Shift Interlock Systems Toyota Corolla VI

DESCRIPTION

Transmission is equipped with a cable operated key lock system is used along with a electronically controlled shift lock system. (Scheme 154) Shift lock system prevents shift lever from being moved from Park unless brake pedal is depressed. In case of a malfunction, shift lever can be released by depressing shift lock override button, located near shift lever. Key lock system prevents ignition key from being moved from ACC to LOCK position on ignition switch unless shift lever is in Park.

System consists of brakelight switch, shift lock control switch, shift lock Electronic Control Unit (ECU), shift lock solenoid and shift lock override button. (Scheme 155)

Note. Shift lock Electronic Control Unit is referred to as ECU.

Scheme 154

SHIFT LOCK SYSTEM

With ignition on, when brake pedal is depressed, an input signal is sent from brakelight switch to the ECU. With shift lever in Park, an input signal from shift control switch is input to ECU, indicating shift lever is in Park. The ECU then operates shift lock solenoid, so shift lever can be moved from Park.

KEY LOCK SYSTEM

Note. Key lock system uses a cable for system operation.

A parking lock cable is connected between shift lever and ignition lock assembly for control of key lock system. (Scheme 155)

Scheme 155

ELECTRONIC CONTROL UNIT (ECU)

1. Obtain access to ECU. (Scheme 155) Turn ignition on. Using voltmeter, check voltage between designated terminals on ECU with connector installed on ECU. Voltage should be as specified. (Scheme 156)and (Scheme 157).
2. Turn ignition off. Using ohmmeter, check for continuity between specified terminals. Continuity should be as specified. (Scheme 156)and (Scheme 157).

Note. Connector "A" goes to shift lock solenoid. Connector "B" goes to ignition switch and brakelight switch. Connector "C" goes to shift lock control switch.

Scheme 156

Scheme 157

SHIFT LOCK SOLENOID

1. Disconnect electrical connector from shift lock solenoid. (Scheme 155) Using ohmmeter, measure resistance between electrical terminals of shift lock solenoid.
2. Replace shift lock solenoid if resistance is not within limits. See «SHIFT LOCK SOLENOID RESISTANCE SPECIFICATIONS»(/toyota/corolla/vi-1987-1993/remont/automatic-trans/#shift-interlock-systems) table.
3. Apply battery voltage between electrical terminals of shift lock solenoid. Replace shift lock solenoid if operating sound cannot be heard.

SHIFT LOCK SOLENOID RESISTANCE SPECIFICATIONS

SHIFT LOCK CONTROL SWITCH

1. Disconnect electrical connector from shift lock control switch. (Scheme 155) Note electrical connector terminal identification. (Scheme 158)
2. Using ohmmeter, check continuity of terminals in relation to shift lever. See «SHIFT LOCK CONTROL SWITCH CONTINUITY»(/toyota/corolla/vi-1987-1993/remont/automatic-trans/#shift-interlock-systems) table. Replace switch if continuity is not as specified.

Note. Continuity must be checked in accordance with position of release button on shift lever and shift lever position.

SHIFT LOCK CONTROL SWITCH CONTINUITY

Scheme 158

See also:
• SHIFT LOCK SOLENOID RESISTANCE SPECIFICATIONS