Pinpoint tests
| CAUTION | When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00. Failure to follow this instruction may result in damage to the vehicle. |
Note. When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.
Note. Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
Note. If DTCs are recorded and a fault is not present when performing the pinpoint tests, an intermittent concern may be the cause. Always check for loose connections and corroded terminals.
Battery Charging - General Procedures
- Before charging a discharged battery inspect and repair the following conditions, if necessary: Loose accessory drive belt. Pinched or grounded wiring harness to the generator or voltage regulator. Loose wiring harness connections at the generator or voltage regulator. Loose or corroded connections at battery, headlamp panel junction wire or engine ground. Carry out generator charging checks. Excessive battery quiescent drain due to: engine compartment, load space, glove compartment and courtesy lamps remaining on (switch damaged or out of adjustment, glove compartment left open).
Quiescent Current Measurement
- Disconnect the battery ground cable. Refer to «Battery, Mounting and Cables»(ref-311319) .
- Check the vehicle off-load battery voltage. If below 12.5 volts, install a fully charged slave battery for the tests and recharge the vehicle battery.
- Connect a suitable ammeter to the battery with the negative test lead clip to the negative battery terminal, and the positive test lead clip to the battery negative lead.
- Operate the key fob unlock button to disarm the vehicle security system. Switch the ignition to the RUN position for a 10 second duration. Switch the ignition to the OFF position. Remove the key. Close the vehicle doors and luggage compartment lid.
- Monitor the ammeter reading for 30 minutes.
- After 30 minutes the quiescent current reading should be no greater than 30 milliamps.
- Disconnect the ammeter. Reconnect the battery ground cable. Refer to «Battery, Mounting and Cables»(ref-311319) .