2006 MERCEDES-BENZ SPRINTER differential

8W-15 GROUND DISTRIBUTION
Component PageA/C Auxiliary Fan..........................8W-15-4
A/C Auxiliary Fan Relay......................8W-15-12
A/C Compressor Clutch Relay...................8W-15-30
A/C Roof Auxiliary Fan......................8W-15-30
A/C Roof Auxiliary Fan Relay...................8W-15-30
Additional Heat Exchanger....................8W-15-12
Additional Heat Exchanger Relay.................8W-15-12
Additional Heat Exchanger Switch................8W-15-24
Airbag Control Module.......................8W-15-11
Ash Receiver Lamp........................8W-15-22
Automatic Temperature Control Module.............8W-15-24
Auxiliary Heater Control.....................8W-15-24
Battery................................8W-15-8
Battery Relay-Auxiliary......................8W-15-11
Battery-Auxiliary..........................8W-15-11
Blower Motor-Front.........................8W-15-9
Brake Fluid Level Switch......................8W-15-8
Brake Wear Sensor-Left Front...................8W-15-8
Brake Wear Sensor-Left Rear...................8W-15-28
Brake Wear Sensor-Right Front..................8W-15-8
Brake Wear Sensor-Right Rear..................8W-15-28
CTEL Connector..........................8W-15-21
Cabin Heater Module........................8W-15-3
Center High Mounted Stop Lamp.................8W-15-6
Central Timer Module.......................8W-15-15
Cigar Lighter............................8W-15-22
Cigar Lighter Lamp........................8W-15-22
Circulation Pump..........................8W-15-9
Circulation Pump Relay-Cabin Heater Module..........8W-15-12
Clockspring.............................8W-15-10
Controller Antilock Brake....................8W-15-2, 28
Crankcase Heater..........................8W-15-4
Cylinder Lock Switch-Driver...................8W-15-10
D+ Relay No. 1...........................8W-15-12
D+ Relay No. 2...........................8W-15-14
Data Link Connector........................8W-15-10
Daytime Running Lamp Relay-Left Side.............8W-15-13
Daytime Running Lamp Relay-Right Side............8W-15-13
Daytime Running Lamps Relay..................8W-15-13
Differential Lock Solenoid Valve..................8W-15-2
Dome Lamp.............................8W-15-6
Dosing Pump............................8W-15-2
Engine Control Module.......................8W-15-7
Engine Coolant Level Switch....................8W-15-2
Fan Stage 1 Relay.........................8W-15-11
Fog Lamp Relay..........................8W-15-11
Fog Lamp Switch.........................8W-15-22
Fuel Pump.............................8W-15-19
Fuse Block No. 1..........................8W-15-7
Fused Ignition Switch Run-Start Relay..............8W-15-14
G100...............................8W-15-2, 3
G101.................................8W-15-4
G102.................................8W-15-4
G103.................................8W-15-4
G200...........................8W-15-6, 7, 8, 9, 10
G201................................8W-15-11
G202................8W-15-11, 12, 13, 14, 15, 16, 17, 18, 19
G203......................8W-15-20, 21, 22, 23, 24, 25
G300............................8W-15-26, 27, 28
G301................................8W-15-28
G302................................8W-15-28
G303................................8W-15-31
G304................................8W-15-31
G305..............................8W-15-29, 30
Glow Plug Control Module.....................8W-15-2
Hazard Warning Switch.......................8W-15-7
Headlamp Adjust Switch.....................8W-15-22
Headlamp Assembly-Left......................8W-15-3
Headlamp Assembly-Right.....................8W-15-4
Heated Seat Module-Driver....................8W-15-19
Heated Seat Module-Passenger..................8W-15-19
Heated Seat Switch-Driver....................8W-15-25
Heated Seat Switch-Passenger..................8W-15-25
Heater Timer-Auxiliary......................8W-15-24
High Idle Switch..........................8W-15-25
Hood Ajar Switch..........................8W-15-4
Horn Relay.............................8W-15-11
Horn Switch............................8W-15-10
Ignition Lock Switch........................8W-15-10
Instrument Cluster........................8W-15-10
Instrument Panel Socket.....................8W-15-20
Interior Lamp No. 1.........................8W-15-6
Interior Lamp No. 2.........................8W-15-6
Interior Lamp No. 3.........................8W-15-6Component PageInterior Lamp No. 4.........................8W-15-6
Interior Lamp No. 5.........................8W-15-6
Interior Lamp-Left.........................8W-15-6
Interior Lamp-Middle Front...................8W-15-5, 6
Interior Lamp-Middle Rear...................8W-15-5, 6
Interior Lamp-Rear No. 2......................8W-15-5
Interior Lamp-Right.......................8W-15-5, 6
Interior Light Switch.......................8W-15-21
Interior Lighting Connector.....................8W-15-6
Intrusion Sensor No. 1.......................8W-15-6
Intrusion Sensor No. 2.......................8W-15-6
Intrusion Sensor No. 3.......................8W-15-6
Kickdown Switch..........................8W-15-8
Lamp Relay-Left..........................8W-15-13
Lamp Relay-Right.........................8W-15-13
License Plate Lamp No. 1.....................8W-15-27
License Plate Lamp No. 2.....................8W-15-27
Locker Switch No. 1........................8W-15-20
Map/Reading Lamp Switch....................8W-15-21
Marker Lamp Connector......................8W-15-17
Marker Lamp No. 1-Left Front..................8W-15-16
Marker Lamp No. 1-Right Front.................8W-15-16
Marker Lamp No. 2-Left Front..................8W-15-16
Marker Lamp No. 2-Right Front.................8W-15-16
Marker Lamp-Left Center.....................8W-15-17
Marker Lamp-Left Rear......................8W-15-27
Marker Lamp-Right Center....................8W-15-17
Marker Lamp-Right Rear.....................8W-15-27
Master Door Lock Switch.....................8W-15-25
Metering Pump...........................8W-15-18
Multi-Function Switch.......................8W-15-7
Optional Equipment Relay....................8W-15-19
Panic Alarm Switch........................8W-15-20
Parking Brake Switch.......................8W-15-15
Power Mirror Motor-Driver....................8W-15-23
Power Mirror Motor-Passenger..................8W-15-23
Power Mirror Switch........................8W-15-23
Power Window Switch-Driver...................8W-15-23
Power Window Switch-Master...................8W-15-23
Radio................................8W-15-21
Rain Sensor............................8W-15-31
Rain Sensor Control Module..................8W-15-19, 31
Reading Lamp Connector......................8W-15-6
Rear Window Defogger Relay...................8W-15-14
Recirculated Air Solenoid Valve...................8W-15-9
Rollover Switch Assembly......................8W-15-3
Roof A/C Blower..........................8W-15-29
Roof A/C Blower Stage I And Ii Relay...............8W-15-29
Roof A/C Blower Stage I Relay..................8W-15-29
Roof A/C Blower Stage Ii Relay..................8W-15-29
Roof A/C Control Module.....................8W-15-28
Roof A/C Switch..........................8W-15-24
Roof Fan Switch..........................8W-15-21
Roof Thermotronic Control Module................8W-15-30
Seat Belt Switch..........................8W-15-15
Security System Module......................8W-15-15
Sentry Key Remote Entry Module.................8W-15-7
Shifter Assembly..........................8W-15-20
Siren.................................8W-15-9
Steering Angle Sensor........................8W-15-7
TCS Switch.............................8W-15-25
Tail Lamp Assembly-Left.....................8W-15-26
Tail Lamp Assembly-Right.....................8W-15-26
Thermotronic Diode........................8W-15-30
Time Delay Relay.........................8W-15-17
Towing/Intrusion Sensor On/Off Switch..............8W-15-22
Trailer Tow Connector.......................8W-15-28
Trailer Tow Control Module....................8W-15-19
Transmission Control Module...................8W-15-19
Transmission Relay........................8W-15-19
Turn Signal No. 1-Left Front....................8W-15-3
Turn Signal No. 1-Right Front...................8W-15-4
Turn Signal No. 2-Left Front....................8W-15-3
Turn Signal No. 2-Right Front...................8W-15-4
Warm Air Auxiliary Heater Assembly...............8W-15-18
Washer Pump Motor-Front.....................8W-15-4
Water Cycle Valve..........................8W-15-9
Window Defogger Module-Rear..................8W-15-15
Window Defogger Switch-Rear..................8W-15-20
Window Defogger-Left Rear....................8W-15-26
Window Defogger-Right Rear...................8W-15-26
Wiper Motor-Front.........................8W-15-9
Wiper/Turn Signal/Engine Start Control Module.........8W-15-7
VA8W-15 GROUND DISTRIBUTION 8W - 15 - 1

8W-31 TRANSMISSION CONTROL SYSTEM
Component Page
Brake Lamp Switch.................. 8W-31-9
Crankcase Heater.................... 8W-31-3
Data Link Connector............... 8W-31-2, 9
Daytime Running Lamps Relay....... 8W-31-8, 9
Differential Lock Solenoid Valve......... 8W-31-8
EGR Valve......................... 8W-31-3
Electrohydraulic Control Unit........ 8W-31-5, 6
Engine Control Module.............. 8W-31-3, 4
Engine Control Relay................. 8W-31-3
Fuse 2.......................... 8W-31-2, 7
Fuse 4.......................... 8W-31-7, 9
Fuse 7............................ 8W-31-7
Fuse 12............................ 8W-31-8
Fuse 16............................ 8W-31-3
Fuse 17............................ 8W-31-3
Fuse Block No. 1................ 8W-31-3, 7, 9
Fuse Block No. 2.................. 8W-31-2, 7Component Page
Fuse Block No. 3.................... 8W-31-8
G100.............................. 8W-31-8
G202............................ 8W-31-2, 7
G203............................ 8W-31-8, 9
Locker Switch No. 1.................. 8W-31-8
Locker Switch No. 2.................. 8W-31-8
Optional Equipment Relay............. 8W-31-8
Shifter Assembly............... 8W-31-2, 4, 7, 9
Tail Lamp Assembly-Left.............. 8W-31-9
Tail Lamp Assembly-Right............. 8W-31-9
Trailer Tow Connector................ 8W-31-9
Transmission Control Module . . . 8W-31-2, 4, 5, 6, 7
Transmission Relay................ 8W-31-2, 7
Wiper/Turn Signal/Engine Start Control
Module.......................... 8W-31-3
VA8W-31 TRANSMISSION CONTROL SYSTEM 8W - 31 - 1

Component Page
Cigar Lighter...................... 8W-80-30
Cigar Lighter Lamp................. 8W-80-30
Circulation Pump (Cabin Heater
Module)........................ 8W-80-31
Circulation Pump (Rest System)........ 8W-80-31
Circulation Pump Diode.............. 8W-80-31
Clockspring C1..................... 8W-80-31
Clockspring C2..................... 8W-80-31
Controller Antilock Brake............. 8W-80-32
Courtesy Lamp-Driver Door........... 8W-80-33
Courtesy Lamp-Left Sliding Door....... 8W-80-33
Courtesy Lamp-Passenger Door........ 8W-80-33
Courtesy Lamp-Right Sliding Door...... 8W-80-33
Crankcase Heater................... 8W-80-34
Crankshaft Position Sensor........... 8W-80-34
CTEL Antenna Connector............. 8W-80-34
CTEL Connector.................... 8W-80-34
Cylinder Lock Switch-Driver.......... 8W-80-35
Data Link Connector................ 8W-80-35
Differential Lock Solenoid Valve........ 8W-80-35
Dome Lamp....................... 8W-80-35
Door Lock Motor/Ajar Switch
Assembly-Driver C1............... 8W-80-36
Door Lock Motor/Ajar Switch
Assembly-Driver C2............... 8W-80-36
Door Lock Motor/Ajar Switch
Assembly-Left Sliding C1........... 8W-80-36
Door Lock Motor/Ajar Switch
Assembly-Left Sliding C2........... 8W-80-36
Door Lock Motor/Ajar Switch
Assembly-Passenger C1............ 8W-80-36
Door Lock Motor/Ajar Switch
Assembly-Passenger C2............ 8W-80-37
Door Lock Motor/Ajar Switch
Assembly-Rear C1................ 8W-80-37
Door Lock Motor/Ajar Switch
Assembly-Rear C2................ 8W-80-37
Door Lock Motor/Ajar Switch
Assembly-Right Sliding C1.......... 8W-80-37
Door Lock Motor/Ajar Switch
Assembly-Right Sliding C2.......... 8W-80-37
Dosing Pump...................... 8W-80-38
EGR Valve........................ 8W-80-38
Electrohydraulic Control Unit......... 8W-80-38
Engine Control Module C1 (Except
OBD).......................... 8W-80-38
Engine Control Module C1 (OBD)...... 8W-80-39
Engine Control Module C2 (Except
OBD).......................... 8W-80-40
Engine Control Module C2 (OBD)...... 8W-80-41
Engine Control Module C3 (Except
OBD).......................... 8W-80-42
Engine Control Module C4 (Except
OBD).......................... 8W-80-43Component Page
Engine Control Module C5 (Except
OBD).......................... 8W-80-44
Engine Coolant Level Switch.......... 8W-80-44
Engine Coolant Temperature Sensor.... 8W-80-44
Engine Oil Sensor................... 8W-80-44
Evaporator Temperature Sensor........ 8W-80-45
Fog Lamp Switch................... 8W-80-45
Fuel Injector No. 1.................. 8W-80-45
Fuel Injector No. 2.................. 8W-80-45
Fuel Injector No. 3.................. 8W-80-46
Fuel Injector No. 4.................. 8W-80-46
Fuel Injector No. 5.................. 8W-80-46
Fuel Level Sensor................... 8W-80-46
Fuel Pressure Sensor................ 8W-80-47
Fuel Pressure Solenoid............... 8W-80-47
Fuel Pump (OBD)................... 8W-80-47
Fuel Pump Relay (OBD).............. 8W-80-47
Fuel Quantity Control Valve (OBD)..... 8W-80-47
Fuel Shutdown Solenoid.............. 8W-80-48
Fuel Temperature Sensor............. 8W-80-48
Fuse Block No. 1 C1................. 8W-80-48
Fuse Block No. 1 C2................. 8W-80-49
Fuse Block No. 1 C3................. 8W-80-49
Fuse Block No. 1 C4................. 8W-80-49
Fuse Block No. 1 C5................. 8W-80-49
Glow Plug Control Module C1......... 8W-80-50
Glow Plug Control Module C2......... 8W-80-50
Headlamp Adjust Switch............. 8W-80-50
Headlamp Assembly-Left............. 8W-80-51
Headlamp Assembly-Right............ 8W-80-51
Heated Seat Module-Driver........... 8W-80-51
Heated Seat Module-Passenger........ 8W-80-52
Heated Seat Switch-Driver............ 8W-80-52
Heated Seat Switch-Passenger......... 8W-80-52
Heater Timer-auxiliary............... 8W-80-53
High Idle Switch.................... 8W-80-53
Hood Ajar Switch................... 8W-80-53
Horn............................. 8W-80-54
Horn (VTSS)....................... 8W-80-54
Ignition Lock Switch................. 8W-80-54
Instrument Cluster C1............... 8W-80-54
Instrument Cluster C2............... 8W-80-55
Instrument Panel Socket............. 8W-80-55
Intake Air Pressure Sensor (OBD)...... 8W-80-55
Intake Air Temperature Sensor........ 8W-80-56
Interior Lamp No. 1................. 8W-80-56
Interior Lamp No. 2................. 8W-80-56
Interior Lamp No. 3................. 8W-80-56
Interior Lamp No. 4................. 8W-80-56
Interior Lamp No. 5................. 8W-80-57
Interior Lamp-Left.................. 8W-80-57
Interior Lamp-middle Front........... 8W-80-57
Interior Lamp-middle Rear............ 8W-80-57
Interior Lamp-Rear No. 1............. 8W-80-58
Interior Lamp-Rear No. 2............. 8W-80-58
8W - 80 - 2 8W-80 CONNECTOR PIN-OUTSVA

CYLINDER LOCK SWITCH-DRIVER
CAV CIRCUIT FUNCTION
1 16BK DRIVER CYLINDER UNLOCK SENSE
2- -
3 16BR GROUND
4 16RD DRIVER CYLINDER LOCK SENSE
DATA LINK CONNECTOR - BLACK
CAV CIRCUIT FUNCTION
1 20WT/DG K-SKREEM
2- -
3 20DG/YL ENGINE RPM
4 20BR GROUND
5 20BR GROUND
6- -
7 20BL/YL K-ECM
8 20BK/BL/DG FUSED IGNITION SWITCH OUTPUT (RUN-START)
9 20BL/BK K-ABS/SHIFTER ASSEMBLY
10 - -
11 20BL K-TCM/RADIO
12 20GY/DG/RD K-CTM/SSM
13 20BK/RD K-ACM
14 - -
15 20WT/GY K-IC/ATC/HBM/CHM
16 20RD/YL FUSED B(+)
DIFFERENTIAL LOCK SOLENOID VALVE
CAV CIRCUIT FUNCTION
1 18VT/YL DIFFERENTIAL LOCK SOLENOID CONTROL
2 18BR GROUND
DOME LAMP
CAV CIRCUIT FUNCTION
1 16BR GROUND
2 16RD/YL FUSED B(+)
3 16BR/WT FRONT COURTESY LAMPS CONTROL
VA8W-80 CONNECTOR PIN-OUTS 8W - 80 - 35

LOCKER SWITCH NO. 1
CAV CIRCUIT FUNCTION
1 16GY/DG/RD LAMP DRIVER
2- -
3 16BK/RD FUSED OPTIONAL EQUIPMENT RELAY OUTPUT
4 16BR/BK LOCKER SWITCH NO. 2 OUTPUT
5- -
6- -
7 16VT/YL DIFFERENTIAL LOCK SOLENOID CONTROL
8- -
9- -
10 20BR GROUND
LOCKER SWITCH NO. 2
CAV CIRCUIT FUNCTION
1 16BR/BK LOCKER SWITCH NO. 2 OUTPUT
2 16BK/RD FUSED OPTIONAL EQUIPMENT RELAY OUTPUT
LOW FUEL PRESSURE SENSOR - BLACK
CAV CIRCUIT FUNCTION
1 18GY/DG LOW FUEL PRESSURE SENSOR 5 VOLT SUPPLY
2 18GY/YL LOW FUEL PRESSURE SENSOR GROUND
3 18GY/RD LOW FUEL PRESSURE SENSOR SIGNAL
MAP/READING LAMP SWITCH
CAV CIRCUIT FUNCTION
1 16GY/DG/RD LAMP DRIVER
2- -
3 16RD/YL FUSED B(+)
4- -
5- -
6- -
7 16RD/YL MAP/READING LAMP SWITCH OUTPUT
8- -
9- -
10 16BR GROUND
8W - 80 - 62 8W-80 CONNECTOR PIN-OUTSVA

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Daytime Running Lamps Relay (Relay
Block)BK Under Driver Seat N/S
Differential Lock Solenoid Valve BK Underbody 51
Dome Lamp BK Dome Area 42
Door Jamb Switch-Driver Driver Door 43
Door Jamb Switch-Left Sliding Left Sliding Door N/S
Door Jamb Switch-Passenger Passenger Door 43
Door Jamb Switch-Right Sliding Right Sliding Door 30
Door Jamb Switch-Tailgate Tailgate N/S
Door Lock Motor/Ajar Switch Assembly -
Driver C1Driver Door 43
Door Lock Motor/Ajar Switch Assembly -
Driver C2Driver Door 43
Door Lock Motor/Ajar Switch Assembly - Left
Sliding C1Left Sliding Door 46
Door Lock Motor/Ajar Switch Assembly - Left
Sliding C2Left Sliding Door 46
Door Lock Motor/Ajar Switch Assembly -
Passenger C1Passenger Door 46
Door Lock Motor/Ajar Switch Assembly -
Passenger C2Passenger Door 46
Door Lock Motor/Ajar Switch Assembly -
Rear C1Right Sliding Door 52
Door Lock Motor/Ajar Switch Assembly -
Rear C2Right Sliding Door 52
Door Lock Motor/Ajar Switch Assembly-Right
Sliding C1Cargo Door 45
Door Lock Motor/Ajar Switch Assembly-Right
Sliding C2Cargo Door 45
Dosing Pump Engine Compartment N/S
EGR Valve Engine Compartment 14
Engine Control Module C1 (Except OBD) BK Instrument Panel 22
Engine Control Module C1 (OBD) BK NS
Engine Control Module C2 (Except OBD) BK Instrument Panel 22
Engine Control Module C2 (OBD) BK NS
Engine Control Module C3 (Except OBD) BK Instrument Panel 22
Engine Control Module C4 (Except OBD) BK Instrument Panel 22
Engine Control Module C5 (Except OBD) GY Instrument Panel 22
Engine Control Relay (Fuse Block No.1 NS
Engine Coolant Level Switch BK Engine Compartment 2, 8
Engine Coolant Temperature Sensor BK Engine Compartment 13
Engine Oil Sensor BK Engine Compartment 14
Evaporator Temperature Sensor WT Instrument Panel-Right 33
Fan Stage 1 Relay (Relay Block) BK Under Driver Seat N/S
Fog Lamp Relay (Relay Block) BK Under Driver Seat N/S
Fog Lamp Switch BK Instrument Panel 25
8W - 91 - 4 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONVA

FUEL DRAIN TUBES
DIAGNOSIS AND TESTING - FUEL SUPPLY
RESTRICTIONS
LOW - PRESSURE LINES
Fuel supply line restrictions can cause starting
problems and prevent engine from accelerating. The
starting problems include; low power and/or white
fog like exhaust.
Test all fuel supply lines for restrictions or block-
age. Flush or replace as necessary.
HIGH - PRESSURE LINES
CAUTION: High pressure lines cannot contact each
other or other components. Do not attempt to weld
high-pressure fuel lines or to repair lines that are
damaged. High pressure lines must be replaced at
each disassembly. Use only recommended lines
when replacement of high-pressure fuel line is nec-
essary.
Restricted (kinked or bent) high-pressure lines can
cause starting problems, poor engine performance,engine mis-fire and white smoke from exhaust (Refer
to 14 - FUEL SYSTEM - WARNING).
FUEL FILTER
DESCRIPTION
The fuel filter was designed for improved high alti-
tude operation and for better re-start after the fuel
tank has been completely emptied. The water drain
plug and water in fuel (WIF) sensor are located on
the top of the filter. Water is drained by using the in-
tank electric fuel pump to generate flow (attach a
hose to the drain plug). The filter has a pressure dif-
ferential of 200±300 mbar (2.9 psi.) when new. When
dirty, the pressure differential rises to 800 mbar (11.6
psi.) (Fig. 2).
REMOVAL
WARNING: NO SPARKS, OPEN FLAMES OR SMOK-
ING. RISK OF POISONING FROM INHALING AND
SWALLOWING FUEL. RISK OF INJURY TO EYES
AND SKIN FROM CONTACT WITH FUEL. POUR
FUELS ONLY INTO SUITABLE AND APPROPRI-
ATELY MARKED CONTAINERS. WEAR PROTECTIVE
CLOTHING.
CAUTION: DO NOT bend, twist or cut the fuel hose
clamps. The fuel hose clamps through out the fuel
system are reusable when using special tool #9539.
Orginal clamps must be used when servicing the
fuel system.
(1) Disconnect negative battery cable.
(2) Disconnect the water in fuel (WIF) sensor har-
ness connector (Fig. 2).
(3) Release the fuel inlet and outlet hose clamps
using special tool #9539 at the fuel filter (Fig. 2).
(4) Remove fuel filter retaining bracket bolt and
remove fuel filter (Fig. 2).
(5) Separate the WIF sensor from the fuel filter
(Fig. 2)
FUEL LINE WRENCH-9285
FUEL LINE PLIERS-9539
14 - 10 FUEL DELIVERYVA

DIAGNOSIS AND TESTING
AUTOMATIC TRANSMISSION
CAUTION: Before attempting any repair on a NAG1
automatic transmission, check for Diagnostic Trou-
ble Codes with the appropriate scan tool.
Transmission malfunctions may be caused by these
general conditions:
²Poor engine performance.
²Improper adjustments.
²Hydraulic malfunctions.
²Mechanical malfunctions.
²Electronic malfunctions.
²Transfer case performance (if equipped).
Diagnosis of these problems should always begin
by checking the easily accessible variables: fluid level
and condition, gearshift cable adjustment. Then per-
form a road test to determine if the problem has been
corrected or if more diagnosis is necessary.
PRELIMINARY
Two basic procedures are required. One procedure
for vehicles that are drivable and an alternate proce-
dure for disabled vehicles (will not back up or move
forward).
VEHICLE IS DRIVABLE
(1) Check for transmission fault codes using the
appropriate scan tool.
(2) Check fluid level and condition.
(3) Adjust gearshift cable if complaint was based
on delayed, erratic, or harsh shifts.
(4) Road test and note how transmission upshifts,
downshifts, and engages.
VEHICLE IS DISABLED
(1) Check fluid level and condition.(2) Check for broken or disconnected gearshift
cable.
(3) Check for cracked, leaking cooler lines, or loose
or missing pressure-port plugs.
(4) Raise and support vehicle on safety stands,
start engine, shift transmission into gear, and note
following:
(a) If propeller shaft turns but wheels do not,
problem is with differential or axle shafts.
(b) If propeller shaft does not turn and transmis-
sion is noisy, stop engine. Remove oil pan, and
check for debris. If pan is clear, remove transmis-
sion and check for damaged driveplate, converter,
oil pump, or input shaft.
(c) If propeller shaft does not turn and transmis-
sion is not noisy, perform hydraulic-pressure test to
determine if problem is hydraulic or mechanical.
ROAD TESTING
Before road testing, be sure the fluid level and con-
trol cable adjustments have been checked and
adjusted if necessary. Verify that all diagnostic trou-
ble codes have been resolved.
Observe engine performance during the road test.
A poorly tuned engine will not allow accurate analy-
sis of transmission operation.
Operate the transmission in all gear ranges. Check
for shift variations and engine flare which indicates
slippage. Note if shifts are harsh, spongy, delayed,
early, or if part throttle downshifts are sensitive.
Slippage indicated by engine flare, usually means
clutch, overrunning clutch, or line pressure problems.
A slipping clutch can often be determined by com-
paring which internal units are applied in the vari-
ous gear ranges. The Clutch Application chart
CLUTCH APPLICATION provides a basis for analyz-
ing road test results.
CLUTCH APPLICATION
GEAR RATIO B1 B2 B3 K1 K2 K3 F1 F2
1 3.59 X* X X* X X
2 2.19 X X X* X
3 1.41 X X X
4 1.00 X X X
5 0.83 X X X X*
N N/A X X
R 3.16 X* X X X
R - Limp In 1.93 X X X
* = The shift components required during coast.
VAAUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 39