Tire Pressure Warning Light Circuit: Procedure

1. Disconnect the E74 ECU connector.
   Fig 1: Checking Harness And Connector (Combination Meter - ECU And Body Ground)

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2. Disconnect the E13 meter connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   E74-5 (IND) - E13-32 (TIRE)	Always	Below 1 Ω
   E74-5 (IND) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the E74 ECU connector.
   Fig 2: Identifying E74 ECU Connector

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2. Turn the ignition switch to ON, and check if the tire pressure warning light illuminates.

   Result

   Result	Proceed to
   Illuminates	A
   Does not illuminate	B

B → See step   3 

A → See step   4