Checking 15L Supply to Control Module [GB3]

Checking 15I Supply To Control Module





- Ignition off.
- Connect test box and check ground points as per JA. Connecting Test Box [JA]
- Connect control module.
- Engine idling.

Connect a voltmeter between #1 and #53 on test box.

Voltmeter should read approx. battery voltage.

If reading is OK:
- Check combination relay GB4. Checking Combination Relay [GB4]

If reading is incorrect:
- Check fuse 11/29 and lead between battery and control module #53 for open circuit as per HA2 and contact resistance and oxidation as per HA6. Checking Leads and Connections [HA]