Inspection Procedure

1. Disconnect the B31 connector from the ECM.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   B31-56 (D) - Body ground	Clutch pedal depressed	Below 1 V
   	Clutch pedal released	11 to 14 V

NG : Go to step 2 

Fig 1: Identifying Terminals Of B31 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE )

1. Turn the ignition switch off.
2. Disconnect the A4 connector from the clutch switch assembly.
3. Remove the clutch switch assembly (See CLUTCH SWITCH ).
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Switch pin free	10 kΩ or higher
   	Switch pin pushed In	Below 1 Ω

NG : REPLACE CLUTCH SWITCH ASSEMBLY  (See CLUTCH SWITCH )

Fig 2: Inspecting Clutch Switch Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : Go to next step 

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

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   B31-56 (D) - A4-2	Always	Below 1 Ω
   B31-56 (D) - Body ground	Always	10 kΩ or higher

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - CLUTCH SWITCH ASSEMBLY) 

Fig 3: Identifying Terminals Of B31 ECM And A4 Clutch Switch Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - CLUTCH SWITCH ASSEMBLY)