Fault Code | Possible cause | Action |
P1552 | Fan relay open circuit, or short circuit to ground | View & note diagnostic software 'sensor' data. Ensure fan relay connector is secure. Disconnect ECM and proceed to pinpoint test 1: |
P1553 | Short circuit to battery+ | Disconnect fan relay and proceed to pinpoint test 4: |
Pinpoint Tests
Test | Result | Action |
1. Check cable and terminal integrity: ECM pin B30 | OK | Disconnect fan relay and proceed to test 2 |
Faulty | Rectify fault, proceed to test 5 | |
2. Check cable for short circuit: ECM pin B30 to ground | OK | Proceed to test 3 |
Short circuit | Locate and rectify wiring fault, proceed to test 5 | |
3. Check cable continuity: Fan relay pin 2 to ECM pin B30 Fan relay pin 1 to EMS main relay pin 5 | OK | Proceed to test 4 |
Open circuit | Locate and rectify wiring fault, proceed to test 5 | |
4. Check cable for short circuit: ECM pin B30 to ECM pin A06 | OK | Proceed to test 5 |
Short circuit | Locate and rectify wiring fault, proceed to test 5 | |
5. Reconnect harness, clear fault code and run diagnostic software function test to visually verify operation of cooling fan | OK | Action complete - quit test |
Fault still present | Contact Triumph service |