light MITSUBISHI GALANT 1989 Service Manual PDF

AUTO-CRUISE CONTROL SYSTEM - Troubleshooting13-363
With scan toolri++, lighter ;
03A0258
TSB Revision
After the diagnostic trouble codes in the memory are
erased, if (when the power supply of the electronic controlunit is switched ON once again) the power supply of the
electronic control unit is normal, the on-board diagnostic
output code display will be as below, regardless of
whether the system condition is normal or not.
@ If a scan tool is used: “NORMAL!!” will be displayed.
@ If a voltmeter is used:Continuous ON/OFF signals will be displayed at 0.5
second intervals.
(Refer to the figure at the left.)
INPUT CHECKING
Input checks should be made when the auto-cruise control
system cannot be set and when it is necessary to check
(when a malfunction related to the auto-cruise
contra! system
occurs) whether or not the input signals are normal.
NOTE
1. If inspection of on-board diagnostic is necessary, confirm diagnostic trouble code first and conduct input check.
2.Input check can be conducted by set operations. On-board
diagnostic terminal outputs display patterns.
3.Display codes are displayed only if the circuit is normal ac-
cording to the conditions shown in the table on the next
paw
WITH SCAN TOOL
(1) The setting of the scan tool is the same as for the on-board diagnostic check.
(2) Turn the ignition switch to ON and switch OFF the main switch.
(3) Select the cruise control system from the scan tool’s menu.
(4) With the set switch ON, switch ON the main switch, and
then, within one second, switch ON the resume switch.
(5) Select the diagnostic trouble code from the scan tool’s
menu.
(6) Perform each input operation according to the input check table (on the next page) and read the codes.
(7) Switch the main switch OFF.
WITH VOLTMETER
(1) The voltmeter is set in the same way as for the on-board diagnostic check.
(2) Turn the ignition switch to ON and switch OFF the main switch.
(3) With the set switch ON, switch ON the main switch, and then, within one second, switch ON the resume switch.
(4) Perform each input operation according to the input check
table (on the next page) and read the codes.
(5) Switch the main switch OFF.

13-364AUTO-CRUISE CONTROL SYSTEM - Troubleshooting
INPUT CHECK TABLE
Code Display patterns (output codes) Input operationCheck resultsNo.(use with voltmeter)
21SET switch ONSmE,: switch circuit nor-
RESUME switch ON RESUME switch circuit
normal
23

Each cancel switch ONEach cancel circuit nor-
1. Stop light switch (brake pedalmal
depressed)
2. Clutch pedal position switch(clutch pedal depressed)
St;p light switch nor-
>
3. Park/neutral position switch
(shift lever to “N” range)
>

Stop light switch ON (brake pedal
depressed)
24
25
n r
Driving at approximately to 40 When both No.4 and
km/h (25 mph) or higherNo.5 can be confirmed,
vehicle-speed sensor
circuit normal.
n r
Driving at less than approximately
to 40 km/h (25 mph) or stopped
26I. Clutch pedal position switchsNJFy;h pedal depressed)
2. Park/Neutral position switch
ON (shift lever to “N” or “P”
range)
Clutch pedal positionswitch, park/neutral position switch normal
28Throttle position sensor output
voltage over 1.5V (when the ac-celerator pedal is pressed more
than half way)
$yro;e position sensor
Closed throttle position switch Closed throttle position
OFF (accelerator pedal depressed)switch normal
NOTE1. Each code will be displayed in an order of priority beginning from No\
. 1.If there is no display, it is possible that there is a malfunction of th\
e ECU power-supply circuit or the SET and/orRESUME switch, so check according to check charts 1.2 and 3 (P.13-339,340,341,354,355).2. Continue each input operation until the output code is emitted.If no output codes are emitted for inputs even though the display patter\
n is repeated two or more times, there is amalfunction of the switch sensor.3.When each input operation is performed and the signals for the condition\
s are received by the computer, eachoutput code will be repeatedly displayed in the sequence of priority for\
as long as that signal continues.4.If, during the display of output codes, the input operation is canceled \
(if, for example, the SET switch is set from ONto OFF), the code will be displayed for one cycle of the display, but w\
ill not be displayed during the next cycle.This makes it possible, therefore, to check the OFF condition (existenc\
e of not of a short-circuit of the input line orthe switch).
TSB Revision

AUTO-CRUISE CONTROL SYSTEM - Troubleshooting13-365
AUTO-CRUISE CONTROL RELATED HARNESSES


16AO621
1 - Starter motor 7 - Clutch pedal position switch 14 - Overdrive switch2 - Park/neutral position switch8 - Column switch
15 - Control harness and body harness coupling
3 - Actuator , 9 - lgnrtion switch
16 - Control harness and body harness CouplingAuto-cruise pump10 - Stop light switch 17 - Diode 11 - Accelerator control unit16 - MFI control module4 - 4 A/T control module12 - Auto-cruise control unit
5
- Combination meter13 - On-board diagnostic output
6 - Combination meterterminal
TSB Revision

‘13-372AUTO-CRUISE CONTROL SYSTEM - Troubleshooting
CIRCUIT DIAGRAM (CONTINUED)
AUTO CRUISECONTROL ACTUATOR
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TSB Revision

13-374AUTO-CRUISE CONTROL SYSTEM - Troubleshooting
CIRCUIT DIAGRAM (CONTINUED)
J/B

AUTO CRUISECONTROL ACTUATOR
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TSB Revision

13-376AUTO-CRUISE CONTROL SYSTEM - Trotibleshooting
CIRCUIT DIAGRAM (CONTINUED)
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TSB Revision

AUTO-CRUISE CONTROL SYSTEM - Troubleshooting13-379
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1 TSB Revision1

13-382AUTO-CRUISE CONTROL SYSTEM - Troubleshooting
CIRCUIT DIAGRAM (CONTINUED)

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TSB
Revision

13-384
AUTO-CRUISE CONTROL SYSTEM - Troubleshooting
CIRCUIT DIAGRAM
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X35-AC-H1538-NY
1
TSB Revision1

13-386
AUTO-CRUISE CONTROL SYSTEM - Troubleshooting
CIRCUIT DIAGRAM
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1 TSB Revision