Blink Code Method for Retrieving Diagnostic Trouble Codes (Early VP44 Pump Engines Only)

RG11754A-UN-13JUL01

Diagnostic Blink Code Connector

A - Diagnostic Blink Code Connector

B - Diagnostic Connector

C - ECU

On OEM applications that have a Fault Lamp, the ECU has the ability to display Diagnostic Trouble Codes (DTCs) using blinking sequence of the fault lamp. To retrieve DTCs from the ECU using the “blink code” method:

NOTE: The ECU blinks the codes in 2-digit codes only. See LISTING OF DIAGNOSTIC TROUBLE CODES (DTCS) later in this Group.

1. Locate and uncap the 4–way METRI-PACK™ diagnostic blink code connector (A).

2. Using a short piece of wire, jump terminals A and B in the diagnostic blink code connector together.

3. Turn the ignition switch “ON”.

4. The Fault Lamp will begin to flash a code number. For example, flash three times...short pause...flash two times...long pause. This example is code 32.

5. The ECU begins the flashing sequence by flashing a code 32, this indicates the start of blinking active codes. If there are any active DTCs, the ECU will flash it's 2–digit number. If there is more than one active DTC, the ECU will flash each code in numerical order. If there are no active DTCs, the Fault Lamp will flash a code 88.

6. Following the active codes, the Fault Lamp will flash a code 33, this indicates the start of blinking stored codes. If there are any stored DTCs, the Fault Lamp will flash its 2–digit number. If there is more than one stored DTC, the ECU will flash each code in numerical order. If there are no stored DTCs, the Fault Lamp will flash a code 88.

7. Once complete, this sequence will repeat.

8. When complete, turn ignition “OFF”, remove jumper wire, and recap the diagnostic reader connector.

As an example, if an engine had an active DTC 18 and stored DTC 53, the flashing sequence would be: flash three times...short pause...flash two times...long pause...flash one time...short pause...flash eight times...long pause...flash three times...short pause...flash three times...long pause...flash five times...short pause...flash three times.