STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E.
FLASH CODE:
81 - CRANKCASE MONITOR (CCM) SIGNAL VOLTAGE HIGH
J1587 CODE:
P98 3 - OIL LEVEL CIRCUIT FAILED HIGH
P101 3 - CRANKCASE PRESSURE CIRCUIT FAILED HIGH
NOTE -
This chart is only to be used if:
1)
All basic mechanical checks and physical inspections have been performed with no problem found, and
2)
Diagnosis of DDEC-III was started at step Start-1, pg 3-345.41 and you have now been referred here.
81-1
Multiple Code Check
Were there any other active
No other codes.
Go to 81-2.
codes beside Code 98-101/3?
Yes, any or all
Go to ENG5V-1, page 3-345.413.
of the following codes:
110, 175/3 or 4, 174/3 or 4,
102/3, 94/4.
Yes - but none of the
above.
81.2
Sensor Check
Turn ignition off.
Code 98:101/4 (and any
Go to 81-3.
Disconnect CCM connector.
codes except Code 81).
Turn ignition on.
Start and run engine.
Code 98-101/3 (and any.
Go to 81-5.
Read ACTIVE CODES.
other codes).
81-3
Return Circuit Check
Turn ignition off.
Less than or
Go to 81-4.
Disconnect the engine harness
equal to 5 ohms.
connector at ECM.
Install a jumper wire between pins
Greater than
Return line (ckt #452) is open.
A and B of CCM harness
5 ohms.
Repair open. Then go to 81-30.
connector.
Read resistance between sockets
N1 and Y2 on the engine harness
connector.
81.4
Check CCM Connectors
Inspect terminals at CCM
Terminals and
Replace CCM. Then go to 81-30.
connectors (sensor side and
connectors are okay.
harness side) for damage; bent,
corroded, and unseated pins or
Problem found.
Repair terminals/connectors.
Sockets.
Then go to 81-30.
Change 3 3-345.377
