Am working on an 05 amanti with 0320 code (ign speed circuit) and suspected same as complaint was also intermittent tach from customer. i would like your opinions as to what to check and in what order. Thanks for your input. Richard
Here is the overview of the 05 Amanti P0320 code from kiatechinfo.com -
Ignition failure sensor is used to check whether the spark ignition is occurred correctly or not and also used to tachometer drive. The sensor monitors the voltage difference between a resistance which is on the battery circuit for ignition coil. When the ignition coil works properly, the electric current through the resistance is detected as voltage drop. This is confirmed for every ignition event with the crankshaft sensor and the camshaft sensor. If PCM detects a malfunction, no ignition is possible, so the engine would not start. If there is no ignition signal for a predetermined cycle for one or two ignition coils, an ignition coil circuit failure exists.
DTC DETECTING CONDITION
• Current through ignition coil is monitored
• Poor connection
• Open or short in IG failure sensor circuit
• Faulty IG failure sensor
• Faulty PCM
• No current at the 3 IG coil group During 10.7revs (32 ignitions)
MIL On Condition
• 1 driving cycle
Given the age of the vehicle, I would recommending checking all connectors associated with the coil packs, the IG failure circuit, the Cam and Crank Angle sensors, and more generally the condition of the battery cables, neg. batt to ground point, engine ground strap, condition of fuses and relays in the engine compartment fuse box, (in particular those involved with the IGN and PCM circuits),
would inspect/regap or replace all plugs to the minimal recommended gap (.039")
would test each spark plug wire for proper resistance (approx 5.6K oms / meter) - any yellowing, fading, abrasions, wear in boot or HT cap, replace it..
and would scrutinize all coil packs, testing each for proper resistance values, making sure (+12) volts is registering on the hot lead,
to ensure all ignition system components/connections/voltages were in-spec BEFORE delving into the "failure" circuit..
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