Inspection Procedure
WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT STEERING PAD SWITCH LH (AU1, AU2, EAU)
- Removing steering pad switch LH.
- Check continuity between the terminals at each condition, as shown in the chart.
Standard:
TESTER CONNECTION & SPECIFIC CONDITIONTester connection Condition Specified condition AU1 - EAU Do not switch position Approx. 100 kΩ AU1 - EAU SEEK+ switch: push Approx. 1 Ω AU1 - EAU SEEK- switch: push Approx. 0.3 kΩ AU1 - EAU VOL+ switch: push Approx. 1 kΩ AU1 - EAU VOL- switch: push Approx. 3.2 kΩ AU2 - EAU Do not switch position Approx. 100 kΩ AU2 - EAU MODE switch: push Approx. 1 Ω
- NG: REPLACE STEERING PAD SWITCH LH (See REPLACEMENT )
- OK: Go to next step.
- CHECK HARNESS AND CONNECTOR (STEERING PAD SWITCH LH - RADIO RECEIVER ASSY)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the connector from the steering pad switch LH and radio receiver assy.
- Check continuity between the terminals at each condition, as shown in the chart.
Standard:
TESTER CONNECTION & SPECIFIC CONDITIONTester connection Specified condition SW1 - AU1 Continuity SW2 - AU2 Continuity GND - EAU Continuity - Check for a short between the terminals at each condition, as shown in the chart.
Standard:
TESTER CONNECTION & SPECIFIC CONDITIONTester connection Specified condition SW1 - Body ground No continuity SW2 - Body ground No continuity GND - Body ground No continuity
- Check continuity between the terminals at each condition, as shown in the chart.
- NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
- OK: REPLACE RADIO RECEIVER ASSY (See REPLACEMENT )
- Disconnect the connector from the steering pad switch LH and radio receiver assy.