Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Celica 1988-1989.1993-1994.2000 Approved Toyota Celica 1993 DOOR_LOC
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DOOR LOCKS - POWER
1993 Toyota Celica
1993 ACCESSORIES/SAFETY EQUIPMENT
Toyota Power Door Locks
Celica
DESCRIPTION & OPERATION
All doors can be locked or unlocked simultaneously using
either front door. Turning driver door lock once will unlock driver
door only, twice will unlock all doors. Door locks can be controlled
by a switches on driver or passenger doors within vehicle, or by
operating each door lock with key or lock knob. Front door(s) can not
be manually locked when key is in ignition switch. See Fig. 1.
Fig. 1: Locating Power Door Lock Components
Courtesy of Toyota Motor Sales, U.S.A., Inc.
TROUBLE SHOOTING
NOTE: Malfunctions that are most likely to occur are shown in
order of their probability.
Door Lock System Does Not Operate.
* Check Fuse(s).
* Check Door Lock Switch Signal.
* Check Door Lock Motor Operation.
* Check Door Lock Control Relay. See POWER DOOR LOCK CONTROL
RELAY CIRCUIT TESTING CHARTS.
* Check Harness & Connectors.
Door Lock System Does Not Operate With Manual Switch.
* Check Door Lock Manual Switch.
* Check Door Lock Control Relay. See POWER DOOR LOCK CONTROL
RELAY CIRCUIT TESTING CHARTS.
* Check Door Lock Motor Operation.
* Check Harness & Connectors.
Door Lock System Does Not Operate With Door Key.
* Check Door Key Lock & Unlock Switch.
* Check Door Lock Control Relay. See POWER DOOR LOCK CONTROL
RELAY CIRCUIT TESTING CHARTS.
* Check Harness & Connectors.
* Check Door Lock Link Disconnected.
Driver Door 2-Key Turns, Key Unlock Function Does Not
Operate.
* Check Door Key Lock & Unlock Switch.
* Check Harness & Connectors.
* Check Door Lock Control Relay. See POWER DOOR LOCK CONTROL
RELAY CIRCUIT TESTING CHARTS.
Key In Ignition Switch Warning, Does Not Operate.
* Check Key Unlock Warning Switch.
* Check Door Courtesy Switch.
* Check Door Lock Switch.
* Check Harness & Connectors.
* Check Door Lock Control Relay. See POWER DOOR LOCK CONTROL
RELAY CIRCUIT TESTING CHARTS.
Only One Door Lock Does Not Operate.
* Check Door Lock Motor Operation.
* Check Harness & Connectors.
TESTING
COMPONENT TESTING
Door Courtesy Switch
Locate door courtesy switch in each door next to power door
lock assembly. Ensure continuity exists between terminal(s) and switch
body with switch pin released (switch ON). Ensure no continuity exists
between terminal(s) and switch body with switch pin pushed in (switch
OFF). If continuity is not as specified, replace switch and retest
system.
Door Key Lock & Unlock Switch
Locate door key lock and unlock switch connector behind door
panel. Disconnect 7-pin connector. Ensure continuity exists between
switch terminals No. 2 and No. 3, with switch in LOCK position. Ensure
continuity exists between switch terminals No. 1 and No. 2, with
switch in UNLOCK position. If continuity is not as specified, replace
switch and retest system.
Door Lock Manual Switch
Locate door lock manual switch in front door. Disconnect 4-
pin connector. Ensure continuity exists between switch terminals No. 2
(White/Black wire) and No. 4 (Blue/Black wire), with switch in lock
position. Ensure continuity exists between switch terminals No. 2 and
No. 3 (Blue wire), with switch in unlock position. Ensure no
continuity in OFF position. If continuity is not as specified, replace
switch and retest system.
Door Lock Motor Operation
Locate front or rear door lock motor and disconnect door lock
motor 7-pin connector. Connect positive battery lead to terminal No. 7
(Blue/White wire) and negative battery lead to terminal No. 5
(Blue/Red wire). Ensure door lock link moves to LOCK position. Reverse
battery leads and ensure door lock link moves to UNLOCK position. If
door lock motor operation is not as specified, replace door lock
assembly and retest system.
Door Unlock Detection Switch
Locate front door lock motor and disconnect door lock motor
7-pin connector. Ensure continuity exists between connector terminals
No. 4 (Green wire) and terminal No. 6 (White/Black wire) with door
unlock detection switch in UNLOCK position. Ensure no continuity with
switch in LOCK position. If continuity is not as specified, replace
door lock assembly and retest system.
Key Unlock Warning Switch
Locate ignition switch 10-pin connector. With key removed
from switch, ensure continuity exists between connector terminals No.
1 and No. 5. If continuity is not present, replace key unlock warning
switch.
Positive Temperature Coefficient (PTC) Thermistor Operation
1) Locate front or rear door lock motor in door. Disconnect
door lock motor 7-pin connector. Connect positive battery lead to door
lock motor terminal No. 7 (Blue/White wire). Connect ammeter positive
lead to door lock motor terminal No. 5 (Blue/Red wire) and ammeter
negative lead to battery negative terminal. Ensure current changes
from 3.2 amps to less than 0.5 amps within 20-70 seconds. If current
changes as specified, go to next step. If current does not change as
specified, replace door lock assembly.
2) Disconnect test leads from terminals and wait at least 60
seconds. Connect positive battery lead to door lock motor terminal No.
5 and battery negative lead to terminal No. 7. Ensure door lock link
moves to LOCK position. If operation is not as specified, replace door
lock assembly and retest system.
DOOR LOCK SWITCH SIGNAL TEST
NOTE: Ensure power door lock harness & connector circuits are okay
before testing door lock switch signal. See appropriate
POWER DOOR LOCK HARNESS & CONNECTOR CIRCUIT TESTING and
POWER DOOR LOCK CIRCUIT VOLTAGE TESTING under POWER DOOR
LOCKS CIRCUIT TESTING CHARTS.
Door Lock Switch Signal
Locate power door lock control relay. Ensure control relay
16-pin connector is connected. Using voltmeter positive lead backprobe
connector terminal No. 3 (Blue/Red wire). Using voltmeter negative
lead backprobe connector terminal No. 4 (Blue/White wire). Ensure
voltage increases from zero to battery voltage for approximately 0.2
seconds with door lock manual switch in UNLOCK position. Reverse
voltmeter leads and ensure voltage increases from zero to battery
voltage for approximately 0.2 seconds with door lock manual switch in
LOCK position. If voltage does not change as specified, replace power
door lock control relay and retest system.
POWER DOOR LOCK CONTROL RELAY CIRCUIT TESTING CHARTS
NOTE: Power Door Locks ECU or Control Relay Circuit Testing Charts
are provided to pinpoint a malfunctioning circuit. Checking
pin voltages at power door locks ECU or Control Relay
connectors will help determine if power door locks ECU or
Control Relay is receiving and sending proper voltage
signals. Using test charts may also help in determining if
there is a short or open in harness or connectors.
NOTE: Unless stated otherwise in testing procedures, perform all
voltage tests using a Digital Volt-Ohmmeter (DVOM) with a
minimum 10-megohm input impedance. Voltage readings may vary
slightly due to battery condition or charging rate.
Fig. 2: Power Door Lock Harness & Connector Circuit Testing
Courtesy of Toyota Motor Sales, U.S.A., Inc.
Fig. 3: Power Door Lock Harness & Connector Circuit Testing
Courtesy of Toyota Motor Sales, U.S.A., Inc.
Fig. 4: Power Door Lock Circuit Voltage Testing
Courtesy of Toyota Motor Sales, U.S.A., Inc.
Fig. 5: Power Door Lock Circuit Voltage Testing
Courtesy of Toyota Motor Sales, U.S.A., Inc.
WIRING DIAGRAMS
Proceed to chassis WIRING DIAGRAMS article in WIRING DIAGRAMS
section.
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