Checking Resistance to Ground on Power Supply to ECM [EM9]

Checking Resistance To Ground On Power Supply To Control Module





- Ignition off.
- Disconnect control module.
- Disconnect combination relay 15-pin connector.

Connect an ohmmeter between #1 and #3 on test box.

Ohmmeter should read infinite resistance.

If reading is OK:
- Check 30 supply to combination relay EM10. Checking 30-Supply to Combination Relay [EM10]

If reading is incorrect:
- Check lead between combination relay 15-pin connector terminal 10 and control module #33 for open circuit as per HA2. Open Circuit [HA2]