lets say you get the blink codes working (keyon 3time trick)
what are the codes
here is my list unified 87 to 95 (96 usa is OBD2)98 up canada.
pasted
ACCESSING DIAGNOSTIC TROUBLE CODES
A stored Diagnostic Trouble Code (DTC) can be dis-
played by cycling the ignition key On-Off-On-Off-On
within
three seconds and observing the malfunction
(one book says 3 seconds other says 5) all 3 in 3 seconds is not easy.
indicator lamp. This lamp is displayed on the instru-
ment panel as the CHECK ENGINE lamp (Figs. 5 or
6).
They can also be displayed through the use of the
Diagnostic Readout Box (DRB) scan tool. ( there are some tools sold over the counter, back then that can do OBD1 this car but are not sold now)
The DRB
connects to the data link connector in the engine
compartment (Figs. 7 or 8). For operation of the
DRB, refer to the appropriate Powertrain Diagnostic
Procedures service manual.
CODES
DTC
12- BATTERY FAILED, OR REMOVED./
55- EOC END OF CODES. FLAG<<< this is not any kind of error ever. it means end of message.end of list.only.
List of codes/standard meanings:
11: No ignition reference signal detected during cranking (bad hall effect) OR timing belt skipped one or more teeth; or intermittent loss of either camshaft or crankshaft position sensor (sorry ours is chain cam drive)
CMP or CKP errors. I means the ECU can not see the crankshaft spin.
12: Memory Standby power lost (Battery or computer recently disconnected) (this erases stored codes)
13: No change in Manifold Absolute Pressure sensor (MAP) from start to run,
dead MAP?
14:
MAP sensor circuit open or shorted; voltage too low
15: No speed/distance sensor signal (
VSS dead), see MPH dead? cluster?
16: Loss of battery voltage detected with engine running
17: Engine stays cold too long (bad
thermostat)
21: Oxygen sensor o2 signal out of range, possibly shorted !!
22: Coolant sensor signal out of range (or disconnected to set timing)
23: Intake air temperature signal out of range
(IAT)
24: Throttle position circuit out of range,.
TPS
25: Automatic Idle Speed (AIS) motor driver circuit shorted or target idle not reached, vacuum leak found (IAC named newer car)
26: Peak injector circuit voltage has not been reached
27: Logic module fuel circuit internal problem or TBI injector does not respond properly to control signal
31: Evaporator Purge solenoid circuit open or shorted or Evaporator solenoid circuit.
32: EGR system failure or Power loss lamp open or shorted (ENDED 1991)
33: Air conditioning clutch relay circuit open or shorted ( Also will show up for rigs without AC)
34: Speed control vacuum or vent solenoid circuits open or shorted(means CRUISE controls messed up.)
35: Cooling fan relay circuit open or shorted (none on a 1995)
36: Wastegate control circuit open or shorted,TURBO. DREAMS<< export models?
37: Shift indicator light failure, 5-speed (blown bulb) OR Park/neutral switch failure OR Torque converter unlock circuit open or shorted, A-413 4-speed auto
41: Alternator field control circuit open or shorted (wow smart) very serious.
42: Automatic shutdown relay circuit open or shorted(OR OVERLOADED)
ASD pin A142 overloaded or shorted.<<<<<<
42: Fuel pump relay control circuit (and ASD)
42: Fuel level unit - no change over miles OR Z1 voltage missing when auto shut-down circuit energized
43: Peak primary IGNITION coil current not achieved with max dwell time OR Cylinder misfire
43: Problem in power module to logic module interface
44: No FJ2 voltage present at logic board OR Logic module self-diagnostics indicate problem OR Battery temperature out of range
45: Turbo boost limit exceeded (engine was shut down by logic module)
46: Battery voltage too high during charging or charging system voltage too low, bad ALT?
47: Battery voltage too low and alternator output too low
51: Oxygen sensor stuck at lean position (bad O2 or exh. leaks near by) OR Internal logic module fault ('84 turbo only)
52: Oxygen sensor stuck at rich position (bad 02) OR Internal logic module fault ('84 turbo only)
53: Logic module internal problem
54: No sync pickup signal during engine rotation (turbo only) OR Internal logic module fault ('1984 turbo only)
55: End of codes (most)
outside USA with odd engines there. not sold here.
61: "Baro" sensor open or shorted
62: EMR mileage cannot be stored in EEPROM
62: PCM failure SRI mile not stored
63: Controller cannot write to EEPROM
64: Catalytic converter efficiency failure
65: Power steering switch failure
now read this,
the tool to buy used is this tool seen 2003 to ? (I have one)
top quote online.:
I got the Actron CP9145 six or so years ago for my 94 ZJ. Besides reading and clearing codes, it let you read all the sensors (temperature, vacuum, oxygen etc) the PCM has access to. It also give you some of the calculated values such as injection length and ignition timing. There is an actuator test were you can fire injectors/ ignition coil and test relays without the engine running.
It does not talk to the transmission nor the ABS module. It needs a special OBD1 cable to fit the Jeep (OBD1 is custom on jeeps)
if comms fail too with tool above, the ECU is sick or battery near dead. (fuse blown)
using this tool, 2nd choice after key on 3times fails.
The Blink codes must work
The CEL glowing tells you running , DTC are stored.
key on CEL glows and goes out (PCM CEL self test for the lamp , then you crank , then start and run and CEL must not glow.
my guess is code 42, , very common.
