Contents Wiring diagrams Section: Testing & Diagnostics All sections

Engine Controls - Tests W/codes - 6.5L: Other Chevrolet Tahoe I

TYPICAL TECH 1 OR 2 DATA VALUES

Note. Information contained in the following table is typical of readings taken on vehicle with engine idling, upper radiator hose hot, throttle closed, transmission in Park or Neutral, closed loop status achieved and all accessories off (except as noted in tables). Not all devices and systems are used on all models. Refer to scan tool manufacturer's instructions.

Tool PositionUnits MeasuredNominal Data Value
A/B/C Range SwOn/OffOff
A/C CompressorEngage/ DisengageDisengage
A/C RelayYes/NoNo
A/C RequestOn/OffOff
Actual EGRKPa75-85
Act. Inj. TimingDegrees4-7
APP Angle%0
APP 1Volts.45-.95
APP 2Volts4.0-4.5
APP 3Volts3.6-4.0
BAROKPa/Volt3-5 Volts (Varies With Altitude & BARO Pressure)
Boost PressureKPa60-103 (Varies With Altitude)
Boost Solenoid%60-70
Brake SwitchOpn/ClsdOpen
Calc A/C LoadFt Lbs0
Crank Ref Missed#0 (Missed)
Cruise ActiveOn/OffOff
Cruise Brake Sw.Opn/ClsdClsd
Cruise SwitchOn/OffOff
Desired EGRKPa75-85
Desired IdleRPMPCM Commanded
Desired SpeedRPM652
Des. Inj. TimingDegrees4-7
Device ControlYes/NoNo
DTC Set This Ign.Yes/NoNo
DTC Set This Ign.Counts0
ECTF/C185-221 (85-105) (Varies With Temp)
ECTF/C200 (93)
ECT SensorVolts1.7-2.2 (Varies With Temp.)
ECT SensorVolts2.0
EGR Solenoid%35-45
EGR Vent SolOn/OffOn
Engine Load%4-6
Engine Run TimeSeconds0
Engine Run TimeHr/Min /SecVaries
Engine SpeedRPM+/-100 From Desired
Engine SpeedRPM650
Engine TorqueFt Lbs7-10
ESO SolenoidOn/OffOn
Front Axle Sw.Unlocked /LockedUnlocked
Fuel RateMm Cubed7-12
Fuel TemperatureF/C159 (70)
Glow PlugVolts0
Glow Plug SystemDisabled /EnabledDisabled
IATF/C140-176 (60-80) (Varies With Temp.)
IAT SensorVolts1.46
IAT SensorF/C109 (43)
Ignition VoltsVolts12-14
Inj. Pump Cam Ref. MissedCounts0
Inj. Pump Sol. Closure TimeMilsec1.70-1.90
Lift PumpVolts12-15
Lift Pump RelayDisabled /EnabledEnabled
Lift PumpVolts12-15
Lift Pump SystemDisabled /EnabledEnabled
MIL LightOn/OffOff
MPH/KPHMPH/KPH0-0
PC SolenoidOn/OffOff
Resume SwitchOn/OffOff
Set SwitchOn/OffOff
Start-Up ECTF/CVaries (Depends On Start-Up ECT)
Start-Up ECTF/CVaries
STS LightOn/OffOff
TCC EnabledOn/OffOff
TDC OffsetDegrees+.75 To -1.95
TFTF/C158 (70)
TFT SensorVolts2.5-3.5
TR SwitchPark/Neut, Rev, D1, D2, D3Park
1-2 Sol/2-3 SolOn/OffOn/Off
4WDL ModeEnabled/ DisabledDisabled
# Of Curr DTCsCounts0

TYPICAL TECH 1 OR 2 DATA VALUES