DSC Control Inspection
- Perform "Preparation".
- Connect the WDS or equivalent to the DLC-2.
- Set up an active command mode inspection according to the combination of commands below. CAUTION: To protect the DSC HU/CM, the solenoid valve and the pump motor used during active command mode stay on for only 10 s or less each time they are switched on. DSC CONTROL INSPECTION REFERENCE Command name Inspected wheels Understeer control inhibited Oversteer control inhibited LF RF LR RR V_TRC_L ON OFF ON V_TRC_R OFF ON OFF V_STB_L OFF V_STB_R LF_INLET OFF OFF OFF ON LF_OUTLET OFF LR_INLET ON LR_OUTLET OFF RF_INLET ON RF_OUTLET OFF RR_INLET ON RR_OUTLET OFF PMP_MOTOR ON
- Send the command while rotating the wheel being inspected by hand in a forward direction.
- Confirm that the wheel does not rotate easily while a DSC HU/CM operation click sound is heard. Performing the inspection above determines the following: The DSC HU/CM brake lines are normal. The DSC HU/CM hydraulic system is not significantly abnormal (including DSC HU/CM). The DSC HU/CM internal electrical parts (solenoid, motor and other parts) are normal. The DSC unit and DSC HU/CM output system wiring harnesses (solenoid valve, relay system) are normal. However, the following items cannot be verified. Malfunction with intermittent occurrence of the above items Malfunction of DSC HU/CM input system wiring harnesses and parts Extremely small leaks in the DSC HU/CM internal hydraulic system
DSC HU/CM INSPECTION
- Disconnect the DSC HU/CM connector. (See «DSC HU/CM REMOVAL/INSTALLATION»(ref-244445-S08987664242006092400000) .)
- Connect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [LF]»(ref-244448-S25513985422006092400000) .)
- Attach the tester lead to the DSC HU/CM harness side connector, then inspect voltage, continuity or resistance according to the standard (reference value) on «REFERENCE VALUE TABLE»(ref-244445-S26737976162006092400000) .
Scheme 3
| Terminal | Signal name | Connected to | Measured item | Measured terminal (measured condition) | Standard | Inspection item(s) |
|---|---|---|---|---|---|---|
| A | Ground (ABS motor) | Ground point | Continuity | A-ground point | Continuity detected | Wiring harness (A-ground point) |
| B | Power supply (ABS motor operation) | Battery | Voltage | Under any condition | B+ | Wiring harness (B-battery) |
| C | Power supply (solenoid operation) | Battery | Voltage | Under any condition | B+ | Wiring harness (C-battery) |
| D | Ground (DSC system) | Ground point | Continuity | D-ground point | Continuity detected | Wiring harness (D-ground point) |
| E | LF wheel-speed sensor (ground) | LF ABS wheel-speed sensor | Continuity | E-LF ABS wheel-speed sensor connector terminal B | Continuity detected | Wiring harness (E-LF ABS wheel-speed sensor connector terminal B) |
| F | LF wheel-speed sensor (single) | LF ABS wheel-speed sensor | Continuity | F-LF ABS wheel-speed sensor connector terminal A | Continuity detected | Wiring harness (F-LF ABS wheel-speed sensor connector terminal A) |
| G | LR wheel-speed sensor (signal) | LR ABS wheel-speed sensor | Continuity | G-LR ABS wheel-speed sensor connector terminal A | Continuity detected | Wiring harness (G-LR ABS wheel-speed sensor connector terminal A) |
| H | LR wheel-speed sensor (ground) | LR ABS wheel-speed sensor | Continuity | H-LR ABS wheel-speed sensor connector terminal B | Continuity detected | Wiring harness (H-LR ABS wheel-speed sensor connector terminal B) |
| 1 | RR wheel-speed (signal) | RR ABS wheel-speed sensor | Continuity | I-RR ABS wheel-speed sensor connector terminal A | Continuity detected | Wiring harness (I-RR ABS wheel-speed sensor connector terminal A) |
| J | Power supply (system) | Ignition switch | Voltage | Ignition switch at ON | B+ | Wiring harness (J-ignition switch) |
| Ignition switch is off. | 1 V or less | |||||
| K | ||||||
| L | RR wheel-speed sensor (ground) | RR ABS wheel-speed sensor | Continuity | L-RR ABS wheel-speed sensor connector terminal B | Continuity detected | Wiring harness (L-RR ABS wheel-speed sensor connector terminal B) |
| M | RF wheel-speed sensor (signal) | RF ABS wheel-speed sensor | Continuity | M-RF ABS wheel-speed sensor connector terminal A | Continuity detected | Wiring harness (M-RF ABS wheel-speed sensor connector terminal A) |
| N | Brake switch | Brake switch | Voltage | N-ground point (Brake pedal depressed) | B+ | Wiring harness (N-brake switch) Brake switch |
| N-ground point (Brake pedal not depressed) | 1 V or less | |||||
| O | RF wheel-speed sensor (ground) | RF ABS wheel-speed sensor | Continuity | O-RF ABS wheel-speed sensor connector terminal B | Continuity detected | Wiring harness (O-RF ABS wheel-speed sensor connector terminal B) |
| P | DSC OFF switch | DSC OFF switch | Continuity | P-DSC OFF switch connector terminal A | Continuity detected | Wiring harness (P-DSC OFF switch connector terminal A) |
| Q | ||||||
| R | ||||||
| S | ||||||
| T | ||||||
| U | ||||||
| V | ||||||
| W | CAN_L | DLC-2 (CAN_L) | Continuity | W-DLC-2 terminal CAN_L | Continuity detected | Wiring harness (W-DLC-2 terminal CAN_L) |
| X | CAN_H | DLC-2 (CAN_H) | Continuity | X-DLC-2 terminal CAN_H | Continuity detected | Wiring harness (X-DLC-2 terminal CAN_H) |
| Y | Ground (combined sensor) | Combined sensor | Continuity | Y-combined sensor connector terminal F | Continuity detected | Wiring harness (Y-combined sensor connector terminal F) |
| Z | ||||||
| AA | Yaw rate (signal) | Combined sensor | Continuity | AA-combined sensor connector terminal B | Continuity detected | Wiring harness (AA-combined sensor connector terminal B) |
| AB | Yaw rate (test signal) | Combined sensor | Continuity | AB-combined sensor connector terminal C | Continuity detected | Wiring harness (AB-combined sensor connector terminal C) |
| AC | ||||||
| AD | ||||||
| AE | Yaw rate (reference signal) | Combined sensor | Continuity | AE-combined sensor connector terminal A | Continuity detected | Wiring harness (AE-combined sensor connector terminal A) |
| AF | ||||||
| AG | ||||||
| AH | ||||||
| AI | Lateral-G (signal) | Combined sensor | Continuity | AI-combined sensor connector terminal D | Continuity detected | Wiring harness (AI-combined sensor connector terminal D) |
| AJ | ||||||
| AK | ||||||
| AL | ||||||
| AM | ||||||
| AN | ||||||
| AO | ||||||
| AP | ||||||
| AQ | ||||||
| AR | ||||||
| AS | ||||||
| AT |
STANDARD REFERENCE VALUE TABLE
FRONT ABS WHEEL-SPEED SENSOR INSPECTION
- Inspect the front ABS wheel-speed sensor in the same order of vehicles with ABS. (See «FRONT ABS WHEEL-SPEED SENSOR INSPECTION»(ref-244482-S30621660082006092400000) .)
REAR ABS WHEEL-SPEED SENSOR INSPECTION
- Inspect the rear ABS wheel-speed sensor in the same order of vehicles with ABS. (See «REAR ABS WHEEL-SPEED SENSOR INSPECTION»(ref-244482-S15036431922006092400000) .)