Pinpoint Test 1: No Communication With the 4WD Control Module
TRANSFER CASE ELECTRONIC SHIFT PINPOINT TEST 1: NO COMMUNICATION WITH THE 4WD CONTROL MODULENormal 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:
