Inspection Procedure

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

CHECK CLOCK ASSY (IG, TAU)

Check signal waveform (TAU signal).

Connect the oscilloscope to the terminals 1 (GND) and 7 (TAU) of clock assy connector.
Start engine.
Check the signal waveform.

WAVEFORM REFERENCE

Item	Contents
Tool setting	10 V/DIV, 100 ms/DV
Vehicle condition	Engine idle speed

Fig 1: Identifying Clock Assy (IG, ATU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Injector Signal & Magnification Waveform

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check voltage (IG signal).

Turn the ignition switch to ON.
Measure the voltage between terminal 20 (IG) of clock assy and body ground.

Standard voltage: 10 - 14 V

Result:

RESULT

A	TAU signal: NG
B	IG signal: NG
C	OK

Fig 3: Identifying Clock Assy Connector Terminal IG

A: GO TO FUEL SYSTEM
B: Go to step 2
C: CHECK AND REPLACE CLOCK ASSY

INSPECT FUSE (GAUGE 1)
1. Check that continuity exists of GAUGE 1 fuse.
1. NG: REPLACE FUSE
2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR