DODGE RAM 1999 Service Repair Manual

Fig. 20: Injector Bank - Known Good - Voltage Pattern
EXAMPLE #3 - VOLTAGE CONTROLLED DRIVER
This known-good waveform pattern, Fig. 21, is from a GM 5.0L
V8 TPI VIN [F]. It was taken during hot idle, closed loop and no load.

Fig. 21: Injector Bank - Known Good - Voltage Pattern
EXAMPLE #4 - CURRENT CONTROLLED DRIVER
From 1984 to 1987, Chrysler used this type injector drive on
their TBI-equipped engines. See Fig. 22 for a known-good pattern.
Instead of the ground side controlling the injector, Chrysler
permanently grounds out the injector and switches the power feed side.
Most systems do not work this way.
These injectors peak at 6 amps of current flow and hold at 1
amp.

Fig. 22: Single Injector - Known Good - Voltage Pattern
EXAMPLE #5 - CURRENT CONTROLLED DRIVER
These two known-good waveform patterns are from a Chrysler 3.
0L V6 VIN [3]. The first waveform, Fig. 23, is a dual trace pattern
that illustrates how Chrysler uses the rising edge of the engine speed
signal to trigger the injectors. The second waveform, Fig. 24, was
taken during hot idle, closed loop, and no load.

Fig. 23: Injector Bank - Known Good - Voltage Pattern

Fig. 24: Injector Bank - Known Good - Voltage Pattern
EXAMPLE #6 - CURRENT CONTROLLED DRIVER
This known-good pattern from a Ford 3.0L V6 PFI VIN [U]
illustrates that a zener diode inside the computer is used to clamp
the injector's inductive kick to 35-volts on this system. See Fig. 25.

Fig. 25: Injector Bank - Known Good - Voltage Pattern
EXAMPLE #7 - CURRENT CONTROLLED DRIVER
This known-good waveform from a Ford 5.0L V8 CFI VIN [F] was
taken during hot idle, closed loop, and no load. See Fig. 26.

Fig. 26: Single Injector - Known Good - Voltage Pattern
EXAMPLE #8 - CURRENT CONTROLLED DRIVER
These two known-good waveform patterns are from a GM 2.0L In-
Line 4 VIN [1]. Fig. 27 illustrates the 78 volt inductive spike that
indicates a zener diode is not used. The second waveform, Fig. 28, was
taken during hot idle, closed loop, and no load.

Fig. 27: Single Injector - Known Good - Voltage Pattern

Fig. 28: Single Injector - Known Good - Voltage Pattern

WHEEL A LIG NM EN T S PEC IF IC ATIO NS

1999 D odge P ic ku p R 1500
1998-99 WHEEL ALIGNMENT
CHRY - Specifications & Procedures - Trucks & FWD Vans
Caravan, Dakota, Durango, Ram Pickup, Ram Van/Wagon,
Town & Country, Voyager
NOTE: Prior to performing wheel alignment, perform visual and
mechanical inspection of wheels, tires and suspension
components. See PRE-ALIGNMENT INSTRUCTIONS in WHEEL ALIGNMENT
THEORY & OPERATION article in GENERAL INFORMATION.
RIDING HEIGHT ADJUSTMENT
CHECKING PROCEDURE
NOTE: Information on vehicles not listed was not available from
manufacturer.
1999 Caravan, Town & Country, & Voyager
Before adjusting alignment, check riding height. Measure
height from inboard edge of fenderwell directly above center of wheel,
unless specified otherwise. Riding height must be checked with vehicle
on level floor, correct size tires properly inflated and fuel tank
full. Bounce vehicle several times and allow suspension to settle.
Visually inspect vehicle for signs of abnormal height from
front-to-rear and side-to-side. Check passenger and luggage
compartments for extra-heavy items and remove if present. Riding
height between left side and right side of vehicle should vary less
than 0.5 (12.7 mm). Information on riding height between front and
rear is not available from manufacturer. See RIDING HEIGHT
SPECIFICATIONS (1999 CARAVAN, TOWN & COUNTRY, & VOYAGER) table. If
riding height is not within specification, check, repair or replace
suspension components.
Dakota & Durango (4WD)
1) Measure and record distance between floor surface and
center of lower suspension arm rear mounting bolt head. Measure and
record distance between floor surface and center of front wheel. See
Fig. 1 . Subtract first measurement from second measurement. On Dakota,
difference between both measurements should be 1.725-1.975" (43.82-50.
16 mm). On Durango, difference between both measurements should be 2.
78-3.02" (70.6-76.7 mm).
2) If necessary, adjust height differential to specification.
Adjust each front suspension arm by rotating torsion bar anchor
adjustment bolt clockwise to raise vehicle and counterclockwise to
lower vehicle. Always raise vehicle to correct height. If vehicle
height is greater than maximum specification, lower height to less
than specification, then back up to specification. After each
adjustment, jounce vehicle before measuring height to determine
effects of adjustment.