Using The Malfunction Indicator Lamp (Mil) - Jeep Wrangler 1997 Manual

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DESCRIPTION AND OPERATION (Continued)
USING THE MALFUNCTION INDICATOR LAMP (MIL)
(1) Cycle the ignition key On - Off - On - Off - On
within 5 seconds.
(2) Count the number of times the MIL (check
engine lamp) on the instrument panel flashes on and
off. The number of flashes represents the trouble
code . There is a slight pause between the flashes rep-
resenting the first and second digits of the code.
Longer pauses separate individual two digit trouble
codes.
An example of a flashed DTC is as follows:
(3) Lamp flashes 1 time, pauses, and then flashes
5 more times. This indicates a DTC code number 15 .
(4) Lamp flashes 5 times, pauses, and flashes 5
more times. This indicates a DTC code number 55. A
DTC code number 55 will always be the last code to
DIAGNOSTIC TROUBLE CODE DESCRIPTIONS
EMISSION CONTROL SYSTEMS
25- 3
be displayed. This will indicate the end of all stored
codes.
(5) To erase DTC's, use the Erase Trouble Code
data screen on the DRB scan tool.
USING THE VEHICLE ODOMETER
(1)
Cycle the ignition key On - Off - On - Off - On
within 5 seconds.
(2) Read the actual DTC number displayed on the
vehicle odometer. Each number will be displayed
with a slight delay between numbers. A DTC code
number 55 will always be the last code to be dis-
played . This will indicate the end of all stored codes.
(3) To erase DTC's, use the Erase Trouble Code
data screen on the DRB scan tool.
GENERIC
HEX MIL
SCAN DRB SCAN TOOL
CODE CODE
TOOL DISPLAY
DESCRIPTION OF DIAGNOSTIC TROUBLE CODE
CODE
12*
Battery Disconnect Direct battery input to PCM was disconnected within
the last 50 Key-on cycles.
55* Completion of fault code display on Check Engine
lamp.
01 54** P0340 No Cam Signal at No camshaft signal detected during engine cranking.
PCM
02 53** P0601 Internal Controller
PCM Internal fault condition detected.
Failure
05 47*** Charging System Battery voltage sense input below target charging
Voltage Too Low during engine operation . Also, no significant change
detected in battery voltage during active test of
generator output circuit .
06 46*** Charging System Battery voltage sense input above target charging
Voltage Too High voltage during engine operation .
OA 42* Auto Shutdown Relay An open or shorted condition detected in the auto
Control Circuit shutdown relay circuit .
OB 41 *** Generator Field Not An open or shorted condition detected in the
Switching Properly generator field control circuit .
OC 37** P0743 Torque Converter
An open or shorted condition detected in the torque
Clutch Soleniod CKT converter part throttle unlock solenoid control circuit (3
speed auto RH trans . only) .
OF 34*
Speed Control An open or shorted condition detected in the Speed
Solenoid Circuits Control vacuum or vent solenoid circuits .
10 33* A/C Clutch Relay
An open or shorted condition detected in the A/C
Circuit clutch relay circuit .
12 31 ** P0443 EVAP Purge Solenoid
An open or shorted condition detected in the duty
Circuit cycle purge solenoid circuit .
13 27** P0203 Injector #3 Control Injector #3 output driver does not respond properly to
Circuit
the control signal .