ATSG FORD 4R100, Manual

Page: 17 / 120

Diagnostic Trouble Code Chart
Diagnostic Code Description Symptom
P0781
P0782
P0783
P1100
P1101
P1111
P1120
P1124
P1280
P1281
P1500
P1460
P1463
P1464
1-2 shift error because of SSA, SSB, or
internal transmission components.
2-3 shift error because of SSA, SSB, or
internal transmission components.
3-4 shift error because of SSA, SSB, or
internal transmission components.
Throttle Position Sensor voltage lower than
expected.
Throttle Position Sensor out of On-Board
Diagnostics range during KOEO test.
A/C switch error.
Injection Control Pressure (ICP) sensor
circuit failure (Diesel Engine), or out of range
low.
Injection Control Pressure (ICP) sensor
circuit failure (Diesel Engine), or out of range
high.
System Pass. No Codes Detected.
May result in firm shifts.
May result in firm shifts.
Improper gear selection depending
on failure mode and transmission
range selector position. Refer to
shift solenoid operation chart.
Improper gear selection depending
on failure mode and transmission
range selector position. Refer to
shift solenoid operation chart.
Improper gear selection depending
on failure mode and transmission
range selector position. Refer to
shift solenoid operation chart.
MAF sensor system fails to operate in a
normal manner, which may cause a
transmission concern. High EPC pressure. Firm shifts
and engagements. May flash TCIL.
Harsh engagements, firm shift feel,
abnormal shift schedule, abnormal
TCC operation or does not engage.
Failed On: EPC pressure slightly
low with A/C off.
Failed Off: EPC pressure slightly
low with A/C on.
TP sensor (Gas Engines) not at idle
position during KOEO test.
Insufficient or intermittent vehicle speed
input from VSS/ABS. Harsh engagements, firm shift feel,
abnormal shift pattern, unexpected
downshifts may occur at closed
throttle, abnormal TCC operation or
engages only at WOT. May flash
TCIL.
FORD 4R100
Figure 20
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
17