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E N G I N E !
Cruise Control Communication Circuit Troubleshooting (A/T)
1. Start the engine.
2. T u r n on the cruise control main switch, then drive
the vehicle to speeds over 25 m p h (40 km/h) w i t h
the cruise control.
Does the cruise control
operate?
YES— Go to step 3.
N O - Check the cruise control unit (see page 4-46)
or cruise control actuator. •
3. Turn the ignition switch OFF.
4. Disconnect Powertrain Control Module (PCM)
connector A (32P) and cruise control unit connector.
5. Check for continuity between the PCM connector
terminal A5 and body ground.
P C M C O N N E C T O R A (32P)
B L U / G R N
/
2
3
4
5
6
/
8
9
10
/
12 13 14 15
/
17
18 19 20
21
23 24
25 26 27
28 29 30
32
W i r e s i d e o f f e m a l e t e r m i n a l s
Is there
continuity?
YES — Repair a short in the wire between the PCM
connector terminal A5 and the cruise control unit
connector terminal No. 8 . B
NO—Go t o step 6.
6. Reconnect PCM connector A (32P) and cruise
control unit connector.
7. Turn the ignition switch ON (II).
8. Connect a voltmeter between cruise control unit
14P connector terminal No.8 and body g r o u n d .
Test-drive the vehicle at speeds over 2 5 m p h
(40km/h) w i t h the cruise control set, and watch the
voltmeter.
C R U I S E C O N T R O L U N I T 1 4 P C O N N E C T O R
1
2
3
5
6
7
8
9
10
11
12
13
14
B L U / G R N
W i r e s i d e o f f e m a l e t e r m i n a l s
Is there about 1 V?
Y E S - G o t o step 9.
NO— Replace the cruise control unit. •
9. Connect a voltmeter between PCM connector
terminal A5 and body g r o u n d . Drive the vehicle at
speeds over 25mph (40km/h) w i t h the cruise
control set, and watch the voltmeter.
P C M C O N N E C T O R A (32P)
B L U / G R N
/
2
3
4
5
6
/
8
9
10
/
12 13 14 15
/
17 18 19 20
21
23 24
25 26 27
28 29 30
32
W i r e s i d e o f f e m a l e t e r m i n a l s
Is there about 1 V?
Y E S - C h e c k for loose connections of the BLU/GRN
wire between the cruise control unit and the PCM. If
necessary replace the PCM and recheck. (see page
1 1 - 3 ) . •
NO — Repair open in the w i r e between the A5
terminal and the cruise control unit connector
terminal No. 8 . B
4-45
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Table of Contents
Troubleshooting
