Nilfisk-Advance 56507009, Troubleshooting Manual

Page: 53 / 82

FORM NO. 56043129 - SR 1900 - 53
ENGINE SYSTEM
CHECK ENGINE LIGHT TROUBLESHOOTING FOR 1.6L GM ENGINE
The engine ECM will light (turn on) the dash panel (UU) check engine light if there is a problem associated with the computerized engine control
system.
The following steps explain how to correctly access the engine controller’s fault code outputs.
1 On the operator display panel the engine check light (MIL ) comes on steady will not shut off.
2 Locate the 8 way ECM communication test port, which is a part of the engine wiring harness.
3 Next remove the test port protective cap. See Figure 2. Insert a suitable jumper wire across pin “1” (black/green wire) & pin “4” (orange
wire).
Blink Code Function
Although the DST (Diagnostic Service Tool software) is considered a required tool to access the DTC codes, codes may be retrieved without a laptop
computer using the blink code function. To enable this function follow the steps below:
4 Turn the ignition key to the on position.
5 The system will now enter the self diagnostic blink code mode. Be ready with pen and paper to write down any codes that may be stored.
6 The ECM will flash the MIL indicator with a pause between represented numbers that represent DTC codes. The sequence starts with code
1654. Code 1654 confirms the system has entered the blink code mode. The ECM will flash code 1654 (3) times before displaying the actual
DTC code that may be set.
Example:
One short blink (pause) six short blinks (pause)
five short blinks (pause) four short blinks .
• If no DTC codes are found, the ECM will continue to flash 1654 only. This means no stored DTC codes were found.
FIGURE 2
Empty
Pin #1
Pin #4
Jumper across top row at
outside pins ORN & BLK/GRN
Protective Cap
Communication Port