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TM9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE:
12
J1587 CODE:
P187
3-
POWER TAKE OFF (PTO) INPUT FAILED HIGH (HIGH VOLTAGE)
(ALSO CALLED VARIABLE SPEED GOVERNOR - VSG)
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-lll was started at step START-1, pg H-25 and you have now been referred here.
STEP/SEQUENCE
12-1
Multiple Code Check
l Were there any other active codes
besides Code 187/3?
12-2 Sensor Check
l Turn ignition off.
l Unplug the vernier control
connector.
l Turn ignition on.
l Read active codes.
12-3 Return Circuit Check
l Transmission in neutral.
l Turn ignition off.
l install a jumper wire between pin
A and pin B of the vernier control
connector.
l Disconnect the vehicle harness
connector at the ECM.
l Turn ignition on.
l Position left ENGINE SPEED
CONTROL stitch to HIGH
ENGINE IDLE and press PUSH
TO LOCK ENGINE @ HIGH IDLE
switch.
l Read resistance between sockets
C3 (952) and D1 (510) on the
vehicle harness connector.
12-4
Check Vernier
Control Connectors
l Inspect terminals at the vernier
control connectors (sensor side
and harness side) for damage;
bent, corroded, and unseated
pins or sockets.
No other active codes
Yes, either code
91/3 or 4.
Yes - but none
of the above.
Any codes
except Code 187/3.
Code 187/3 (and any
other codes).
Less than or
equal to 5 ohms.
Greater than
5 ohms or open.
Terminals and
connectors are okay.
Problem found.
WHAT TO DO NEXT
Go to 12-2.
Go to VEH5V-1 , page H-247.
Go to 12-2.
Go to 12-3.
Go to 12-5.
Repair open. Then go to 12-30.
(para 7-76). Then go to 12-30.
Repair terminals/connectors
(para 7-77). Then go to 12-30.
H-111
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