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Engine Controls - Tests W/codes - 2.5L: Overview Jeep Cherokee II

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

Fault CodeFault Condition
1000Ignition circuit low.
1001Ignition circuit high.
1004ECU battery feed and power grounds.
1005System ground circuit.
1006EGR solenoid circuit low.
1007EGR solenoid circuit high.
1008Power steering circuit low.
1009Power steering circuit high.
1012Fuel injector circuits.
1013Ignition module (MPA) circuit high.
1014Fuel pump circuit low.
1015Fuel pump circuit high.
1016Manifold Air Temperature (MAT) circuit low.
1017Manifold Air Temperature (MAT) circuit high.
1018Serial data circuit (A/T or M/T).
1019Power latch not set.
1021Engine failed to start.
1022Starter relay circuit low.
1024ECU start circuit low.
1025Wide Open Throttle (WOT) circuit low.
1027Throttle Position Sensor (TPS) circuit high.
1028Checking TPS calibration.
1029Idle Speed Actuator (ISA) closed throttle circuit low.
1030Idle Speed Actuator (ISA) closed throttle circuit high.
1031ECU closed throttle circuit low.
1032ECU closed throttle circuit high.
1033-36Idle Speed Actuator (ISA) circuits.
1037Throttle Position Sensor (TPS) circuit low.
1038Serial data enable circuit high.
1039Serial data enable circuit low.
1040Power latch relay circuit low.
1041Power latch relay circuit high.
1042Charging and ECU circuits.
1043Shift light circuit low.
1044D2-1 circuit low (A/T).
1044Upshift light circuit (M/T).
1048Checking manual transmission vehicle for correct ECU.
1049Checking A/T vehicle configuration.
1050Idle RPM low.
1051Idle RPM high.
1052Manifold Absolute Pressure (MAP) sensor circuits.
1053Manifold Absolute Pressure (MAP) sensor ground circuit.
1054Coolant sensor and 5-volt supply to TPS/MAP circuit low.
1055Coolant sensor circuit high.
1056Inactive coolant temperature sensor.
1059A/C request circuit low.
1060A/C request circuit high.
1061A/C select circuit low.
1062A/C select circuit high.
1063A/C clutch circuit low.
1064A/C clutch circuit and power steering input.
1065Lean O2 sensor input.
1066Rich O2 sensor input.
1067Latch relay circuit low.
1068Latch relay circuit high.
1069Speed sensor and ignition module (MPA) circuits.

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

Note. Compare fault code to appropriate diagnostic chart.