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Home >> GMC >> 1997 >> Forward Control 6.5 F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 6.5L Diesel (P Series) >> Self-Diagnostic System >> Typical Tech 1 Or 2 Data Values
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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.
TYPICAL TECH 1 OR 2 DATA VALUES

Tool Position Units Measured Nominal Data Value
Act. Inj. Timing Degrees 3.5-6.0
APP Angle % 0
APP 1 Volts .45-.95
APP 2 Volts 4.0-4.5
APP 3 Volts 3.6-4.0
BARO kPa/Volt 3-5 Volts (Varies With Altitude & BARO Pressure)
Boost Pressure kPa 60-103 (Varies With Altitude)
Boost Solenoid % 60-70
Brake Switch On/Off Off
Crank Ref Missed # 0 (Missed)
Desired Idle RPM PCM Commanded
Des. Inj. Timing Degrees 3.5-6.0
Device Control Yes/No No
DTC Set This Ign. Yes/No No
ECT F/C 185-221 (85-105) (Varies With Temp)
ECT Sensor Volts 1.7-2.2 (Varies With Temp.)
Engine Load % 4-6
Engine Run Time Hr/Min /Sec Varies
Engine Speed RPM +/-100 From Desired
ESO Solenoid On/Off On
Fuel Rate Mm Cubed 7-12
Fuel Temperature F/C 140-176 (60-80) (Varies With Temp.)
Glow Plug Volts 0
Glow Plug System Disabled /Enabled Disabled
IAT F/C 140-176 (60-80) (Varies With Temp.)
Ignition Volts Volts 12-14
Inj. Pump Cam Ref. Missed Counts 0
Inj. Pump Sol. Closure Time Milsec 1.70-1.90
Lift Pump Relay Disabled /Enabled Enabled
Lift Pump Volts 12-15
MIL Light On/Off Off
MPH/KPH MPH/KPH 0-0
Start-Up ECT F/C Varies (Depends On Start-Up ECT)
STS Light On/Off Off
TDC Offset Degrees +.75 To -1.95
# Of Curr DTCs Counts 0