Pontiac Fiero 1988 Service Manual page 1011

CRUISE CONTROL
S
CO
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TROUBLESHOOTING HINTS
• Try the following checks before doing the
System Diagnosis.
1. Check vacuum hose for leaks, kinks, and/or
restrictions. Also check Cruise Control
Servo linkage. Refer to Section 9 for vac-
uum hose routing and servo linkage
adjustments.
2. If the system works except for the Tap-Up
and Tap-Down functions, replace the
Cruise Control Module (V6 VIN 9).
• Go to System Diagnosis for diagnostic tests.
S Y S T E M CHECK {ROAD TEST)
• Use the System Check Table as a guide to
normal operation.
S Y S T E M CHECK TABLE
ACTION CORRECT RESULT
1. Drive car faster
than 25 mph. Turn
Cruise Switch ON.
Depress Set button
at the end of the
Multi-Function
Lever
Car should main-
tain speed
2. Hold Set button
in and take foot off
accelerator
Car should coast to
a slower speed
3. Release Set
button
Cruise Control
should engage and
hold a slower speed,
if the new speed re-
mains above 25 mph
(Continued in next column)
COMPONENT LOCATION
. Page-Figure
Brake Switch Top of brake pedal support 201-11-A
Cruise Brake Switch On brake pedal support ' 201-11-A
Cruise Clutch Switch On clutch pedal support 201-11-A
Cruise Control Module Under console, near radio 201- 9-D
Cruise Control Servo. Engine compartment, near LH shock tower 201-14-A
Electronic Control Module (ECM)... Between seats, on front of rear bulkhead 201- 5-B
Fuse Block. Behind LH side of I/P 201- 6-D
Multi-Function Lever Top LH side of steering column 201- 8-E
Throttle Position Sensor (VIN 9) LH top of engine, on throttle body 201- 3-A
Throttle Position Sensor (VIN R) . . . Top of engine, right of throttle body 201- 1-A
Transaxle Position Switch LH rear of engine, top of transaxle 201- 2-B
Vacuum Release Solenoid Engine compartment, on LH shock tower 201-14-A
Vehicle Speed Sensor RH end of transaxle 201- 1-A
C203 (15 cavities) Between seats, in front of rear bulkhead 201- 5-A
C235 (4 cavities) Middle of steering column 201- 8-E
C245 (8 cavities) . . . Beneath center console
C255 (8 cavities) Beneath center console 201- 5-A
C500 (34 cavities) Engine compartment, near battery 201- 4-A
G202 Between seats, near rear bulkhead . . . . . . . . 201- 6-A
G504 (VIN 9) LH top of engine, below throttle body 201- 3-A
G504 (VIN R) Top LH front of engine, above Starter Solenoid.. 201- 2-A
S201 Main harness, above steering column 201- 7-A
S213 Main harness, behind rear bulkhead grommet... 201-15-A
S216 Main harness, behind center I/P 201-15-A
S401 Rear lights harness, LH side of back p a n e l . . . . . . 201-14-A
S504 Engine harness, under rear console.. 201- 5-A
S508 (VIN R). Engine harness, under rear console 201- 5-A
S511 (VIN R) Engine harness, top RH rear of engine 201- 1-A
(Continued from previous column)
4. Slide Cruise
Switch to R/A and
hold it there
Car should
accelerate
5. Release Cruise
Switch back to ON
Car should hold new
faster speed
6. Tap brake pedal
Car should coast
slower (Cruise
disengages)
{Continued from previous column)
7. Slide Cruise
Switch momentarily
to R/A
Car should acceler-
ate to former set
speed
8. While cruising,
accelerate, then
remove foot from
accelerator
Car should coast
back to set speed
(Continued in next column)