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Home >> Mazda >> 2008 >> B4000 V6-4.0L >> Repair and Diagnosis >> Transmission and Drivetrain >> Transfer Case >> Testing and Inspection >> Pinpoint Tests >> Pinpoint Test 1: No Communication With the 4WD Control Module
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Pinpoint Test 1: No Communication With the 4WD Control Module

TRANSFER CASE ELECTRONIC SHIFT PINPOINT TEST 1: NO COMMUNICATION WITH THE 4WD CONTROL MODULE

Normal Operation
In order for the 4WD control module to communicate with the scan tool, the operating voltage required to supply the 4WD control module is in the range between 9 and 16 volts. Hot-at-all times voltage is supplied by circuit (G/R); ground is supplied by circuit (B/W).

Possible Causes
- Power supply circuit (G/R)
- Smart junction box (SJB) fuse 28 (15A)
- Ground circuit (B/W)
- Charging system
- Battery

Caution:
- Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

Step 1-Step 6:




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