VTM-4 Control Unit Inputs and Outputs
The VTM-4 control unit terminal voltage and measuring conditions for the VTM-4 inputs and outputs test are done with the VTM-4 connectors connected.
TERMINAL DESCRIPTION
| Terminal number | Wire color | Terminal sign (Terminal name) | Description | Measurement | |
|---|---|---|---|---|---|
| Conditions | Voltage | ||||
| A1 | YEL | IG1 (IGNITION SIGNAL) | Power supply for activating the system | Ignition switch to ON (II) | Battery voltage |
| A3 | GRY/RED | RRP (Rear right pulse) | Detect right-rear wheel speed sensor signal | Turn wheel at 1 rotation/second | There should be 0 to about 5.0 V repeatedly. (A digital voltmeter reads about 2.5 V when the wheel is turning faster.) |
| A4 | ORN/GRN | FSR (Fail-safe relay) | Drives VTM-4 relay | Ignition switch to ON (II) | Battery voltage |
| Engine running | Less than 1.0 V | ||||
| A5 | GRY/YEL | RLP (Rear left pulse) | Detects left-rear wheel speed sensor signal | Turn wheel at 1 rotation/second | There should be 0 to about 5.0 V repeatedly. (A digital voltmeter reads about 2.5 V when the wheel is turning faster.) |
| A6 | GRN/ORN | PARBRK (Parking brake) | Detects parking brake signal | Parking brake on | Less than 2.0 V |
| Parking brake off | Battery voltage | ||||
| A7 | LT GRN | FRP (Front right pulse) | Detects right-front wheel speed sensor signal | Turn wheel at 1 rotation/second | There should be 0 to about 5.0 V repeatedly. (A digital voltmeter reads about 2.5 V when the wheel is turning faster.) |
| A8 | BRN/WHT | LOCKSW (LOCK switch) | Detects VTM-4 LOCK switch signal | Ignition switch to ON (II) | Less than 1.0 V |
| VTM-4 LOCK mode | Battery voltage | ||||
| A9 | WHT/RED | FLP (Front left pulse) | Detects left-front wheel speed sensor signal | Turn wheel at 1 rotation/second | There should be 0 to about 5.0 V repeatedly. (A digital voltmeter reads about 2.5 V when the wheel is turning faster.) |
| A10 | BLK | LG1 (Logic ground) | Ground | Less than 0.5 V | |
| A11 | WHT | CANH (CAN communication signal high) | CAN communication signal | Ignition switch to ON (II) | About 2.5 V (pulses) |
| A12 | BLU | NEP (Engine revolution) | Detects engine revolution signal | Ignition switch to ON (II) | Above 8.0 V |
| Engine running at 1, 000 rpm | 5.0 to 8.0 V | ||||
| A13 | BLK | TOL (Temperature oil low) | Detects differential fluid temperature sensor signal | Check at normal temperature with the ignition switch to ON (II) | 1.0 to 3.6 V |
| A14 | RED/WHT | WARN1 (Warning 1) | Drives VTM-4 indicator | VTM-4 indicator on | Less than 4.0 V |
| VTM-4 indicator off | Battery voltage | ||||
| A15 | WHT | TOH (Temperature oil high) | Power supply for differential fluid temperature sensor | Check at normal temperature with the ignition switch ON (II) | 4.0 to 5.0 V |
| A16 | YEL/BLK | LOCKL (Lock lamp) | Drives VTM-4 LOCK indicator | VTM-4 LOCK indicator on | Less than 4.0 V |
| VTM-4 LOCK indicator off | Battery voltage | ||||
| A18 | LT BLU | K-LINE | Communication signal to HDS | Ignition switch to ON (II) (Not connected to HDS) | About 9.0 V |
| A20 | BRN | SCS (Service check signal) | Detects service check connector signal | SCS circuit shorted | Less than 2.0 V |
| SCS circuit opened | About 5.0 V | ||||
| A22 | RED | F-CANL (F-CAN communication signal low) | CAN communication signal | Ignition switch to ON (II) | About 2.5 V (pulses) |
TERMINAL DESCRIPTION
| Terminal number | Wire color | Terminal sign (Terminal name) | Description | Measurement | |
|---|---|---|---|---|---|
| Conditions | Voltage | ||||
| B1 | BLK/RED | LCOH (Left coil high) | Drives left clutch electromagnetic coil (positive) | Ignition switch to ON (II) | Less than 1.0 V |
| Engine running | Less than 1.0V | ||||
| VTM-4 LOCK mode | Above 3.0 V | ||||
| B2 | BLK/WHT | LCOL (Left coil low) | Drives left clutch electromagnetic coil (negative) | Ignition switch to ON (II) | Less than 1.0 V |
| Engine running | Less than 1.0 V | ||||
| VTM-4 LOCK mode | Less than 1.0 V | ||||
| B3 | BRN | RCOH (Right coil high) | Drives right clutch electromagnetic coil (positive) | Ignition switch to ON (II) | Less than 1.0 V |
| Engine running | Less than 1.0 V | ||||
| VTM-4 LOCK mode | Above 3.0 V | ||||
| B4 | GRN | RCOL (Right coil low) | Drives right clutch electromagnetic coil (negative) | Ignition switch to ON (II) | Less than 1.0 V |
| Engine running | Less than 1.0 V | ||||
| VTM-4 LOCK mode | Less than 1.0 V | ||||
| B5 | BLK | PG (Power ground) | Ground | Less than 0.5 V | |
| B7 | RED/BLU | PWR (Power) | Power supply for VTM-4 control unit | 10 seconds after ignition switch to ON (II) | Less than 3.0 V |
| Engine running | Battery voltage | ||||
| VTM-4 LOCK mode | Battery voltage | ||||
| B11 | RED/WHT | WARN2 (Warning 2) | Drives VTM-4 indicator | VTM-4 indicator on | Less than 4.0 V |
| VTM-4 indicator off | Battery voltage | ||||
| B12 | BLK | LG2 (Logic ground) | Ground | Less than 0.5 V | |