Retrieving Codes
- Turn the ignition switch ON. Using SST (part number 09843-18020), connect terminals Tc and E1 of TDCL or check connector. See Fig 1 and Fig 2 .
- Read the diagnostic code from the TRAC indicator light on the combination meter. Light will flash in sequence to indicate code digits. For example if only Code 21 is present, after a four second delay, the light will flash twice for a half second, go out for 1.5 seconds and flash four times for a half second each. If additional codes are present, they will flash after a 2.5 second pause. If codes are not present, the light will flash on and off in quarter second intervals.NOTE: If no code appears and trouble is suspected, inspect the diagnostic circuit. See TRAC INDICATOR LIGHT CIRCUIT under TROUBLE SHOOTING .
- Codes are explained in the DIAGNOSTIC CODE . After completing the check, disconnect terminals Tc and E1, and turn off the display. If two or more malfunctions are indicated at the same time, the lowest numbered diagnostic code will be displayed first.
DIAGNOSTIC CODE
| Code | Diagnosis |
|---|---|
| 11 | Open in TRAC brake main relay circuit |
| 12 | Short in TRAC brake main relay circuit |
| 13 | Open in TRAC throttle relay circuit |
| 14 | Short in TRAC throttle relay circuit |
| 15 | Electric supply to TRAC motor for a long time (Fluid leakage) |
| 16 | Open circuit in pressure switch circuit |
| 17 | Pressure switch remains OFF |
| 19 | TRAC motor ON and OFF operation is higher than a predetermined number of times (Accumulator pressure leakage) |
| 21 | Open or short in master cylinder cut solenoid valve circuit |
| 22 | Open or short in accumulator cut solenoid valve circuit |
| 23 | Open or short in reservoir cut solenoid valve circuit |
| 24 | Open or short in sub-throttle actuator circuit |
| 25 | Step motor does not move to a position decided by ECU |
| 26 | Sub-throttle valve does not move even when the sub-throttle valve is controlled to fully open position by ECU |
| 27 | When power supply to step motor is stopped, sub-throttle valve does not reach its fully-open position |
| 44 | During TRAC control, NE signals are not input to the ECU |
| 45 | When idle switch is ON, main throttle position sensor signal is 1.5V or higher |
| 46 | Main throttle position sensor signal is 4.3V or higher, or main throttle position sensor signal is 0.2V or lower when idle switch is OFF |
| 47 | When idle switch is ON, sub-throttle position sensor signal is 1.45V or higher |
| 48 | Sub-throttle position sensor signal is 4.3V or higher, or sub-throttle position sensor signal is 0.2V or lower when idle switch is OFF |
| 49 | Open or short in engine communication circuit |
| 51 | Problem in engine control system |
| 52 | Brake fluid level warning switch ON |
| 54 | Open in TRAC motor relay circuit |
| 55 | Short in TRAC motor relay circuit |
| 56 | TRAC pump motor locked |
| Always ON | Malfunction in ECU |
If a malfunction code is displayed during the diagnostic code check, check the circuit listed for that code.
AFFECTED CIRCUIT CODE
| Code No. | Circuit/Parts |
|---|---|
| 11, 12 | TRAC Brake Main Relay Circuit |
| 13, 14 | TRAC Throttle Relay Circuit |
| 15 | Fluid Leakage in Actuators or Tubing Pressure Switch Circuit |
| 16, 17 | Pressure Switch Circuit |
| 19 | Fluid Leakage in Actuators or Tubing Pressure Leakage of Accumulator |
| 21, 22, 23 | TRAC Actuator Solenoid Circuit |
| 24 | TRAC Sub-Throttle Actuator Circuit |
| 25, 26, 27 | TRAC Sub-Throttle Valve |
| 44 | NE Signal Circuit |
| 45, 46 | Main Throttle Position Sensor Circuit |
| 47, 48 | Sub-Throttle Position Sensor Circuit |
| 49 | Engine Communication Circuit |
| 51 | Engine Malfunction Detection Circuit |
| 52 | Brake Fluid Level Warning Switch Circuit |
| 54, 55 | TRAC Pump Motor Relay Circuit |
| 56 | TRAC Pump Motor Lock Sensor Circuit |