QB3 - Check Keep Alive Power (KAPWR) to PCM

- Key Off.

- Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Measure voltage between Test Pin 55 (KAPWR) and Test Pin 51 or 103 (PWR GND) at the breakout box.

- While observing DVOM, grasp the EEC-V harness and wiggle, shake or bend a small section while working from the PCM to the dash panel.

- Does the DVOM indicate less than 10.5 volts?

YES -- ISOLATE and SERVICE open in KAPWR circuit. REMOVE breakout box. RECONNECT the PCM. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- No open in KAPWR harness circuit detected. REMOVE the breakout box. RECONNECT the PCM. GO to QB4. QB4 - Check For Repeat of DTC 1605