ATSG FORD 4R100, Руководство пользователя

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DIAGNOSTIC CONCERNS WITH PTO
EQUIPPED VEHICLES:
ELECTRICAL COMPONENT DIAGNOSIS
(1)
(2)
(3)
(4)
Always ensure that PTO is turned OFF, before
any diagnostic procedures begin.
Never perform any transmission special tests
(i.e. pressure test, stall test etc.) when the PTO is
turned ON.
If a transmission concern or symptom goes
away with the PTO turned OFF, it is most likely
not a transmission concern.
On Board Diagnostics operate normally during
PTO operation with the exception of the engine
misfire monitor. The circuit checks made by the
PCM and Failure Mode Effect Management
(FMEM) capability will continue. The PTO
must be turned OFF to access Diagnostic
Trouble Codes (DTC's) and perform OBD tests.
Caution: If the batteries are disconnected for any
reason, the PCM "must" have a 7 mile drive cycle at
speeds above 50 MPH, before it remembers that it is
capable of running a PTO
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
8
Copyright © 2003 ATSG
Accelerator Pedal Position Sensor (Diesel Only)
4X4 Low Switch
The Accelerator Pedal (AP) position sensor is
mounted on the accelerator pedal inside the vehicle
and detects the position of the accelerator pedal and
sends this information as a varying voltage signal to
the PCM. The PCM then uses the monitored voltage
level of the AP sensor for control of EPC pressure and
shift scheduling.
The Idle Validation Switch is fed voltage through
fuse number 19, as well as the Transmission Control
Switch, as shown in Figure 7.
If the Idle Validation Switch feed voltage is lost for
any reason, the engine will immediately return to
idle and stay there until feed voltage is restored.
FUSE 19
Red/Yellow
Transmission Control Switch (TCS)
Clutch Pedal Position (CPP) (Std Trans Only)
Idle Validation Switch (IVS) (Diesel Only)
Overhead Trip Computer Module
Generic Electronic Module (GEM)
Instrument Cluster Terminal A12
Instrument Cluster Terminal B11
CENTRAL JUNCTION BOX
Figure 7
Figure 8
The 4X4 Low Switch is used to the PCM that the
transfer case system is operating in LOW range. The
PCM receives the 4X4 Low Switch input signal and
modifies shift scheduling for the lower gear ratio
(See Figure 8).
If the 4X4 LOW indicator fuse is blown, the
transmission will shift according to the 4X4 LOW
shift schedule,
regardless of transfer case lever
position.
PCM PIN 14
Lt. Blue/Black