected to | Measured item | Measured terminal (measurement condition) | Specification | Inspection item(s) | ||
|---|---|---|---|---|---|---|---|---|
| A | Power supply (solenoid operation) |
Battery | Voltage | Under any condition | B+ |
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| B | Power supply (pump motor operation) |
Battery | Voltage | Under any condition | B+ |
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| C | CAN_H | CAN related module | Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection. | |||||
| D | CAN_L | CAN related module | Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection. | |||||
| E | - | - | - | - | - | - | ||
| F | - | - | - | - | - | - | ||
| G | - | - | - | - | - | - | ||
| H | - | - | - | - | - | - | ||
| I | Power supply (system) | IG1 relay | Voltage | Ignition ON (engine off) | B+ |
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| Ignition off | 1.0 V or less | |||||||
| J | RF ABS wheel-speed sensor (+) | RF ABS wheel-speed sensor | Continuity | DSC HU/CM terminal J-RF ABS wheel-speed sensor terminal A | Continuity detected |
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| K | RF ABS wheel-speed sensor (-) | RF ABS wheel-speed sensor | Continuity | DSC HU/CM terminal K-RF ABS wheel-speed sensor terminal B | Continuity detected |
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| L | RR ABS wheel-speed sensor (-) | RR ABS wheel-speed sensor | Continuity | DSC HU/CM terminal L-RR ABS wheel-speed sensor terminal B | Continuity detected |
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| M | RR ABS wheel-speed sensor (+) | RR ABS wheel-speed sensor | Continuity | DSC HU/CM terminal M-RR ABS wheel-speed sensor terminal A | Continuity detected |
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| N | - | - | - | - | - | - | ||
| O(1) | Brake light | Brake light relay | Voltage | Brake pedal depressed | B+ |
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| Brake pedal released | 1.0 V or less | |||||||
| P | LR ABS wheel-speed sensor (-) | LR ABS wheel-speed sensor | Continuity | DSC HU/CM terminal P-LR ABS wheel-speed sensor terminal B | Continuity detected |
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| Q | - | - | - | - | - | - | ||
| R | LR ABS wheel-speed sensor (+) | LR ABS wheel-speed | sensor | Continuity DSC HU/CM terminal R-LR ABS wheel-speed sensor terminal A | Continuity detected |
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| S | LF ABS wheel-speed sensor (+) | LF ABS wheel-speed sensor | Continuity | DSC HU/CM terminal S-LF ABS wheel-speed sensor terminal A | Continuity detected |
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| T | - | - | - | - | - | - | ||
| U | - | - | - | - | - | - | ||
| V | - | - | - | - | - | - | ||
| W | LF ABS wheel-speed sensor (-) | LF ABS wheel-speed sensor | Continuity | DSC HU/CM terminal W-LF ABS wheel-speed sensor terminal B | Continuity detected |
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| X | - | - | - | - | - | - | ||
| Y | - | - | - | - | - | - | ||
| Z | - | - | - | - | - | - | ||
| AA | - | - | - | - | - | - | ||
| AB | - | - | - | - | - | - | ||
| AC | - | - | - | - | - | - | ||
| AD | - | - | - | - | - | - | ||
| AE | - | - | - | - | - | - | ||
| AF | - | - | - | - | - | - | ||
| AG | - | - | - | - | - | - | ||
| AH | - | - | - | - | - | - | ||
| AI | - | - | - | - | - | - | ||
| AJ | - | - | - | - | - | - | ||
| AK | Ground | Ground point | Continuity | DSC HU/CM terminal AK- ground point | Continuity detected |
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| AL | Ground | Ground point | Continuity | DSC HU/CM terminal AL-ground point | Continuity detected |
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