Diagnostic procedure
KNOCKING/PINGING-ACCELERATION/CRUISE - DIAGNOSTIC PROCEDURE
| STEP |
INSPECTION |
ACTION |
| 1 |
- Connect WDS or equivalent to DLC-2
- Access1 ECT PID.
- Verify ECT PID is less than 116 °C {241 °F}
during driving.
- Is ECT PID less than specification?
|
Yes |
Go to next step. |
| No |
Inspect cooling system for cause of overheating. |
| 2 |
- Connect WDS or equivalent 16 DLC-2.
- Turn ignition key to ON (Engine OFF).
- Retrieve any DTCs.
- Is "PASSED" displayed?
|
Yes |
No DTC is displayed:
|
| No |
DTC is displayed:
- Go to appropriate DTC test.
|
| 3 |
|
Yes |
Go to next step. |
| No |
Inspect for cause. |
| 4 |
- Install fuel pressure gauge-between pulsation damper 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 420-460 kPa {4.3-4.6 kgf/cm2, 61-66 psi} |
Yes |
Go to next step. |
| No |
Zero or low:
- Inspect fuel pump circuit.
- Inspect for open fuel pump relief valve.
- Inspect for fuel leakage inside pressure regulator.
- Inspect for clogged main fuel line.
High:
- Inspect pressure regulator for high pressure cause.
- Inspect for clogged fuel return line.
|
| 5 |
|
Yes |
Inspect ignition timing. |
| No |
Replace knock sensor. |
| 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 or reprogram PCM.
|