STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E.
FLASH CODE:
86
J1587 CODE:
P 73 3 - PUMP PRESSURE CIRCUIT FAILED HIGH
(BELOW)
P108 3 - BAROMETRIC PRESSURE CIRCUIT FAILED HIGH · (TBD)
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.
86-1
Multiple Code Check
Were there any other active codes
No other codes.
Go to 86-2.
besides Code 73-3?
Yes, 73-4.
Go to VEH5V-1, pg 3-345.419.
Yes - but not 73-3.
Go to 86-2.
86-2
Sensor Check
Turn ignition off.
Code 73-4 (and any
Go to 86-3
Disconnect the pressure governor
other codes
control sensor connector.
except Code 73/3).
Turn ignition on.
Start engine and operate the
Code 73/3 (and any
Go to 86-5.
pressure governor control in the
other codes).
"PRESSURE" mode.
Read ACTIVE CODES.
86-3
Return Circuit Check
Turn ignition off.
Less than or
Go to 86-4.
Disconnect the vehicle harness
equal to 5 ohms.
connector at the ECM.
Install a jumper wire between pins
Greater than
Return line (ckt #952) is open.
A and B of the PGC sensor
5 ohms or open.
Repair open. Then go to 86-30.
harness connector.
Read resistance between sockets
D3 and C3 on the vehicle harness
connector.
Change 3 3-345.397
