Trouble Codes
To read trouble codes, observe oxygen sensor monitor light. This light has two duration periods of illumination, one period long (1.2 seconds) and one period short (.3 seconds). The long period signifies the tens digit in a numbered code. Short period signifies the ones digit. So for example: 3 long flashes and 5 short flashes, that would signify a code 35.
It is possible to have more than one code present. In this case, the lowest number trouble code should be diagnosed first, the next highest numbered code second and so on. Trouble codes will be repeated as long as the system is in that particular diagnostic mode.
NOTE:
When using diagnostic charts, check the connector while it is connected unless specified otherwise. Be sure to check again from the beginning in order to prevent secondary trouble caused by repair work. When checking with vacuum hose disconnected from vacuum switch at E/G on, be sure to plug hose.
CONTROL UNIT TERMINAL IDENTIFICATION
| Terminal | Wire Color | Description |
|---|---|---|
| 1 | LG | Kick-Down Control |
| 2 | RL | ECS Lamp |
| 3 | R | Test 4 |
| 4 | LR | EGR Solenoid (Control) |
| 5 | GL | Purge Control Solenoid |
| 6 | LY | Air Conditioner Signal |
| 7 | N/A | N/A |
| 8 | W | Air Flow Meter Signal |
| 9 | B | Air Flow Meter (Ground) |
| 10 | Y | Line End Cord Output |
| 11 | L | Line End Cord Output |
| 12 | RL | Line End Cord Output |
| 13 | N/A | N/A |
| 14 | YG | Neutral Switch |
| 15 | YL | Parking Switch (AT) |
| 16 | LgR | Kick-Down Monitor |
| 17 | R | Air Flow Meter Power (Output) |
| 18 | LgY | Starter Switch |
| 19 | GB | Crank Angle Sensor Power (Output) |
| 20 | GY | Crank Angle Sensor Signal (Position) |
| 21 | BW | Crank Angle Sensor Signal (Reference) |
| 22 | YG | Car-Speed Sensor |
| 23 | WB | Water Temperature Sensor |
| 24 | LG | Idle Switch |
| 25 | W | Throttle Sensor (Signal) |
| 26 | R | Throttle Sensor Power (Output) |
| 27 | BW | Power (Input) |
| 28 | GW | Self-Shutoff Signal |
| 29 | W | Power (Input) |
| 30 | BR | Ground |
| 31 | Br | Test Mode |
| 32 | RB | AT/MT Identification |
| 33 | Lg | 49 State/CA Identification |
| 34 | W | O2 Sensor |
| 35 | B | Ground |
| 36 | LW | EGR Monitor |
| 37 | N/A | N/A |
| 38 | RL | Ignition Switch |
| 39 | LgW | Read Memory |
| 40 | N/A | N/A |
| 41 | W | Power (Input) |
| 42 | BR | Ground |
| 43 | RW | Injector (+) |
| 44 | BR | Ground |
| 45 | GR | Air Control Valve |
| 46 | N/A | N/A |
| 47 | LB | Fuel Pump |
| 48 | RB | Injector (-) |
| 49 | RL | Power (Input) |
| 50 | N/A | N/A |
| 51 | B | Ground |
| 52 | WY | Ignition Control |