Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK COMBINATION METER ASSY
1. Check voltage.
  1. Remove the combination meter assy with connectors still connected.
  2. Measure voltage between terminals C7-22 and C7-28 of combination meter assy.
    Standard voltage: 5 V
  3. Measure voltage between terminals C7-8 and C7-22 of combination meter assy.
Standard voltage:

Fig 2: Combination Meter Assy Voltage Specification Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT: As the fuel level is moved from F side to E side, the voltage decreases gradually without interruption.

OK: CHECK AND REPLACE COMBINATION METER ASSY

NG: Go to next step.
INSPECT FUEL SENDER GAGE ASSY
1. Check fuel sender gauge voltage.
  1. Remove the fuel sender gauge assy.
  2. Connect the positive (+) lead from the three 1.5 V dry cell batteries to terminal 2 (FV) and negative (-) lead to terminal 1 (FE).
  3. Measure voltage between terminals 1 (FE) and 3 (FR) of fuel sender gauge assy for each float position, as shown in the chart.
Standard voltage:

Fig 4: Fuel Sender Gage Assy Voltage Specification Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Measuring Float Positioning
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FUEL SENDER GAGE ASSY

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR