Jeep Cherokee 2000 Service Manual - page 1921
(1) Connect the DRB scan tool to data link (diag-
nostic) connector.
(2) Turn the ignition switch on, access Read Fault
Screen. Record all the DTC’s shown on the DRB scan
tool.
(3) To erase DTC’s, use the Erase Trouble Code
data screen on the DRB scan tool.
NOTE: For a list of DTC’s, refer to the following
charts.
DIAGNOSTIC TROUBLE CODE DESCRIPTIONS
(M)
Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was
recorded (depending if required by CARB and/or EPA). MIL is displayed as an engine icon on
instrument panel.
(G)
Generator lamp illuminated
Generic Scan
Tool P-Code
DRB Scan Tool Display
Brief Description of DTC
P0030 (M)
1/1 O2 Sensor Heater Relay Circuit
Problem detected in oxygen sensor heater relay circuit.
P0036 (M)
1/2 O2 Sensor Heater Relay Circuit
Problem detected in oxygen sensor heater relay circuit.
P0106
Barometric Pressure Out of Range
MAP sensor input voltage out of an acceptable range
detected during reading of barometric pressure at key-on.
P0107 (M)
Map Sensor Voltage Too Low
MAP sensor input below minimum acceptable voltage.
P0108 (M)
Map Sensor Voltage Too High
MAP sensor input above maximum acceptable voltage.
P0112 (M)
Intake Air Temp Sensor Voltage Low
Intake air (charge) temperature sensor input below the
minimum acceptable voltage.
P0113 (M)
Intake Air Temp Sensor Voltage High
Intake air (charge) temperature sensor input above the
maximum acceptable voltage.
P0116
A rationatilty error has been detected in the coolant temp
sensor.
P0117 (M)
ECT Sensor Voltage Too Low
Engine coolant temperature sensor input below the
minimum acceptable voltage.
P0118 (M)
ECT Sensor Voltage Too High
Engine coolant temperature sensor input above the
maximum acceptable voltage.
P0121 (M)
TPS Voltage Does Not Agree With
MAP
TPS signal does not correlate to MAP sensor signal.
P0121 (M)
Accelerator Position Sensor (APPS)
Signal Voltage Too Low
APPS voltage input below the minimum acceptable
voltage.
P0122 (M)
Throttle Position Sensor Voltage Low
Throttle position sensor input below the acceptable
voltage range.
P0122 (M)
Accelerator Position Sensor (APPS)
Signal Voltage Too Low
APPS voltage input below the minimum acceptable
voltage.
P0123 (M)
Throttle Position Sensor Voltage
High
Throttle position sensor input above the maximum
acceptable voltage.
P0123 (M)
Accelerator Position Sensor (APPS)
Signal Voltage Too High
APPS voltage input above the maximum acceptable
voltage.
P0125 (M)
Closed Loop Temp Not Reached
Time to enter Closed Loop Operation (Fuel Control) is
excessive.
P0125 (M)
Engine is Cold Too Long
Engine does not reach operating temperature.
P0130 (M)
1/1 O2 Sensor Heater Circuit
Malfunction
Oxygen sensor heater element malfunction.
XJ
EMISSION CONTROL SYSTEMS
25 - 3
DESCRIPTION AND OPERATION (Continued)