Reset Procedure

If an HFM-SFI control module is the suspect problem or defective, it should be replaced with a known good or new unit. After replacement, the control module's "self-adaptive" feature must be reset to erase any "learned" values.

SPECIAL TOOLS
The following special tools are required to perform the reset procedure:

Impulse Counter Scan Tool:

a. Impulse counter scan tool# 124 589 19 21 00 (or equivalent).

Impulse Counter Adapter:

b. Impulse counter adapter# 140 589 14 63 00 (or equivalent).

TEST CONDITIONS
a. Coolant temperature approx. 80° C (160° F).
b. A/C OFF.
c. Gear selector in "P" position.

Test Equipment Hook-up:

TEST EQUIPMENT HOOK-UP
Connect the Impulse counter (013) and adapter (075) according to connection diagram. LED "U-Batt" must light up.

EXTRACTING CODES
1. Turn ignition "ON".
2. Press start button for 2 - 4 seconds.
3. Read and record fault code (DTC).
4. Press start button again for 2 - 4 seconds.
5. Read and record fault code (DTC).
6. Repeat steps 4 and 5 until the first fault code reappears.

CLEARING FAULT CODE AND SELF-ADOPTION MEMORY
1. Press start button for 2 - 4 seconds.
2. Read fault code.
3. Press start button for 6 - 8 seconds, thereby clearing the previously displayed fault code.
4. Repeat steps 1 - 3 until fault code "1" appears (no faults stored).
5. After fault code "1" appears on the display, press start button for 6 - 8 seconds.