Ignition Switch And Key Unlock Warning Switch: Inspection

INSPECT IGNITION SWITCH CONTINUITY

IGNITION SWITCH CONTINUITY CONDITIONS

Switch position	Tester connection	Specified condition
LOCK	-	No continuity
ACC	2 - 3	Continuity
ON	2 - 3 - 4 6 - 7	Continuity
START	1 - 2 - 4 6 - 7 - 8	Continuity

Fig 1: Identifying Ignition Switch Positions And Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the switch.

INSPECT IGNITION SWITCH CIRCUIT

Connect the switch connector and inspect the connector on wire harness side from the back side, as shown.

Fig 2: Identifying Ignition Switch Positions And Connector Terminals (Back Side)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

IGNITION SWITCH TERMINALS VOLTAGE CONDITIONS

Tester connection	Condition	Specified condition
2 - Ground	Always	Battery positive voltage
3 - Ground	Ignition switch ACC or ON	Battery positive voltage
4 - Ground	Ignition switch ON	Battery positive voltage
6 - Ground	Ignition switch ON or START	Battery positive voltage
7 - Ground	Always	Battery positive voltage
8 - Ground	Ignition switch START	Battery positive voltage

If circuit is not as specified, inspect the circuits connected to other parts.

INSPECT IGNITION KEY ILLUMINATION OPERATION
Connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead to terminal 6, and check that the indicator light comes on.

If operation is not as specified, replace the switch.
INSPECT IGNITION KEY ILLUMINATION CIRCUIT (See PROBLEM SYMPTOMS TABLE )

Fig 3: Identifying Ignition Key Illumination Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT KEY UNLOCK WARNING SWITCH CONTINUITY

KEY UNLOCK WARNING SWITCH CONTINUITY CONDITIONS

Switch position	Tester connection	Specified condition
OFF (Key removed)	-	No continuity
ON (Key set)	1 - 2	Continuity

If continuity is not as specified, replace the switch. Connect the switch connector and inspect the connector on the wire harness side from the back side, as shown.

Fig 4: Inspecting Key Unlock Warning Switch Continuity

INSPECT KEY UNLOCK WARNING SWITCH CIRCUIT

Connect the switch connector and inspect the connector on the wire harness side from the back side, as shown.

Fig 5: Identifying Key Unlock Warning Switch Connector Terminals (Wire Harness Side)

KEY UNLOCK WARNING SWITCH CONTINUITY CONDITIONS

Tester connection	Condition	Specified condition
2 - Ground	Always	Continuity

If circuit is not as specified, inspect the circuits connected to other parts.