| 1 |
ATTEMPT TO CRANK ENGINE
|
Yes |
Go to next step. |
| No |
See STARTING CONCERNS
. |
| 2 |
IDENTIFY TYPE OF NO START
NOTE:
- The purpose of this test step is to identify intermittent No Starts in order to guide the technician to the proper repair procedure.
|
Yes |
Vehicle is an intermittent No Start.
See GENERAL PINPOINT TEST 4: INTERMITTENT . |
| No |
Go to next step. |
| 3 |
CHECK FOR VREF AT THROTTLE POSITION (TP) SENSOR
- Disconnect TP sensor.
- Key ON, Engine OFF (KOEO).
- Measure voltage between VREF circuit (G/V) and SIG RTN circuit (G/W) at the TP sensor connector.
- Key OFF.
- Is voltage between 4.0 and 6.0 volts?
|
Yes |
Reconnect TP sensor.
Go to next step. |
| No |
See GENERAL PINPOINT TEST 1: VEHICLE REFERENCE VOLTAGE . |
| 4 |
CHECK FEPS CIRCUIT FOR SHORT TO POWER
- Key ON, Engine OFF (KOEO).
- Measure voltage between pin 13 (V) at data link connector D-01 and battery negative post.
- Key OFF.
- Is voltage greater than 9.0 volts?
|
Yes |
Repair short to power.
Restore vehicle.
Rerun Quick Test.
See PCM QUICK TEST
. |
| No |
Go to next step. |
| 5 |
CHECK PROFILE IGNITION PICK-UP (PIP) IN THE PCM
NOTE:
- The IDS or equivalent tester must be connected to a reliable power source that is powered with the key in the START position (such as directly to the vehicle battery). Also verify that the vehicle battery is fully charged.
- Access PIP PID.
- While viewing the PIP PID, crank engine.
- Is the PIP PID switching on and off?
|
Yes |
Key OFF.
See GENERAL PINPOINT TEST 13: IGNITION SCOPE PINPOINT TEST to check ignition coils, plugs and wires.
If OK, Go to next step. |
| No |
See GENERAL PINPOINT TEST 8: CRANKSHAFT POSITION (CKP) SENSOR . |
| 6 |
CHECK FUEL PRESSURE
WARNING:
- Before servicing or replacing any components in the fuel system, reduce the possibility of injury or fire following warning, caution, and handling directions found in general test 5 (fuel delivery). See GENERAL PINPOINT TEST 5: FUEL DELIVERY SYSTEM .
- Release fuel pressure. See FUEL PRESSURE RELIEF
.
- Install fuel pressure gauge SST 49 UN01 010.
- IDS or equivalent tester connected.
- Key ON, Engine OFF (KOEO).
- Enter Output Test Mode and run fuel pump to obtain maximum fuel pressure.
- Key OFF.
- Is fuel pressure between 207-448 kPa (30-65 psi)?
|
Yes |
Go to next step. |
| No |
See GENERAL PINPOINT TEST 5: FUEL DELIVERY SYSTEM . |
| 7 |
CHECK FUEL PRESSURE LEAKDOWN
- Install the fuel pressure gauge SST
9 UN01 010.
- IDS or equivalent tester connected.
- Key ON, Engine OFF (KOEO).
- Access Output Test Mode and run fuel pump to obtain maximum fuel pressure.
- Exit Output Test Mode.
- Key OFF.
- Verify fuel pressure remains within 16 kPa (5 psi) of the maximum pressure for one minute after turning off fuel pump.
- Does fuel pressure remain within 16 kPa (5 psi)?
|
Yes |
Restore vehicle.
Go to next step. |
| No |
See GENERAL PINPOINT TEST 5: FUEL DELIVERY SYSTEM . |
| 8 |
CHECK FUEL INJECTORS FOR VPWR
NOTE:
- Check at least two fuel injectors, one on each bank. A no start condition can exist only if greater than 50% of the fuel injectors are without VPWR.
- Disconnect any two fuel injectors.
- Key ON.
- Measure VPWR circuit (BR/W) voltage at fuel injector harness connector.
- Is voltage greater than 10.5 volts?
|
Yes |
Key OFF.
Go to next step. |
| No |
Repair VPWR circuit. |
| 9 |
CHECK FUEL INJECTORS' ABILITY TO DELIVERY FUEL
- Connect Fuel Pressure Gauge SST
9 UN01 010 to schrader valve.
- Locate and disconnect the fuel pump shutoff switch.
- Cycle key several times.
- Monitor SST
hile cranking the engine for at least five seconds.
- Is there a pressure drop greater than 34 kPa (5 psi) while cranking the engine?
|
Yes |
The EEC system is not the cause of the no start.
See SYMPTOM TROUBLESHOOTING CHART - ENGINE DRIVEABILITY
. |
| No |
Replace PCM.
See POWERTRAIN CONTROL MODULE (PCM) REMOVAL / INSTALLATION
. |