DSC Control Inspection
- Perform " «PREPARATION»(ref-345278-S18010997922009102000000) ".
- Connect the M-MDS to the DLC-2.
- Set up an active command mode inspection according to the combination of commands below. (See «ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)]»(ref-345277-S06207214382009102000000) .) CAUTION: When operating the solenoid valve and pump motor using the active command mode, make sure to keep the operation time within 2 s to prevent damaging the DSC HU/CM. REFERENCE CHART Command name Inspected wheels Understeer control disabled Oversteer control disabled LF RF LR RR LF_TC_PRV ON OFF ON RF_TC_PRV OFF ON OFF LF_TC_SWV OFF RF_TC_SWV LF_INLET OFF OFF OFF ON LF_OUTLET OFF LR_INLET ON LR_OUTLET OFF RF_INLET ON RF_OUTLET OFF RR_NLET 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 has no significant malfunction (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. Intermittent malfunction of the above items Malfunction of DSC HU/CM input system wiring harnesses and parts Extremely small leakage in the DSC HU/CM internal hydraulic system
DSC HU/CM INSPECTION
- Disconnect the DSC HU/CM connector.
- Connect the negative battery cable.
- Attach the tester lead to the DSC HU/CM wiring harness-side connector and inspect voltage, continuity, or resistance according to the standard (reference) on the table.
Scheme 15
| Terminal | Signal name | Connected to | Measured item | Measured terminal (measurement condition) | Standard | Inspection item(s) |
|---|---|---|---|---|---|---|
| A | Ground (system) | Ground point | Continuity | A-ground point | Continuity detected | Wiring harness (A-ground point) |
| B | Ground (ABS motor) | Ground point | Continuity | B-ground point | Continuity detected | Wiring harness (B-ground point) |
| C | ||||||
| D | CAN_L | DLC-2 (CAN_L) | Continuity | D-DLC-2 terminal CAN_L | Continuity detected | D-DLC-2 terminal CAN_L |
| E | ||||||
| F | LF wheel-speed sensor (ground) | LF wheel-speed sensor | Continuity | F-LF ABS wheel-speed sensor terminal A | Continuity detected | Wiring harness (F-LF ABS wheel-speed sensor terminal A) |
| G | ||||||
| H | CAN2_H | Combined sensor | Continuity | H-combined sensor terminal B | Continuity detected | Wiring harness (H-combined sensor terminal B) |
| I | LF wheel-speed sensor (single) | LF ABS wheel-speed sensor | Continuity | I-LF ABS wheel-speed sensor terminal A | Continuity detected | Wiring harness (I-LF ABS wheel-speed sensor terminal A) |
| J | ||||||
| K | ||||||
| L | ||||||
| M | ||||||
| N | ||||||
| O | RR wheel-speed (signal) | RR ABS wheel-speed sensor | Continuity | O-RR ABS wheel-speed sensor terminal A | Continuity detected | Wiring harness (O-RR ABS wheel-speed sensor terminal A) |
| P | CAN_H | DLC-2 (CAN_H) | Continuity | P-DLC-2 terminal CAN_H | Continuity detected | Wiring harness (P-DLC-2 terminal CAN_H) |
| Q | ||||||
| R | RR wheel-speed (ground) | RR ABS wheel-speed sensor | Continuity | R-RR ABS wheel-speed sensor terminal B | Continuity detected | Wiring harness (R-RR ABS wheel-speed sensor terminal B) |
| S | ||||||
| T | CAN2_L | Combined sensor | Continuity | T-combined sensor terminal A | Continuity detected | Wiring harness (T-combined sensor terminal A) |
| U | ||||||
| V | ||||||
| W | ||||||
| X | ||||||
| Y | ||||||
| Z | ||||||
| AA | ||||||
| AB | Sensor power supply | Combined sensor, steering angle sensor | Continuity | AB-combined sensor terminal D AB-steering angle sensor terminal A | Continuity detected | Wiring harness (AB-combined sensor terminal D) Wiring harness (AB-steering angle sensor terminal A) |
| AC | ||||||
| AD | DSC OFF switch | DSC OFF switch | Continuity | AD-DSC OFF switch | Continuity detected | Wiring harness (AD-DSC OFF switch) |
| AE | Steering angle sensor (signal B) | Steering angle sensor | Continuity | AE-steering angle sensor terminal C | Continuity detected | Wiring harness (AE-steering angle sensor terminal C) |
| AF | ||||||
| AG | LR wheel-speed (ground) | LR wheel-speed sensor | Continuity | AG-LR ABS wheel-speed sensor terminal B | Continuity detected | Wiring harness (AG-LR ABS wheel-speed sensor terminal B) |
| AH | Sensor ground | Combined sensor, steering angle sensor | Continuity | AH-combined sensor terminal E AH-steering angle sensor terminal D | Continuity detected | Wiring harness (AH-combined sensor terminal E) Wiring harness (AH-steering angle sensor terminal D) |
| Al | ||||||
| AJ | LR wheel-speed (signal) | LR ABS wheel-speed sensor | Continuity | AJ-LR ABS wheel-speed sensor terminal A | Continuity detected | Wiring harness (AJ-LR ABS wheel-speed sensor terminal A) |
| AK | Power supply (system) | Ignition switch | Voltage | The ignition switch is at the ON position. | B+ | Wiring harness (AK-ignition switch) |
| The ignition switch is off. | 1 V or less | |||||
| AL | ||||||
| AM | ||||||
| AN | Steering angle sensor (signal A) | Steering angle sensor | Continuity | AN-steering angle sensor terminal B | Continuity detected | Wiring harness (AN-steering angle sensor terminal B) |
| AO | ||||||
| AP | RF wheel-speed (signal) | RF ABS wheel-speed sensor | Continuity | AP-RF ABS wheel-speed sensor terminal A | Continuity detected | Wiring harness (AP-RF ABS wheel-speed sensor terminal A) |
| AQ | ||||||
| AR | ||||||
| AS | RF wheel-speed (ground) | RF ABS wheel-speed sensor | Continuity | AS-RF ABS wheel-speed sensor terminal B | Continuity detected | Wiring harness (AS-RF ABS wheel-speed sensor terminal B) |
| AT | Power supply (ABS motor operation) | Battery | Voltage | Under any condition | B+ | Wiring harness (AT-battery) |
| AU | Power supply (solenoid operation) | Battery | Voltage | Under any condition | B+ | Wiring harness (AU-battery) |
TERMINALS REFERENCE
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-345279-S15315535032009102000000) .)
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-345279-S33919940342009102000000) .)
Scheme 16
- Turn the ignition switch off.
- Install the SSTs to the master cylinder as shown in the figure. NOTE: When installing the SST (49 D043 0A0) to the master cylinder, use a commercially available flare nut wrench (flare nut across flat 12 mm {0.47 in}).
- Bleed the brake line and the SSTs of air. (Bleed the SSTs of air using air bleed valve A.)
- Connect the M-MDS to the DLC-2.
- Select the "MPRETDR" PID. (See «ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)]»(ref-345277-S06207214382009102000000) .)
- Start the engine.
- Depress the brake pedal, and verify that the fluid pressure value of the SST (gauge) and the value shown on the M-MDS are equal. If the fluid pressure values are different, replace the DSC HU/CM. (See «DSC HU/CM REMOVAL/INSTALLATION»(ref-345278-S13531904842009102000000) ).