11 No ignition reference signal detected during cranking (bad Hall effect) OR loss of camshaft sensor (and, for cars with crankshaft sensors — which does not include the 2.2/2.5 — timing belt skipped a tooth or loss of crankshaft sensor).
Can cause the engine to stop working entirely with no limp-home mode. Note: An anonymous poster wrote, “Code 11 will only be set upon clearing the codes, most commonly by disconnecting the battery. It says in the factory diagnostic manuals that code 11 means no ignition reference signal has been seen since battery disconnect. As soon as the vehicle's engine is cranked, and a reference signal is seen, code 11 will go away immediately on it's own. It also won't be set upon failure of a part such as a hall-effect pick-up plate, or loss of the timing belt. If no reference signal is seen during cranking after a battery disconnect, code 11 will remain. This is a helpful indicator in a no-start condition.” (Chrysler did sometimes change codes depending on the year, so it may be that some of these apply to different years.)
42 Z1 voltage missing when auto shutdown circuit energized or 42 Automatic shutdown relay circuit open or shorted
42 Fuel pump relay control circuit
42 Fuel level unit - no change over miles
The Z1 voltage is the voltage of the circuits fed by the autoshutdown relay. This typically includes fuel pump and switched-battery feed to the ignition coil(s). In my Le Baron, the Z1 circuit leaves the power module and splits into two paths: the fuel pump and the positive side of the ignition coil. Internal to the power module is the auto shutdown relay (in my case, it's a sealed box about 1" by 1"). The output voltage is monitored to determine whether the relay responds correctly. I suspect that the ASD relay (and, therefore, the Z1 circuit) also feeds the fuel injector(s) driver(s) and current sensing circuit, but can't prove this.
I've used the Z1 voltage to test for good power connections to the power module. I connected my OTC 500 multimeter from the battery's positive post to the ignition coil's switched battery terminal and measured the voltage drop using the bar graph to monitor peak voltages. Voltage spikes of around 200 mV to 300 mV are ok -- anything more means tv tuner cleaner time (or replacing the power module). Another thing to check is the maximum voltage drop during the priming pulse. With the old power module, I was losing about 2 volts across the circuit; the replacement is losing about 1/4 volt.
Unconfirmed correction: The Z1 Circuit is used to feed the engine computer; if it is lost, the delayed turnoff will not occur, and restarting will not go well. I forget but think it is the engine flair (speed flair up upon starting) that is lost. It also feeds the injectors and solenoids and other relays.
54 Internal logic module fault ('84 turbo only) - or camshaft sensor/distributor timing
12= battery has been disconnected at some point in time
55= end of cycle or no more codes stored
Hope that helps and best of luck.By the way I'd start with the relay and sensor issues.Please keep me up to date and congrads on the baby due soon , if you need anymore help or advice I'd be glad to help.
