Mazda B-Series 1997 Workshop Manual page 612

ELECTRONIC IGNITION SYSTEM
I
STEP
I
INSPECTION
Yes Go to step 9
Key ON, engine OFF
Measure voltage between Pin 52 at 104 pin
breakout box and J7 at 60 pin breakout box
Is voltage greater than 10.0 volts?
~-
Key ON, engine OFF
No Check connectors, repair open in coil circuit
1
Measure voltage between Pin 78 at 104 pin
breakout box and J7 at 60 pin breakout box
Is voltage greater than 10.0 volts?
Key OFF
Disconnect the coil from the coil tee
Leave El diagnostic harness coil tee connected
to vehicle harness coil connector
Key ON, engine OFF
Measure voltage between J3 and J7 at 60 pin
breakout box
Is voltage less than 0.5 volt?
I
Yes
NO
Go to step 22
Go to step 10
-
Check connectors, repair open in coil circuit
I
Key ON, engine OFF
Measure voltage between J6 and J7 at 60 pin
Yes
breakout box
Is voltaae less than 0.5 volt?
Go to step 11
Key ON, engine OFF
Measure voltage between J10 and J7 at 60
pin breakout box
Is voltage less than 0.5 volt?
Yes Go to step 12
No Go to step 23
Caution:
(2.3L and 3.OL) When performing this test
procedure, remove El diagnostic connector
from CKP sensor and vehicle harness
Reconnect vehicle harness to CKP sensor
Connect El diagnostic harness positive lead
to battery
Yes
connect-incandescent test lamp between J1 and
J3 at 60 pin breakout box
Crank the engine
Does lamp blink consistently and brightly (one blink
per engine revolution)?
- -
Caution:
A-
Yes
(2.3L and 3.OL) When performing this test
procedure, remove El diagnostic connector
from CKP sensor and vehicle harness
Reconnect vehicle harness to CKP sensor
Go to step 13
Yes Go to step 14
Connect incandescent test lamp between J1 and
J6 at 60 pin breakout box
Crank the engine
Does lamp blink consistently and brightly (one blink
per engine revolution)?
No
Caution:
(2.3L and 3.OL) When performing this test
procedure, remove El diagnostic connector from
CKP sensor and vehicle harness
Reconnect vehicle harness to CKP sensor
Replace PCM
Connect test lamp between J1 and J10 at 60 pin
breakout box
Crank the engine
Does lamp blink consistently and brightly (one blink
per revolution)?
Yes
Go to step 15
Replace PCM
Replace coil pack (No high voltage output)
No Replace PCM