1992 MAZDA PROTEGE wiring

CONTROL SYSTEM F
Incorrect voltage
Above OV
Always OV
Always VB
Always Va
Always OV
Always Ve
Always OV
Always VB
Always approx. OV or VB -
-
-
Always OV or Ve -
-
-
Always OV or Vs -
-
- Possible cause
VB: Battery voltage
l Poor connect at ground terminal l Open circuit in wiring from ECU to ground
l Inhibitor switch malfunction (Refer to page K-141) l Short circuit in wirina from inhibitor switch to ECU terminal 3E
l Inhibitor switch malfunction (Refer to page K-141)
. Open circuit in wiring from inhibitor switch to ECU terminal 3E
l Short circuit in wiring from DRL relay to ECU terminal IL l Short circuit in wiring from DRL relay to DRL unit
l Open circuit in wiring from DRL relay to ignition switch
l Parking brake switch always ON l DRL unit malfunction (Refer to page T-33)
l Inhibitor switch malfunction (Refer to page K-141) l Short circuit in wiring from inhibitor switch to ECU terminal 3G
l Inhibitor switch malfunction (Refer to page K-141) l Short circuit in wiring from inhibitor switch to ECU terminal 3G
l Inhibitor switch malfunction (Refer to page K-141) l Short circuit in wiring from inhibitor switch to ECU terminal 3H
l Inhibitor switch malfunction (Refer to page K-141) l Open circuit in wiring from inhibitor switch to ECU terminal 2H
l Refer to Code No.41 Troubleshooting (Refer to page F-103) -
-
-
l Refer to Code No.25 Troubleshooting (Refer to page F-102) -
-
-
l Refer to Code No.34 Troubleshooting (Refer to page F-103) -
-
F-l 65

CONTROL SYSTEM
Ve: Betterv voltaae
Incorrect voltage Possible csuse
Always OV l Main relay (FUEL INJ relay) malfunction (Refer to page F-172) l Open or short circuit in wiring from injector to ECU terminal 3U or 3V
Always Ve
l ECU malfunction
Always OV
Always Ve
l 1-2 shift solenoid valve malfunction (Refer to page K-143) l Short circuit in wiring from solenoid valve to ECU terminal 3W
I
l l-2 shift solenoid valve malfunction (Refer to page K-143) l Ooen circuit in wiring from solenoid valve to ECU terminal 3W
Always OV
l 2-3 shift solenoid valve malfunction (Refer to page K-143) l Short circuit in wirino from solenoid valve to ECU terminal 3X
Always VB
Always OV
l 2-3 shift solenoid valve malfunction (Refer to page K-143) l Open circuit in wiring from solenoid valve to ECU terminal 3X
l 3-4 shift solenoid valve malfunction (Refer to page K-143) l Short circuit in wiring from solenoid valve to ECU terminal 3Y
Always
VB l 3-4 shift solenoid valve malfunction (Refer to page K-143) l Open circuit in wiring from solenoid valve to ECU terminal 3Y
Always OV
l Lockup solenoid valve malfunction (Refer to page K-143) l Short circuit in wiring from solenoid valve to ECU terminal 32
Always Ve
l Lockup solenoid valve malfunction (Refer to page K-143) l Open circuit in wiring from solenoid valve to ECU terminal 32
23UOFX-1 E i0
F-l 67

OUTLINE
OUTLINE
HOW TO USE THIS SECTION
Information regarding removal and installation of electrical equipment is given in SECTION S.
Understanding will be easier if this section is used in conjunction with the WIRING DIAGRAMS.
9MUOTX-008
1.4W or 3.4W
23UOTX.07 1
61G15X-002
69G15X-00 3
63U 15X-005
ELECTRICAL TROUBLESHOOTING TOOLS
Test Light
The test light, as shown in the figure, uses a battery voltage
bulb. The two leads should be connected to probes. The test
light is used for simple voltage checks and to check for open
circuits.
Caution
l When checking the control unit, never use a bulb
over 3.4W.
Jumper Wire
The jumper wire is used for testing by short-circuiting switch
terminals and for verifying the condition of ground connections.
Caution
l Do not connect the jumper wire between a power
source line and body ground because this may
cause burning or other damage to harnesses or
electronic components.
The DC voltmeter is used for measuring circuit voltage. A volt- q Voltmeter
meter with a range of 15V or more is used by connecting the
positive (+) probe (red lead) to the point where voltage is to
be measured, and the negative (-) probe (black lead) to the
body ground.
Ohmmeter
The ohmmeter is used to measure the resistance between two
points in a circuit, and is also used to check for continuity and
diagnosis of short circuits.
Caution
l Do not attempt to connect the ohmmeter to any cir-
cuit to which voltage is applied because this may
burn or otherwise damage the ohmmeter.
T-9

T WARNING SYSTEM
WARNING SYSTEM
WARNING BUZZER AND TIMER
Circuit Diagram
WARNING LAMP
REAR WIPER SW
RASSIVE CONTROL UNIT
Inspection
Remove the CPU and check the voltage or continuity between terminals of joint box and a body ground.
Key reminder alarm does not sound.
VB: Battery voltage
Terminal Connected to Test condition Specification To correct
I
Key reminder switch Key in cylinder VB Check ignition switch and
(ignition switch) Key out bf cylinder ov wiring harness
(Refer to page T-21)
P Ignition switch Ignition switch ON
‘/B Check ignition switch and
wiring harness
(Refer to page T-21)
N Door switch Any door open ov Check door switches and
All doors closed VS wiring harness
(Refer to page T-51)
23UOTX-031
T-58

WARNING SYSTEM
Light-off reminder alarm does not sound.
VB: Battery voltage
Terminal Connected to Test condition Specification To correct
C Headlight switch Headlight switch ON VB Check headlight switch and
wiring harness
(Refer to pages T-27, 28)
P Ignition switch Ignition switch ON VB Check ignition switch and
wiring harness
(Refer to page T-21)
N Door switch Any door open ov Check door switches and
All doors closed V0 wiring harness
(Refer to page T-51)
23UOTX-033
Seat belt alarm does not sound.
VB: Battery voltage
Terminal Connected to Test condition Specification To correct
P ignition switch Ignition switch ON
Vs Check ignition switch and
wiring harness
(Refer to page T-21)
D Seat belt buckle switch Seat belt buckled
00 Check seat belt buckle switch
Seat belt unbuckled
00 and wiring harness
(Refer to page S-102)
23UOTX-034
Seat belt timer does not operate.
VB: Battery voltage
Terminal Connected to Test condition Specification To correct
P Ignition switch Ignition switch ON VE Check ignition switch and
wiring harness
(Refer to page T-21)
23UOTX-035
Passive shoulder belt alarm does not sound.
VB: Battery voltage
Connected to Test condition
Ignition switch Ignition switch Specification
VB
Passive shoulder belt
control unit For 5 seconds after
ignition switch and belt
unbuckled
Other conditions 00
co
IG key illumination timer does not operate.
To correct
I
Check ignition switch and
wiring harness
(Refer to page T-21)
Check passive shoulder belt
control unit and wiring harness
(Refer to page S-104)
23UOTX-036
Ve: Battery voltage
Terminal Connected to Test condition Specification To correct
L IG key illumination Either door open
VB Check bulbs and wiring
harness
N Door switch Any door open ov Check door switches and
All doors closed
VB wiring harness
(Refer to page T-51)
23UOTX-037
T-59

WARNING SYSTEM T
13UOTX-07
63U15X-05
, I//
‘nF -
-
-
FUEL
13UOTX.08C
- CHARGE
13UOTX-08
13UOTX-08
Inspection
Brake system warning lamp
1. Disconnect the connector from the brake fluid level sensor.
2. Connect a jumper wire between “G/Y” and “6” terminal
(body ground).
3. Start the engine and check that the BRAKE warning lamp
illuminates.
Caution
l Be sure that the parking brake is fully released be-
fore checking.
4. If there is no illumination, check the fuse, bulb, and wiring
harness.
Brake fluid level sensor
Connect an ohmmeter to each terminal of the brake fluid lev-
el sensor connector.
Check for continuity when the float is moved up and down.
The sensor is good if there is continuity when the float is be-
low the “MIN” mark, and if there is no continuity when the
float is above the “MAX” mark. If the sensor does not pass
this test, replace it.
Fuel-level warning lamp
1. Disconnect the connector from the fuel tank unit.
2. Connect the connector terminal “W/R” to the body ground.
3. Start the engine and check that the FUEL warning lamp il-
luminates.
4. If there is no illumination, check the fuse, warning lamp, and
wiring harness.
Alternator warning lamp
1. Start the engine, connect the connector terminal “W/B” to
a body ground.
2. Check that the alternator warning lamp illuminates.
3. If there is no illumination, check the warning lamps, wiring
harness and alternator. Replace or repair as necessary.
Engine oil pressure warning lamp
1. Disconnect the connector from the oil pressure switch.
2. Start the engine and connect the connector terminal “Y/R”
to a body ground.
3. Check that the “OIL” warning lamp illuminates. If it does
not, replace the sender switch or repair the wiring harness
if bulb is not burnt out.
T-61

T
I WARNING SYSTEM
Washer fluid warning lamp
1. Disconnect the connector from the washer fluid level sensor.
2. Start the engine and with a jumper wire to connect the con-
nector terminal “a” (LGIW) to a body ground.
3. Check that the washer fluid warning lamp illuminates.
If it does not and the bulb is not burnt out, replace the fluid
level sensor or repair the wiring harness.
13UOTX-08
_-
1 /
J TERMINAL -
13UOTX-08
13UOTX-08
Seat belt warning lamp
1, Remove the CPU.
2. Connect the connector J terminal (joint box side) to a body
ground.
3. Turn ignition switch to ON and confirm that BELT warning
lamp illuminates for about 6 seconds.
4. If there is no illumination, check the fuse, warning readout
and wiring harness.
Check bulb, CPU and wiring harness and switch, repair or
replace as necessary.
Malfunction indicator lamp
1, Connect the “Y/B” wire to a body ground.
2. Start the engine and check that the warning lamp illuminates.
3. If there is no illumination, check the meter fuse, bulb, and
wiring harness between the instrument cluster and the EGI
control unit.
T-62

T INSTRUMENT CLUSTER
Symptom: Tachometer does not operate.
9MUOTX.069
TEST TACHOMETER
23UOTX-040
2E 2G SMUOTX-01
Step 1
1. Remove the instrument cluster. (Refer to page T-69.)
2. Connect a test tachometer between terminals 2E and 2G
of the harness side connector.
Step 2
1. Start the engine.
2. Check that the test tachometer indicates engine speed.
Indicates rpm
Yes
No Action
Replace tachometer
Repair wiring harness
(Instrument cluster - Igniter)
T-66