Scan Tool Data: Notes
As the data values are standard values estimated on the basis of values obtained from the normally operating vehicles by using a scan tool, use them as reference values. Even when the vehicle is in good condition, there may be cases where the checked value does not fall within each specified data range. Therefore, judgment as abnormal should not be made by checking with these data alone.
Also, conditions that can be checked by the scan tool are those detected by ECM and output from ECM as commands and there may be cases where the engine or actuator is not operating (in the condition) as indicated by the scan tool. Be sure to use the timing light to check the ignition timing.
NOTE:
- With the OBD-II generic scan tool, only star (*) marked data in the following table can be read.
- When checking the data with the engine running at idle or racing, be sure to shift M/T gear to the neutral gear position and A/T gear to the "Park" position and pull the parking brake fully. Also, if nothing or "no load" is indicated, turn OFF A/C, all electric loads, P/S and all the other necessary switches.
SCAN TOOL DATA CHART
| Scan tool data | Vehicle condition | Normal condition / reference values | |
|---|---|---|---|
| ENGINE SPEED | At idling with no load after warming up | Desired idle speed +/- 50 r/min | |
| DESIRED IDLE (DESIRED IDLE SPEED) | At idling with no load after warming up, M/T at neutral, A/T at "P" range | 750 r/min | |
| IAC FLOW DUTY (IDLE AIR CONTROL FLOW DUTY) | At idling with no load after warming up | 5 - 15% | |
| COOLANT TEMP (ENGINE COOLANT TEMP.) | At specified idle speed after warming up | 80 - 100°C, 176 - 212°F | |
| INTAKE AIR TEMP | At specified idle speed after warming up | -5°C (9°F) + Environmental temp. to 20°C (36°F) + Environmental temp. | |
| MAF (MASS AIR FLOW RATE) | At specified idle speed with no load after warming up | 1.5 - 4.0 g/s 0.20 - 0.53 lb/min |
|
| At 2500 r/min with no load after warming up | 5.0 - 12.0 g/s 0.66 - 1.58 lb/min |
||
| CALC LOAD (CALCULATED LOAD VALUE) | At specified idle speed with no load after warming up | 1.5 - 3.5% | |
| At 2500 r/min with no load after warming up | 5 - 11% | ||
| THROTTLE POSITION (ABSOLUTE THROTTLE POSITION) | Ignition switch ON / warm engine stopped | Accelerator pedal released | 0% |
| Accelerator pedal depressed fully | 80 - 100% | ||
| TP SENSOR VOLT (THROTTLE POSITION SENSOR OUTPUT VOLTAGE) | Ignition switch ON / warm engine stopped | Accelerator pedal released | 0.5 - 0.9 V |
| Accelerator pedal depressed fully | 3.5 - 4.5 V | ||
| MAP (INTAKE MANIFOLD ABSOLUTE PRESSURE) | At specified idle speed after warming up | 25 - 35 kPa 187 - 262 mm Hg | |
| BAROMETRIC PRES | - | Display barometric pressure | |
| FUEL SYSTEM B1 (FUEL SYSTEM STATUS) | At specified idle speed after warming up | CLOSED (closed loop) | |
| INJ PULSE WIDTH (FUEL INJECTION PULSE WIDTH) | At specified idle speed with no load after warming up | 1.8 - 3.0 msec. | |
| At 2500 r/min with no load after warming up | 1.8 - 3.0 msec. | ||
| O2S B1 S1 (HEATED OXYGEN SENSOR-1) | At specified idle speed after warming up | 0.05 - 0.95 V | |
| O2S B1 S2 (HEATED OXYGEN SENSOR-2) | When engine is running at 2000 r/min. for 3 min or longer after warming up. | 0.05 - 0.9 V | |
| SHORT FT B1 (SHORT TERM FUEL TRIM) | At specified idle speed after warming up | -20 -+20% | |
| LONG FT B1 (LONG TERM FUEL TRIM) | At specified idle speed after warming up | -14.8 -+14.8% | |
| TOTAL FUEL TRIM B1 | At specified idle speed after warming up | -35 -+35% | |
| FUEL CUT | When engine is at fuel cut condition | ON | |
| Other than fuel cut condition | OFF | ||
| CANIST PRG DUTY (EVAP CANISTER PURGE FLOW DUTY) | At specified idle speed after warming up | 0% | |
| EVAP VENT VALVE (EVAP CANISTER VENT VALVE) | Other than EVAP system monitoring condition | OFF | |
| LEAK CHECK PUMP (EVAP LEAK DETECTION PUMP) (VEHICLE WITH ORVR) | Other than EVAP system monitoring condition | OFF | |
| FUEL TANK PRESS (EVAP LEAK CHECK PRESSURE) (VEHICLE WITH ORVR) | Ignition switch ON | Same as barometric pressure | |
| FUEL TANK LEVEL | - | 0 - 100% | |
| IGNITION ADVANCE (IGNITION TIMING ADVANCE FOR No. 1 CYLINDER) | At specified idle speed with no load after warming up | 6 - 10° BTDC | |
| STEP EGR FLOW DUTY | At specified idle speed after warming up | 0% | |
| BATTERY VOLTAGE | Ignition switch ON / engine stop | 10 - 14 V | |
| FUEL PUMP | Within 3 seconds after ignition switch ON or engine running | ON | |
| Engine stop at ignition switch ON | OFF | ||
| PNP SIGNAL (PARK/NEUTRAL POSITION SIGNAL) A/T only | Ignition switch ON | Selector lever in "P" or "N" position | P/N RNG |
| Selector lever in "R", "D", "2" or "L" position | D RNG | ||
| A/C SWITCH | Engine running after warming up, A/C not operating | OFF | |
| Engine running after warming up, A/C operating | ON | ||
| BLOWER FAN | Ignition switch ON, blower fan switch ON | ON | |
| Ignition switch ON, blower fan switch OFF | OFF | ||
| A/C COND FAN | Ignition switch ON, A/C not operating | OFF | |
| Ignition switch ON, A/C operating | ON | ||
| PSP SWITCH (POWER STEERING PRESSURE SWITCH) | Engine running at idle speed and steering wheel at straight-ahead position | OFF | |
| Engine running at idle speed and steering wheel turned to the right or left as far as it stops | ON | ||
| CLOSED THROT POS (CLOSED THROTTLE POSITION) | Throttle valve at idle position | ON | |
| Throttle valve opens larger than idle position | OFF | ||
| VEHICLE SPEED | At stop | 0 km/h, 0 MPH | |