Troubleshooting Flowchart - Vehicle Speed Sensor (VSS)
NOTE: Record all freeze data before you troubleshoot'
Po$rible Ctuse
. Disconnected vehicle speed
sensor (VSS) connectol. Short or open in VSS wire' Faulty VSS
@. Make sure lifts, iacks, and sal€tY stands are placed properly lsoe section 1)'
. Set the parking brake securelv, and block the rear wheels'
. iacr upile rront or the vehicle, and support it with safety st'nds'
TCM CONNECTORS
Wire side of female terminals
. OBD ll Scan Tool indicates Code
P1791.. Setf-diagno3is E indicato. light
blinks tour times.
Refer to seclion 23 for vehicle
soeed sensor IVSSI test
Check the VSS Voltage:
1. Raise the vehicle2. Shift the transmission to lEposrtlon.3. Disconnect the A (26P) and B(22P) connectors from the
TCM.4. Turn the ignition switch ON {ll).
5. Rotate the front wheel and
check for the voltage between
the 85 and 413 or A26 termi-
nals. Block the other wheel so
at does not turn
Check for oP€n in the wire
between the 85 terminal and the
vehicle speed sensor {VSS}. lf
wire is OK, check the vSS (see
soction 23).
Does0Vandapprox 5 V or more
appear alternatelY?
Check for loos€ TCM connedors
lI nec€ssary, substitute a known'
good TCM and recheck.
14-243
Glove box removal:
Remove the bolts, then remove the glove box.
>: Bolt locations,2
Installation is the reverse of the removal proceoure
Side air vent/Side defogger trim removal:
SIOE DEFOGGER TRIMSHOPTOWET_Carefully PrY rt at the
then remove it,side edge,
SIDE AIR VENTRemove the driver's dashboard lower
cover, or oPen the glove Dox,
HOOKS
then push the cliPs from each
opening by hand, and Pull it
out. Disconnect the connedors(driver's side).
HOOKS
DASH LIGHTSBRIGHTNESSCONTROLLERCONNECTOR{for some models)
CFUISE CONTROLMASTER SWITCHCONNECTOR(for some models)
Center dashboard lower covel:
1. Remove:
. Driver's dashboard lower cover
. Glove box
2. Remove the screws and bolt, then remove the cen-
ter dashboard lower cover. Disconnect the accesso-
ry socket connector'
>i Boh, screw locations
a>, 1 B>'5
A s*o.e-- I A
@;*;ry'-1'-.J _e)
3. Installation is the reverse of the removal proceoure'
(cont'd)
20-69
LOWER COVER
