Mazda B-Series 1997 Workshop Manual page 617

ELECTRONIC IGNITION SYSTEM
STEP INSPECTION
1
ACTION
I
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
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 enaine revolution)?
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
Yes
/
Replace right coil pack
-
I
/
Connect incandescent test lamp between J1 and
N,G~P~-
J6 at 60 pin breakout box
Crank the engine
Does lamp blink consistently and brightly (one blink
;
per engine revolution)?
Disconnect coil from coil tee, leave El diagnostic
harness connected to vehicle harness coil connector
Go to step
54
Measure resistance between J7 and J3 at
60 pin breakout box
Is resistance less than 2k ohms?
Key OFF
Disconnect PCM from vehicle harness
connector
No Replace right coil pack
I I
Measure resistance between J7 and J3 at
60 in breakout box
Yes
No
Check connectors, repair short in coil circuit to ground
Replace PCM
Is resistance areater than 1 O k ohms?
Key OFF
Disconnect coil from coil tee, leave El diagnostic
Yes Go to step
56
I I
harness connected to vehicle harness coii connector1
1
Measure resistance between J7 and J6 at
60 pin breakout box
- -
~ i ~ e p ~ u c e right coil pack
I
/
Is resistance less than 2k ohms?
1 1 I
Key OFF
Disconnect PCM from vehicle harness
Yes Replace PCM
I
connector
Measure resistance between J7
and J6 at 60 pin breakout box
No
Check connectors,repair short in coil circuit to ground
+-
Is resistance-greater than 1 O k ohms?
Key OFF
Disconnect PCM from vehicle harness
connector
Key ON, engine OFF
Measure voltage between J3 and J7 at 60
pin breakout box
Is voltage less than
0.5
volt?
- .
Key OFF
Disconnect PCM from vehicle harness
connector
Yes Replace PCM
T---
No
Key ON, engine OFF
Measure voltaae between J 6 and J7 at 60
Check connectors, repair short in coil circuit to power
No
Check connectors. repair short in coil circuit to ground
pin breakout b<x
Is voltage less than 0.5 volt?
MG1097-B7 6BUOGX-003