7-13
4. STARTING CIRCUIT
4. STARTING CIRCUIT
OPERATING FLOW
OPERATING FLOW
B) terminal Fusible link [CN-351 (40A)] Master switch [CS-74 (1)
→
(2)]
I/conn [CN-01 (16, 17)] Fuse box [CN-36] Start switch [CS-02 (1)]
ECM power relay [CR-30 (30)]
Power relay [CR-35 (30)]
The gear selector lever is neutral position. It is necessary condition before the starting.
The gear selector has an output signal which is activated whenever the shift lever is in the neutral
position. This signal can be used to control a relay and prevent engine from starting whenever the shift
lever is not in the neutral position.
When start key switch is in ON position
Start switch ON [CS-02 (2, 3)] I/conn [CN-01(2)] Master switch [CS-75 (1)
→
(2)]
When start key switch is in START position
Start switch START [CS-2 (6)] Start safety relay [CR-05 (30)
→
(87)] I/conn [CN-04 (20)]
I/conn[CN-13(7)] Start relay [CR-23] Starter (terminal B
+
and M connector of start motor)
CHECK POINT
CHECK POINT
1)
1)
※
2)
2)
(1)
(2)
※
GND : Ground
※
ECM : Electronic control module
※
MCU : Machine control unit
※
TCU : Transmission control unit
Battery relay [CR-1]
ECM power relay [CR-30 (30)
→
(87)]
Fuse box [CN-37 (19)]
I/conn [CN-04 (31)] ECM [CN-J2 (5)]
Fuse box [CN-37 (13)] MCU [CN-58A (A03)]
Power relay [CR-35 (30)
→
(87)] Fuse box [CN-37 (15)]
TCU [CN-157 (45)]
Engine
Key switch
Check point
Voltage
Running
ON
①
- GND (battery B+)
②
- GND (fusible link)
③
- GND (start key B terminal)
④
- GND (start key BR terminal)
⑤
- GND (i/conn CN-01 (16))
⑥
- GND (start key C terminal)
⑦
- GND (start safety relay output)
⑧
- GND (start key ACC terminal)
20~25 V
Battery relay operating (All power is supplied with the electric component)
Summary of Contents for HL955
Page 557: ...7 6 MEMORANDUM MEMORANDUM ...
