No Response From Low Tire Pressure Warning Module

Tests 1 - 3:

Tests 4 - 8:

Tests 9 - 12:

Test 13:

SYMPTOM
NO RESPONSE FROM THE LOW TIRE PRESSURE WARNING MODULE

POSSIBLE CAUSES
- Fused ignition switch output circuit intermittently short to ground
- Fused ignition switch output circuit shorted to ground
- SCI transmit/ISO 9141K circuit open
- Fused ignition switch output circuit open
- Ground circuit open
- SCI transmit/ISO 9141K circuit short to ground
- LTPW MODULE - fused ignition switch output shorted to ground
- LTPW MODULE - no response
- SCI transmit/ISO 9141K circuit short to voltage