1. Radio Description
HINT: In addition to static, other problems such as "phasing", "multipath", and "fade out" exist. These problems are not caused by electrical noise, but by the radio signal propagation method itself.
Radio Frequency |
Noise Occurrence Condition |
Presumable Cause |
AM | Noise occurs in a specified area | Foreign noise |
AM | Noise occurs when listening to an intermittent broadcast | An identical program transmitted from multiple towers can cause noise where the signals overlap |
AM | Noise occurs only at night | Music beat from a distant broadcast |
FM | Noise occurs while driving in a specified area | Multipath or phasing noise resulting from a change in FM frequency |
HINT: If the noise does not match the examples above, refer to the descriptions about phasing and multipath.
Vehicle Speed Signal Circuit between Radio and Navigation Assembly
and Combination Meter
DESCRIPTION
The radio and navigation assembly receives a vehicle speed signal from the
combination meter and
information about the GPS antenna, and then adjusts vehicle position.
HINT:
A voltage of 12 V or 5 V is output from each ECU and then input to
the combination meter. The sig ...
Radio Broadcast cannot be Received or Poor Reception
INSPECTION PROCEDURE
1 CHECK RADIO AND NAVIGATION ASSEMBLY
Check the radio's automatic station search function.
Check the radio's automatic station search function
by activating it.
OK:
The radio's automatic station search function
works properly.
2 INSPECT RADIO AND NAVIGATION AS ...
On-vehicle inspection
1. INSPECT MASS AIR FLOW METE
NOTICE:
Perform the mass air flow (MAF) meter inspection
by following the procedures below.
Only replace the MAF meter when the MAF value
in the DATA LIST (with the engine stopped) are
not within the normal operating range or there is
fore ...