Komatsu 830E-AC Shop Manual page 454

To check the Engine Crank Signal:
NOTE: Before checking ENGCRANK, verify that the
21B wires are removed from the starter solenoid relay
in the battery control box. Also, make sure that the
engine oil is at the proper level.
1. Change the PTU from the "Engine Stopped
Tasks" screen to the "TCI Real Time Data"
screen.
2. Turn the key switch to START.
Trucks without prelube system:
Measure 24VDC to ground on circuit 21A @
TB25 and circuit 21B @ TB31.
Trucks with prelube system:
Measure 24VDC to ground on circuit 21A @
TB25.
After the prelube system has reached the proper
oil pressure, measure 24VDC to ground on
circuit 21PT @ TB28 to ground.
After circuit 21PT is 24VDC, circuits 21ST and
21B will measure 24VDC to the starter solenoid.
Verify that ENGSTRTREQ, ENGCRANK,
ENGCRNK2, and BATSEPC are highlighted on
the PTU when circuits 21A, 21PT and 21B are
24VDC.
3. Turn the key switch to ON.
4. Move the directional control lever to FORWARD.
5. Turn the key switch to START.
Circuit 21A should remain 0VDC.
6. Release the key switch.
7. Move the directional control lever to NEUTRAL.
8. Turn key switch to START position.
Circuit 21A should remain 0VDC.
10. Release the key switch.
11. Move the directional control lever to PARK.
E3-24 AC Drive System Electrical Checkout Procedure
(Version 21 Software)
FIGURE 3-11. STATUS/WARNING LIGHTS
Row/Column Indicator Description
A1* High Hydraulic Oil Temperature
B1* Low Steering Pressure
C1 Low Accumulator Precharge
D1 Spare
E1 Low Brake Pressure
A2* Low Hydraulic Tank Oil Level
B2* Low Auto Lube Pressure
C2* Circuit Breaker Tripped
D2* Hydraulic Oil Filter Restricted
E2* Low Fuel
A3* Parking Brake Applied
B3* Service Brake Applied
C3* Body Up
D3* Dynamic Retarding Applied
E3 Stop Engine
A4* Starter Failure
B4* Manual Backup Lights
C4* 5 Minute Shutdown Timer
D4* Retard Speed Control
E4* Cheack Engine
A5 No Propel/Retard
B5 Propulsion System Warning
C5 Propulsion System Temperature
D5 Manitenance Monitor
E5 Battery Charger System Failure
A6 No Propel
B6 Propulsion System at Rest
C6* Propulsion System Not Ready
D6* Propulsion System at Reduced Level
E6* Retard System at Continuous Level
Color
Red
Red
Red
Red
Red
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Red
Amber
Amber
Amber
Amber
Amber
Red
Amber
Amber
Red
Red
Red
Amber
Amber
Amber
Amber
10/06 E03018