DIY PGMFI Diagnostics - Code 15 Ignition Output Signal
Disclaimer: The following is provided as a GUIDE ONLY, and neither myself nor Ozhonda take any responsibility for the outcomes of someone else doing the following. You follow these steps at your own risk!
No part of this DIY is to be reproduced with out acknowledgment of the site and author it came from, ie me and ozhonda.com. Do not rip parts off and claim them as your own.
Ignition Output Signal . Ignition Output Signal is generated by the ECU to pulse the ICM ( Ignition Control Module, also known as Igniter ) which collapses the ignition coil to create spark and control Ignition timing as well as dwell angle.
Aim:
Diagnose code 15.
http://ecu-man.com/diy/pgmfi/mil/pgmfi-code-15.gif
Required:
Basic Testing
- Digital Multi Meter
- paper clip
Symptoms
If you are getting code 15, your engine may be running normally. Your ICM could be dying or you could have a problem with power to the Distributor.
Basic Test
Ensure your Distributor is not failing. Listed for metallic type of noises coming from the distributor.
Distributor Pin out Picture
http://ecu-man.com/diy/pgmfi/ios/PGMFI-OBD0-conn.JPG
http://ecu-man.com/diy/pgmfi/ios/PGMFI-OBD1-conn.JPG
wire side of connector
**** Voltage Test ****
Set your multi meter to DC Volts ( 20v scale )
Step 1( Distributor Voltage test )
Connect the Black Lead from your multi meter to the chassis for a good ground. Back probe* the fatter black wire with a yellow trace going to the Distributor.
KOEO* you must get 12v
**** Duty Cycle Test ****
Set your multi meter to Duty% scale
Step 1
Check the ICM for its input duty signal from the ECU, Connect the Black Lead from your multi meter to the chassis for a good ground. Back probe* the ICM with the Red lead while the sensor is connected.
OBDO = Pin 7
OBDI = Pin 7
OBDII = Pin 7
KOER* at idle ( 800RPM ) you should get about 10%
KOER* at 2500RPM you should get about 30%
During Cranking duty should be around 10% - 15%
You can also test the Ignition Output Signal at the ECU connectors
OBDO = B15,B17
OBDI = A21
OBDIIa = A20
OBDIIb = A19,B13
If you do not get a signal, replace the ECU
**** Continuity Test ****
Set your multi meter to continuity. This setting is mostly a picture if a sound .))) when you touch the Red and Black leads together on your meter it should beep.
STEP 1
make sure the Ignition is off and unplug the Distributor Connector and the ECU Connectors for this test
Continuity test between ICM and ECU, Connect your Red multi meter lead on the ICM, Back probe* the Black multi meter lead on the ECU Pin bellow that suits your car.
OBDO = B15,B17
OBDI = A21
OBDIIa = A20
OBDIIb = A19,B13
your multi meter should beep and read short or 000.0ohms. Place the black multi meter lead on a good ground source. You should not get beeping, this is testing for short to ground.
* Notes
KOEO = Key On Engine Off
KOER = Key On Engine Running
Back probe the sensor, use a paperclip and push it into the connector then touch/clip your multi meter lead to the paper clip
Disclaimer: The following is provided as a GUIDE ONLY, and neither myself nor Ozhonda take any responsibility for the outcomes of someone else doing the following. You follow these steps at your own risk!
