Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT LIGHT CONTROL RHEOSTAT

Disconnect the R4 light control rheostat connector.

Check the voltage and resistance.

Standard

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
4 (T) - Body ground	Ignition switch ON, Taillight switch OFF	Below 1 V
4 (T) - Body ground	Ignition switch ON, Taillight switch ON	10 to 14 V
1 (IG) - Body ground	Ignition switch ON	10 to 14 V
1 (IG) - Body ground	Ignition switch OFF	Below 1 V
3 (-) - Body ground	Always	Below 1

Reconnect the light control rheostat connector.

NG: REPLACE LIGHT CONTROL RHEOSTAT

Fig 1: Identifying Light Control Rheostat Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

INSPECT COMBINATION METER ASSEMBLY

Disconnect the C9 combination meter connector.

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
C9-20 - C9-40	Ignition switch ON	10 to 14 V

Reconnect the combination meter connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Disconnecting C9 Combination Meter Connector

OK: REPLACE COMBINATION METER ASSEMBLY