Jeep Cherokee 2000 Service Manual - page 1930
(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.
P1389
No ASD Relay Output Voltage At
PCM
No Z1 or Z2 voltage sensed when the auto shutdown
relay is energized.
P1389 (M)
No ASD Relay Output Voltage at
PCM
An open condition detected In the ASD relay output
circuit.
P1390
Timing Belt Skipped 1 Tooth or More
Relationship between Cam and Crank signals not correct
P1391 (M)
Intermittent Loss of CMP or CKP
Loss of the Cam Position Sensor or Crank Position
sensor has occurred. For PL 2.0L
P1398 (M)
Mis-Fire Adaptive Numerator at Limit
PCM is unable to learn the Crank Sensor’s signal in
preparation for Misfire Diagnostics. Probable defective
Crank Sensor
P1399
Wait To Start Lamp Cicuit
An open or shorted condition detected in the Wait to Start
Lamp circuit.
P1403
No 5V to EGR Sens
Loss of 5v feed to the EGR position sensor.
P01475
Aux 5 Volt Supply Voltage High
Sensor supply voltage for ECM sensors is too high.
P1476
Too Little Secondary Air
Insufficient flow of secondary air injection detected during
aspirator test (was P0411)
P1477
Too Much Secondary Air
Excessive flow of secondary air injection detected during
aspirator test (was P0411).
P1478
Battery Temp Sensor Volts Out of
Limit
Internal temperature sensor input voltage out of an
acceptable range.
P1479
Transmission Fan Relay Circuit
An open or shorted condition detected in the transmission
fan relay circuit.
P1480
PCV Solenoid Circuit
An open or shorted condition detected in the PCV
solenoid circuit.
P1481
EATX RPM Pulse Perf
EATX RPM pulse generator signal for misfire detection
does not correlate with expected value.
P1482
Catalyst Temperature Sensor Circuit
Shorted Low
Catalyst temperature sensor circuit shorted low.
P1483
Catalyst Temperature Sensor Circuit
Shorted High.
Catalyst temperature sensor circuit shorted high.
P1484
Catalytic Converter Overheat
Detected
A catalyst overheat condition has been detected by the
catalyst temperature sensor.
P1485
Air Injection Solenoid Circuit
An open or shorted condition detected in the air assist
solenoid circuit.
P1486
Evap Leak Monitor Pinched Hose
Found
LDP has detected a pinched hose in the evaporative hose
system.
P1487
Hi Speed Rad Fan CTRL Relay
Circuit
An open or shorted condition detected in the control
circuit of the #2 high speed radiator fan control relay.
P1488
Auxiliary 5 Volt Supply Output Too
Low
Auxiliary 5 volt sensor feed is sensed to be below an
acceptable limit.
P1488
5 Volt Supply Voltage Low
Sensor supply voltage for ECM sensors is too low.
P1489
High Speed Fan CTRL Relay Circuit
An open or shorted condition detected in the control
circuit of the high speed radiator fan control relay.
P1490
Low Speed Fan CTRL Relay Circuit
An open or shorted condition detected in control circuit of
the low speed radiator fan control relay.
25 - 12
EMISSION CONTROL SYSTEMS
XJ
DESCRIPTION AND OPERATION (Continued)