B - Vehicle Battery

Enter this Pinpoint Test only when directed here from Pinpoint Test C, J or P.

This Pinpoint Test is only intended to diagnose the following:

1. ECA computer processor.
2. Harness circuits: SIG RTN, STO, STI, PWR GND, GROUND, VPWR, KAPWR, VREF, IGNITION.
3. Battery voltage.
4. Power relay.

To prevent replacement of good components, be aware that these non-EEC areas may be faulty:

1. Ignition switch.
2. Battery cables.
3. Alternator.
4. Voltage regulator.
5. Ground straps.

PINPOINT TEST B SCHEMATIC

Pinpoint Test B Schematic:

TEST STEPS B1 - B3

Test Steps B1 - B3:

TEST STEPS B4 - B6

Test Steps B4 - B6:

TEST STEPS B7 - B8

B - Vehicle Battery

Pinpoint Test B Schematic:

Test Steps B1 - B3:

Test Steps B4 - B6:

Test Steps B7 - B8: