The On Board Diagnostic (OBD) program can be used to check whether individual parameters correspond to actual engine condition.
- Press button -1- to select mode 1, current data.
Display will appear as shown
Module 10* or 1A* will be displayed alternately when:
- Module 10 = Engine Control Module (ECM) -J220-, or
- Module 1A = Transmission Control Module (TCM) -J217- have the same parameter identifications (PID).
Example: Engine Coolant Temperature is measured at the ECM and ATF at the TCM.
The diagnostic data must be individually interrogated via the -> button. Press the Print button to obtain a printout.
The MIL is said to be switched ON when the engine is not idling, and only the ignition is switched ON.
Diagnostic Data:
Relevance of figures in 8 digit number block
Display will appear as shown
Relevance of figures in 8 digit number block
Display will appear as shown
Relevance of figures in 8 digit number block
Display will appear as shown
Display will appear as shown
If the specification is not obtained in display field 4 and a 1 is displayed, then the appropriate diagnostic sequence has not yet been performed. The readiness code must still be created. [1][2]Monitors, Trips, Drive Cycles and Readiness Codes
Relevance of figures in 8 digit number block
- Press -> button to display any additional diagnostic data.
PID3: Injection status
When the 4th position from the left is 1, the injection status is recognized as available.
- Press -> button.
PID4: Calculated load value %
Specification at idle approx.: 2%
- Press -> button.
PID5: Engine coolant temperature °C
Indicates the current engine coolant temperature.
Specification for engine at normal operating temperature: 80°C to 105°C (176° to 221°F).
- Press -> button.
PID5: Coolant temperature °C
Indicates the current ATF temperature.
When the ATF specification is above 140°C (284°F) with engine at normal operating temperature, 80° to 105°C (176° to 221°F) a DTC will be stored.
- Press -> button.
PID6: Short term fuel trim, Bank 1 %
The Oxygen sensor control integrator in % is displayed here.
- Press -> button.
PID7: Long term fuel trim, Bank 1 %
The adaptation increases the value in % depending upon altitude.
- Press -> button.
PID12: Engine speed (RPM)
The engine speed (RPM) is displayed here.
- Press -> button.
PID12: Engine speed (RPM)
The input speed (RPM) from transmission is displayed here.
- Press -> button.
PID13: Vehicle speed (mph)
Current vehicle speed display.
- Press -> button.
PID13: Vehicle speed (mph)
Current vehicle speed display.
- Press -> button.
PID14: Ignition timing advance °
Specification at idle: 12° fluctuating.
If the displayed ignition angle is constant, and later than 120 then the cause can be a faulty knock sensor.
- Press -> button.
PID15: Intake air temperature °C
Measured at idle, slightly above ambient temperature.
- Press -> button.
PID16: Mass air flow g/sec
Measured at idle approx.: 4.3 g/sec.
If the value is below 2.5 g/sec. unmetered air can be the cause.
- Press -> button.
PID17: Throttle position %
Specification at idle: 2-4%.
A too large or small a value leads to DTC:P1582.
- Press -> button.
PID18: Secondary air injection status
When the 3rd position from right is 1,the secondary air injection system is recognized as available.
- Press -> button.
PID19: Location / Heated oxygen sensor
When the 1st and the 2nd position from right is 1, the heated oxygen sensors are recognized as available.
- Press -> button.
PID20: Heated oxygen sensor 1: 0.445 V x%
- The displayed value in volts must fluctuate between 0 and 1.0 volts.
- Press -> button.
PID21: Heated oxygen sensor 2: 0.445 V x%
- The displayed value in volts must fluctuate between 0 and 1.0 volt, however it must be at a slower rate than the HO2S before three way catalytic converter.
- Press -C- button to exit mode 1.