1994 PCED OBDI-A
SECTION 18A: Diesel Diagnosis — 7.3L DI Engine

Diagnostic Trouble Code Description
 
3 DigitDescriptionPinpoint Test Step Go to Direction
KOEOKOERContinuous
111System PassPassPassPass
116EOT Out of KOER Self-Test LimitsY1
117EOT Circuit Low InputY7Y10
118EOT Circuit High InputY5Y10
122Accelerator Pedal Position Circuit Low InputE4E4
123Accelerator Pedal Position Circuit High InputE1E1
124Idle Validation Switch FaultAA1
125AP/IVS DisagreeAA1
126MAP Sensor Frequency Out of RangeD1
127MAP Signal InactiveD3D3
128MAP Sensor Frequency In-Range FailureD5
145Exhaust Back Pressure Circuit Low InputH2H2
146Exhaust Back Pressure Circuit High LowH5H5
147Excessive Exhaust Back PressureH1
151IAT Circuit Low InputC3C5
152IAT Circuit High InputC1C5
153ICP Circuit Low InputZ1Z1
154ICP Circuit High InputZ4Z4
155Excessive ICPX5
511PCM ROM FailureAG1
512KAM Test FailureAH1
514EBP Control Solenoid Circuit FailureM1
515Glow Plug Relay Output Circuit FailureS1
516Glow Plug Lamp Output Circuit FailureR1
517B+ High VoltageA1
518B+ Low VoltageA1
523PCM Inactive Background FaultAJ
528Clutch Pedal Position Switch FailureN1N1
536Brake Switch Input Malfunction (BOO)K1K1
546IPR Output Circuit CheckX1
547OCC Signal HighAE1
548OCC Signal LowAD1
549IDM Relay Coil Circuit OpenW1
816CMP Counter ErrorG1
817CMP Signal NoiseG1
818Inactive CMPG1
819ICP Higher/Lower Than ExpectedZ6
827BARO Circuit Low InputAC1AC1
No CodeNo Codes RetrievedAF1
828BARO Circuit High InputAC4AC4
831Speed Control ON Not Pressed — KOERF1
832Speed Control OFF Not Pressed — KOERF1
833Speed Control RESUME Not Pressed — KOERF1
834Speed Control SET Not Pressed — KOERF1
835Speed Control COAST Not Pressed — KOERF1
841ICP Not Controllable — KOERX6X6
842Exhaust Back Pressure Not Controllable — KOERM5
843Vehicle Moved During KOER Self-TestRepeat Test
844Invalid Cylinder Test Due To Pedal MovementRepeat Test
845IVPWR Too Low For Cylinder Contribution TestA1
846Invalid KOER/CCT — ICP Fault ExistsPerform KOEO Test
863Parking Brake Switch Circuit FailureQ1
864Brake Pressure Applied Circuit FailureP1
911IDM — Injector System PassPassPassPass
915Cylinder Identification HighV1V1
916Cylinder Identification LowV1V1
921Low Side Short To Ground — Cylinder 1 (A)AB1AB1
922Low Side Short To Ground — Cylinder 2 (B)AB1AB1
923Low Side Short To Ground — Cylinder 3 (D)AB1AB1
924Low Side Short To Ground — Cylinder 4 (E)AB1AB1
925Low Side Short To Ground — Cylinder 5 (F)AB1AB1
926Low Side Short To Ground — Cylinder 6 (G)AB1AB1
927Low Side Short To Ground — Cylinder 7 (C)AB1AB1
928Low Side Short To Ground — Cylinder 8 (H)AB1AB1
931Low Side Short To B+ — Cylinder 1 (A)AB5AB5
932Low Side Short To B+ — Cylinder 2 (B)AB5AB5
933Low Side Short To B+ — Cylinder 3 (D)AB5AB5
934Low Side Short To B+ — Cylinder 4 (E)AB5AB5
935Low Side Short To B+ — Cylinder 5 (F)AB5AB5
936Low Side Short To B+ — Cylinder 6 (G)AB5AB5
937Low Side Short To B+ — Cylinder 7 (C)AB5AB5
938Low Side Short To B+ — Cylinder 8 (H)AB5AB5
941Cylinder 1 Non-ContributingAB7
942Cylinder 2 Non-ContributingAB7
943Cylinder 3 Non-ContributingAB7
944Cylinder 4 Non-ContributingAB7
945Cylinder 5 Non-ContributingAB7
946Cylinder 6 Non-ContributingAB7
947Cylinder 7 Non-ContributingAB7
948Cylinder 8 Non-ContributingAB7
955CID Output Circuit FailureU1
956FDCS Output Circuit Check FaultT1
961High To Low Side Short — Cylinder 1 (A)AB9AB9
962High To Low Side Short — Cylinder 2 (B)AB9AB9
963High To Low Side Short — Cylinder 3 (D)AB9AB9
964High To Low Side Short — Cylinder 4 (E)AB9AB9
965High To Low Side Short — Cylinder 5 (F)AB9AB9
966High To Low Side Short — Cylinder 6 (G)AB9AB9
967High To Low Side Short — Cylinder 7 (C)AB9AB9
968High To Low Side Short — Cylinder 8 (H)AB9AB9
971High To Low Side Open — Cylinder 1 (A)AB13AB13
972High To Low Side Open — Cylinder 2 (B)AB13AB13
973High To Low Side Open — Cylinder 3 (D)AB13AB13
974High To Low Side Open — Cylinder 4 (E)AB13AB13
975High To Low Side Open — Cylinder 5 (F)AB13AB13
976High To Low Side Open — Cylinder 6 (G)AB13AB13
977High To Low Side Open — Cylinder 7 (C)AB13AB13
978High To Low Side Open — Cylinder 8 (H)AB13AB13
983PCM — IDM Diagnostic Communications ErrorU1
988IDM FailureU1, W1U1, W1
991High Side Short To GND Or B+ Right BankAB17AB17
992High Side Short To GND Or B+ Left BankAB17AB17
993High Side Open Right BankAB21AB21
994High Side Open Left BankAB21AB21
995Multiple Faults, Right Bank With Low Side ShortedAB25AB25
996Multiple Faults, Left Bank With Low Side ShortedAB25AB25
997High Side Switches Shorted TogetherAB26AB26

Note: Speed Control (DTCs) will be set if the vehicle is not equipped with speed control. This is a normal condition. On these vehicles ignore the following DTCs 831-832-834-835.