Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
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DTC P0615 ECU starting motor control wire is open or drive module is overheated.
P0616
ECU starting motor control wire is short to ground.
P0617 ECU starting motor control wire is short to high level.
Fault Description: ECU provides starting motor with grounding via so-called “drive” internal solid component in
order to control starting motor operation. Under starting motor control circuit command, when fault diagnostic
apparatus is connected, it is indicated that starting motor circuit is grounded via control module in order to provide
starting motor with voltage; when fault diagnostic apparatus is disconnected, it is indicated that starting motor circuit
is not connected via control module command currently. ECU monitors starting motor circuit for conditions as
follows:
It is short to ground.
It is short to voltage.
It is open.
When ECU detects incorrect voltage signals, DTC occurs and corresponding drive will stop operating.
Diagnosis Hint: Check harness for intermittency and good contact.
Prior to component maintenance, remove all fragments from connector surface. Check connector pads for correct
installation to prevent contamination from entering prior to diagnosis and component replacement.
z Poor terminal connection—Check harness connectors for looseness, mismatching, retainer damage, improper
shape or damage and connection failure with wires. Apply corresponding matching terminals for test of proper
tension.
z Harness damage—Check wire harness for damage. In the case of no harness faults, move relevant connectors and
wire harness and observe display of fault diagnostic apparatus. Fault diagnostic apparatus displays changes to
indicate fault positions.
z Check ECU and engine ground connection for reliability and cleanness. If it is determined that DTC is an
intermittent fault, please refer to Fault Record to check the time of last DTC occurrence.
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