1992 MAZDA PROTEGE cruise control

CRUISE CONTROL SYSTEM I
TROUBLESHOOTING GUIDE
General Note
Troubleshooting and inspection of the cruise control is done in two steps. First is the quick, self-diagnostic
inspection using the built-in self-diagnostic function, cruise control switch, and test light. The other is a detailed
inspection of parts using a voltmeter and an ohmmeter.
OSUOTX-130
23UOTX-049
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23UOTX-050
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23UOTX-051
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Step 1: Self-diagnostic Inspection
(Self-diagnosis of malfunction)
Check for condition code(s) memorized in the cruise control
unit by using the cruise control switch and test light.
(Refer to page T-81 .)
If no condition code exists, go to Step 2.
If a condition code(s) is indicated, go to Step 3.
Step 2: Self-diagnostic Inspection
(Quick inspection of cruise control system)
Verify operation codes by using the cruise control switch and
test light. (Refer to page T-82.)
If the operation code is correctly indicated, the part under in-
spection is OK.
If an operation code is not indicated, go to Step 3.
Step 3: Inspection of Circuit and Parts
Check the cruise control wiring and parts with a voltmeter and
an ohmmeter. (Refer to page T-86.)
Adjustment
Checking free play of actuator inner cable
Remove the clip and adjust the nut so that the actuator con-
trol cable play is as follows when the cable is pressed lightly.
Free play of actuator inner cable:
l--5mm (0.039-0.197 in)
T-79

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CRUISE CONTROL SYSTEM
SELF-DIAGNOSTIC INSPECTION
Self-diagnostic Function
The Self-diagnostic function intergrated within the cruise control unit diagnoses the condition of the cruise
control system.
Condition/operation codes are indicated by flashing of the test light connected to the control unit. (Refer to
condition code numbers on page T-80.) This operation continues until canceled.
23UOTX.052
Principle of Code Cycle
Condition and operation codes are determined by flashing of the test light connected to the control unit as
shown below.
03UOTX.140
1. Code cycle break
The time between condition/operation code cycles is 4.0 seconds (the time the lamp is off).
CONDITION/OPERATION
1 CYCLE ‘CODE
d
C,YCLE BREAK
4.0 set -I
97UOTX-18
8
2.
Second dlglt of condition/operation code (ones posltlon)
The digit in the ones position of the condition/operation code represents the number of times the lamp
is on 0.4 second during one cycle.
CONDlTlON/OPERATlON
1 CYCLE CODE
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CODE: 03
1 2 3 CYCLE BREAK
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97UOTX-18
3. First digit of condltlon/operatlon code (tens position)
The digit in the tens position of the condition/operation code represents the number of times the lamp
is on 1.2 seconds during one cycle.
The lamp remains off for 1.6 seconds between the long and short flashes.
CONDlTlON/OPERATlON CODE
CODE: 22
1.6 4.0 set
-I F-m
Se’ SECOND
FIRST DIGIT
DIGIT
1
97UOTX.191
T-80
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CRUISE CONTROL SYSTEM T
L 23UOTX-05
Condition Code Numbers
Self-diagnosis of malfunction
The test light will flash if a malfunction is present.
Inspection Procedure
Self-diagnosis of malfunction
1. Locate the cruise control connector.
2. Connect a 1.4W test light between terminals f and d, with
connector attached to control unit.
Note
l There is no wire in terminal d of the connector. Push
the test light through the connector and touch the
corresponding pin on the control unit.
3. Turn the ignition switch to ON.
4. Turn the cruise control on by pressing the MAIN switch. (The
MAIN indicator lamp will come ON.)
5. Press and hold the RESUMElACCEL switch for more than
three second.
6. The test light will illuminate for 3 seconds and go out for
2 seconds.
7. The self-diagnostic system is activated and the test light will
flash if a problem is present.
8. Make note of the condition code number(s).
(Refer to the chart at the bottom of the page).
9. After retrieving the code(s), drive the vehicle at more than
16 km/h (lOmph), or press the MAIN switch to deactivate
self-diagnosis. (The MAIN indicator lamp will go OFF.)
Note
l The cruise control system will not operate when in
the self-diagnosis mode.
Pattern of output signal
(Test light)
ON
OFF ON
GFF
,“r,- ON
OFF Note
23UOTX-05
l
If there is more than one malfunction, the code numbers will be indicated in numerical order.
T-81 Code
No.
01
05 Possible Cause Action
Defective wiring (Actuator-Cruise control
unit, Stoplight switch-Cruise control unit)
Defective actuator
Defective stoplight switch (For cruise)
STOP fuse blown
Defective wiring (Fuse - Cruise control
unit)
Both stoplight switches (for vehicle and
cruise) are ON simultaneously
Defective SET/COAST. or RESUME/ Inspect cruise control switch
ACCEL switch (Refer to page T-21)
Defective cruise control unit Repair harness
Inspect actuator
(Refer to page T-87)
Inspect stoplight switch
(Refer to page T-87)
Replace fuse
Repair harness
Inspect stoplight switches
(Refer to pages T-47 and
T-87)
Go to troubleshooting
(Refer to page T-83)

CRUISE CONTROL SYSTEM
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23UOTX-056
1 23UOTX-057
Inspection Procedure
Quick inspection of cruise control system
1. Locate the cruise control connector.
2. Connect a 1.4W test light between terminals f and d, with
connector attached to control unit. -1
Note
l There is no wire in terminal d of the connector. Push
the test light through the connector and touch the
corresponding pin on the control unit.
3. Turn the ignition switch to ON.
4. Verify that the MAIN switch is OFF. (The MAIN indicator lamp
is OFF.)
5. Press the RESUMElACCEL switch and the MAIN switch
simultaneously to activate the system inspection. (The MAIN
indicator lamp will come ON.)
6. Operate each switch as described below and verify the oper-
ation codes.
7. Press the MAIN switch to deactivate the system inspection.
(The MAIN indicator lamp will go OFF.)
Note
l The cruise control system will not operate when in
the self-diagnosis mode.
Operation Code Numbers
Inspection of cruise control system
The test light will flash if the system is operating correctly. If the light fails to flash, inspect the system.
Note
l Shift the selector lever to D or R range before operating the inspection. (For ATX)
l Shift to the gear except the neutral position. (For MTX)
Procedure
Press SET/COAST switch Pattern of output signal Code
(Test light) No. Actlon to inspect ON
n II 21 Inspect cruise control switch
(Refer to page T-21)
OFF
Press RESUMElACCEL switch
ON
n 22 inspect cruise control switch
(Refer to page T-21)
OFF
Depress brake pedal
ON
n ml 31 Inspect stoplight switches
(Refer to pages T-47 and
OFF T-88)
Turn ignition switch to ON and shift the ON 35 Inspect inhibitor switch
selector lever to P or N range (For ATX) (Refer to Section K) or clutch
Depress clutch pedal (For MTX) switch (Refer to Section F)
OFF
Drive vehicle above 40 km/h (25 mph) ON 37 Inspect speed sensor or wire
harness
OFF
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1
. . . _
T-82

CRUISE CONTROL SYSTEM T
TROUBLESHOOTING
(F
aCRUISE CONTROL SYSTEM
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MAIN
CRUISE CONTROL MAIN SWITCH
ILLUMINATION L-AMP:
@
REFER TO SECTION I-4 MT
/
5 STOPLI GtHT INSTRUMENT &ii% d CRUISE CONTROL (11
SWITCH Cl ilSTFR (SECTION MAIN “W,ITCH ?a-04 ,
__-- -.
I
fSFCTTC)N F-2
$y .--- 7 ) r’;f”) Jy ;g_$*+
(Fi (F) (F)

B/L (F) EC-AT
_---_--- ------- _ _-___________ ___---__--- ---- --
_____________ __---------------
1 (s) (Mt @ (g
El NE
ROL UN17
(’ TION B-2b)
__
EC-AT CRUISE CONTROL UNIT
Q-01
!
STOP-
LIGHT
SWITCH
Q-O 1
Q-O
P
r CRUISE
CONTROL
SWITCH
R (IF)
--01 CRUISE CONTROL SWITCH (F) Q-O 1 STOPLIGHT
SWITCH (F)
a-03 CRUISE CONTROL UNIT (F) G S Q 0 M ,r,Y E C A
I I
IG/Wl * I P I G I
I B I 3~ IG/RII R Y G/Y G/L
* G/B
F 0 B 3-02 ACTUATOR (F)
Q-04 CRUISE CONTROL
MAIN SWITCH (I)
03UOTX-143
T-83

1
CRUISE CONTROL SYSTEM
Can’t set or control the speed
I
.
Check meter 15A and stop 20
I Short circuit (broken wire) OK
Turn ignition switch to ON and push on main switch
Check for battery voltage on Y wire of cruise control
unit connector NO
Check cruise control main switch (Refer to page T-21)
3 OK
Check for OV on B wire of cruise control unit connector
I Faulty grounding of cruise control unit
I() OK
Is cruise control unit (m) terminal voltage OK?
(Refer to page T-86)
t Check stoplight switch 1 (Refer to page T-52) p OK
Is cruise control unit (h) terminal voltage OK?
(Refer to page T-86) NG Check stoplight switch 2 (Refer to page T-87)
$4 1 OK
Is cruise control unit (g) terminal voltage OK?
(Refer to page T-86)
p OK
Check EC-AT control unit (Refer to Section K) 1
Is cruise control unit (P) terminal voltage OK?
(Refer to page T-86) Check speed sensor
Is cruise control unit (n) terminal voltage OK?
(Refer to page T-86) Check cruise control switch (Refer to page T-21)
0 OK
Is cruise control unit (a, b, c, o) terminal voltage OK?
(Refer to page T-86)
9 OK Check actuator (Refer to page T-87)
Is cruise control unit (e) terminal voltage OK?
(Refer to page T-86) 1
NC2 I
I ..- - Check cruise control main switch (Refer to page T-21)
I I
I 4
e OK
I
Is cruise control unit (9 terminal voltage OK?
(Refer to page T-86) NO i
Cont’d
T-84

CRUISE CONTROL SYSTEM T
Cont’d
Place vehicle on the chassis roller and start the engine
and drive the vehicle at a speed of 50 km/h (31 mph)
Check voltage at (a, b, c, o) terminal of cruise control
unit Va: Battery voltage
Terminal Condition Voltage
MAIN switch ON
a Approx. 9V
SET switch
ON Approx. 0-12V
b MAIN switch ON Approx. 9V
SET switch ON Approx. 0-12V
MAIN switch ON
C Approx. 9V
SET switch ON
Approx. 1V
0 MAIN switch
Approx. 9V
SET switch Va
OBUOTX
Defective actuator (Refer to page T-88) I
Defective actuator cable or cruise control unit
23UOTX-059
CRUISE CONTROL UNIT
Removal / Installation
1 .Remove the blower unit. (Refer to Section U.)
2. Remove the bolts and the cruise control unit.
T-85

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CRUISE CONTROL SYSTEM
s q 0 m
9 e c a
t rpn i j
h
f d b
*
Inspection
Cruise control unit
1. Connect a voltmeter between cruise control unit and ground.
2. Turn the ignition switch ON and check the terminal voltages
as described below.
03UOTX-146
VB: Batterv voltage
c (Output) Actuator
I ov
Approx. 9V
e (Input)
I Cruise control main
I
VB switch (NC)
f (Input)
9 Wv-4 Cruise control main
switch (N.0)
EC-AT control unit
VB
V0
h (Output) (only ATX)
Stoplight switch 2 (N.C) Approx. 9V
i (hW Note I
Inhibitor switch (ATX)
I ov
Approx. 5V Disconnect t
EGI control
Clutch switch (MTX)
ov unit connector Approx. 5V
Cruise control switch
(Set/coast switch) V0
Approx. 5V unit connector
a
S I Battery
I VI3 t
1 Ground I ov Procedure
Ignition switch ON
Main switch ON
Ignition switch ON
Main switch ON
ignition switch ON
Main switch ON
Ignition switch ON
Main switch ON
Ignition switch ON
Main switch ON
“N” or “P” range and main switch ON
Other range and main switch ON
Clutch pedal depressed and main switch ON
Main switch ON
Horn switch OFF
Ignition switch ON
Brake pedal depressed
Main switch ON
While pushing the resumelaccel switch after main switch
ON
Main switch ON
While pushing the set/coast switch after main switch ON
Main switch ON
Brake pedal depressed
While rotating the rear tire
Constant
Constant
23UOTX-OE $0
‘,.__,
_ _-_,’
T-86