B3000 SE Regular Cab 4WD V6-3.0L OHV (1998)
Temperature Gauge: Testing and Inspection
1. Disconnect ECT sender C-170. Connect one lead of SST to water temperature indicator sender unit C-170, (R/W) wire, and the other lead to
ground.
2. Set SST to 300 ohms. Key ON. Wait one minute. The engine coolant temperature gauge should indicate C (cold). Key OFF.
3. Set SST to 45 ohms. Key ON. Wait one minute. The engine coolant temperature gauge pointer should be in the one quarter range to mid range.
Key OFF.
4. Set SST to 18 ohms. Key ON. Wait one minute. The engine coolant temperature gauge should indicate H (hot). Key OFF. Return to the
Diagnostic Test.
