HOOD AS-ENGINE 1218986 - Caterpillar

Electrical shock hazard. The injector for the common rail fuel system uses 90-120 volts.
Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.
This procedure covers the following diagnostic trouble codes.
Table 1
Diagnostic Trouble Codes
Code Description Conditions Present Response
651-3 Open circuit of harness/coil in first cylinder injector Engine is running.
Battery voltage is normal.
Occurs during injection
CPU is normal Open circuit occurs eight times or more.
Engine derate
EGR stops.
Intake throttle is open 100 percent
Warning Level 3
Other injectors continue to operate, which will cause increase vibration.
652-3 Open circuit of harness/coil in second cylinder injector
653-3 Open circuit of harness/coil in third cylinder injector
654-3 Open circuit of harness/coil in fourth cylinder injector
523523-3 No.1 & 4 cylinder injector short to +B or GND Engine is operating
Battery voltage is normal
Wiring harness short to +B or Wiring harness short to ground 3 times or more. Injectors that have DTC will stop injection
Engine is derated
EGR stop
Intake throttle fully open
Warning Level 3
523524-3 No. 2 & 3 cylinder injector short to +B or GND
523535-0 Injector Charge Voltage: High Battery voltage is normal
CPU is normal Engine derated
EGR stop
Intake throttle fully open
Engine stopped 60 seconds later.
523605-6 Internal Injector Drive Circuit Short Battery voltage is normal. Injectors which have error stop injection.
Engine derates 25%
EGR stops
Intake throttle full open
Engine Vibration increases.
Engine stops in some case.
Illustration 1 g06110895For 523535-0 Injector Charge Voltage: High, skip to the next troubleshooting table.
Table 2
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Check that the wires going to the connector are not pulled.
B. Check that the connector pins and sockets are not damaged and aligned correctly.
C. Check the harness for corrosion, abrasion, and pinch points from the injector to the engine ECM connector. Check that the engine ECM