Without Coolant Control Valve
DTC P025B:00 DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P025B:00 |
Fuel pump control module circuit range/performance problem |
| DETECTION CONDITION |
- When any of the following conditions is met:
- PCM detects overheating in fuel pump control module.
- Output duty ratio signal received from PCM is in error.
- Temperature detection thermistor in fuel pump control module is malfunctioning.
- Output signal from fuel pump control module is erratic (noise overlap).
Diagnostic support note
- This is a continuous monitor (CCM).
- The check engine light does not illuminate.
- FREEZE FRAME DATA is not available.
- Snapshot data is available.
- DTC is stored in the PCM memory.
|
| FAIL-SAFE FUNCTION |
- Stops fuel pump control. (If overheating is detected in fuel pump control module)
|
| POSSIBLE CAUSE |
- Fuel pump control module connector or terminals malfunction
- PCM connector or terminals malfunction
- Short to ground in wiring harness between fuel pump control module terminal 1B and PCM terminal 2AE
- Short to power supply in wiring harness between fuel pump control module terminal 1B and PCM terminal 2AE
- Open circuit in wiring harness between fuel pump control module terminal 1B and PCM terminal 2AE
- Fuel pump control module malfunction
- PCM malfunction
|
 Courtesy of MAZDA MOTORS CORP.
|