Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
NO.13 KNOCKING/PINGING [BP, BP WITH TC] DIAGNOSTIC PROCEDURE
| STEP |
INSPECTION |
ACTION |
| 1 |
- Connect WDS or equivalent to DLC-2.
- Access ECT PID.
- Verify ECT PID is less than 116°C {240°F}
during driving.
- Is ECT PID less than specification?
|
Yes |
Go to the next step. |
| No |
Inspect cooling system for cause of overheating. |
| 2 |
- Connect WDS or equivalent to DLC-2.
- Turn ignition switch to ON.
- Retrieve any DTC.
- Is "PASSED" displayed?
|
Yes |
No DTC displayed:
|
| No |
DTC displayed:
- Go to appropriate DTC test.
|
| 3 |
- Is engine compression correct?
|
Yes |
Go to the next step. |
| No |
Inspect for cause. |
| 4 |
- Install fuel pressure gauge between fuel filter and fuel distributor.
- Start engine and run it at idle.
- Measure fuel line pressure at idle.
- Is fuel line pressure correct at idle?
Fuel line pressure 370-420 kPa {3.7-4.3 kgf/cm2, 53-61 psi} |
Yes |
Go to the next step. |
| No |
Zero or low:
- Inspect FP circuit
- Inspect for open FP relief valve
- Inspect for fuel leakage inside pressure regulator
- Inspect for clogged main fuel line
- Inspect pulsation damper
High:
- Inspect pressure regulator for high pressure cause
- Inspect for clogged fuel return line
|
| 5 |
|
Yes |
Inspect ignition timing. |
| No |
Replace KS. |
| 6 |
- Verify test results.
- If okay, return to diagnostic index to service any additional symptoms.
- If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
- If vehicle is repaired, troubleshooting completed.
- If vehicle is not repaired or additional diagnostic information is not available, replace PCM.
|