Internal Control Module Monitoring Processor Performance (P060A)
MONITOR DESCRIPTION
The main CPU and sub CPU of the ECM perform data communication between each other.
The main CPU monitors the communications and WDC pulses from the sub CPU. When the
signal malfunctions below are detected, the DTC is output.
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Relay
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. FAN NO. 1 RELAY
(a) Remove the relay from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table b ...
Random Access Memory (RAM) (P0604)
MONITOR DESCRIPTION
The ECM continuously monitors its internal memory status. This self-check ensures
that the ECM is functioning properly. It is diagnosed by internal "mirroring" of
the main CPU and sub CPU to detect Random Access Memory (RAM) ...