AUTOMATIC TRANSMISSION SYSTEM Kick Down Switch Circuit

DESCRIPTION

The kick-down switch turns ON when the accelerator pedal is fully depressed to send a signal to the ECM.

When the kick-down switch is ON, the ECM controls gear shifting according to the programmed shift diagrams.

If a short circuit develops in the kick-down switch, the ECM disregards the kick-down signals and controls shifting at the normal shift points.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (KICK DOWN SWITCH - BODY GROUND)

   
   

   1. Disconnect the kick-down switch connector.

   2. 

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition A45-1 - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. INSPECT KICK DOWN SWITCH ASSEMBLY

   
   

   1. 

      Measure resistance according to the value(s) in the table below when kick-down switch is ON and OFF.

      Standard Resistance
      Tester Connection Condition Specified Condition 1 - 2 Press continuously (Kick-down switch is ON) Below 25 Ω Release (Kick-down switch is OFF) 10 kΩ or higher

   
   

   NG

   REPLACE KICK DOWN SWITCH ASSEMBLY

   OK

3. CHECK HARNESS AND CONNECTOR (KICK DOWN SWITCH - ECM)

   
   

   1. 

      Connect the kick-down switch connector.

   2. Disconnect the ECM connector.

   3. Measure resistance according to the value(s) in the table below when accelerator pedal is fully depressed or not.

      Standard Resistance
      Tester Connection Condition Specified Condition A5-14 (KD) - Body ground Fully depressed (Kick-down switch is ON) Below 25 Ω Release (Kick-down switch is OFF) 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here