DTC P0500 [YF (2.0L Zetec)]

id0102d0808400

DTC P0500

VSS circuit range/performance

DETECTION CONDITION

• The PCM monitors the vehicle speed from the VSS. If the input vehicle speed signal remains less than threshold under the following conditions, the PCM determines that the VSS circuit has a malfunction.
- Gear is in other than neutral position
- Load is high
- Engine speed is above threshold

POSSIBLE CAUSE

• VSS malfunction
• Connector or terminal malfunction
• Open circuit between PCM terminal 33 and VSS terminal 1
• Open circuit between PCM terminal 58 and VSS terminal 2
• Short to ground between PCM terminal 33 and VSS terminal 1
• Short to ground between PCM terminal 58 and VSS terminal 2
• Short to power between PCM terminal 33 and VSS terminal 1
• Short to power between PCM terminal 58 and VSS terminal 2
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME PID DATA been recorded?
Yes
Go to next step.
No
Record FREEZE FRAME PID DATA on repair order, then go to next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
3
VERIFY CURRENT INPUT SIGNAL STATUS-IS CONCERN INTERMITTENT OR CONSTANT
• Connect WDS or equivalent to DLC-2.
• Start engine.
• Access VSS PID using WDS or equivalent.
• Are PID readings appropriate?
Yes
Go to intermittent concern troubleshooting procedure.
No
Go to next step.
4
INSPECT POOR CONNECTION OF VSS CONNECTOR
• Verify that the VSS connector is connected securely.
• Is connector normal?
Yes
Go to next step.
No
Reconnect the connector, then go to Step 11.
5
INSPECT VSS
• Perform the VSS inspection.
• Is the VSS normal?
Yes
Go to next step.
No
Replace the VSS, then go to Step 11.
6
INSPECT VSS CIRCUIT FOR SHORT TO POWER
• Turn the ignition switch off.
• Disconnect the VSS connector.
• Turn the ignition switch to the ON position (engine off).
• Measure voltage following terminals:
- VSS terminal 1 (wiring harness-side)
- VSS terminal 2 (wiring harness-side)
• Is any voltage reading?
Yes
Repair or replace suspected wiring harness, then go to Step 11.
No
Go to next step.
7
INSPECT VSS CIRCUIT FOR SHORT TO GROUND
• Inspect continuity between following terminal and body ground:
- VSS terminal 1 (wiring harness-side)
- VSS terminal 2 (wiring harness-side)
• Is there continuity?
Yes
Repair or replace suspected wiring harness, then go to Step 11.
No
Go to next step.
8
INSPECT VSS CIRCUITS FOR SHORTS
• Inspect continuity between the VSS connector terminals (wiring harness-side) 1 and 2.
• Is there continuity?
Yes
Repair or replace suspected wiring harness, then go to Step 11.
No
Go to next step.
9
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged, pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair terminal, then go to Step 11.
No
Go to next step.
10
INSPECT VSS CIRCUIT FOR OPEN CIRCUIT
• Inspect continuity between following terminals:
- VSS terminal 1 (wiring harness-side) and PCM terminal 33 (wiring harness-side)
- VSS terminal 2 (wiring harness-side) and PCM terminal 58 (wiring harness-side)
• Is there continuity?
Yes
Inspect VSS pulse wheel for damage. Replace the VSS pulse wheel and go to next step.
No
Repair or replace suspected wiring harness, then go to next step.
11
VERIFY TROUBLESHOOTING OF DTC P0500 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Turn the ignition switch to the ON position (engine off).
• Clear the DTC from the PCM memory using WDS or equivalent.
• Warm up engine.
• Access RPM and LOAD PID using WDS or equivalent.
• Drive the vehicle under the following conditions.
- Engine speed: 2,000 rpm or more
- Gear: Gear is in other than neutral
- Load: 40% or more
• Is PENDING CODE same as DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to next step.
12
VERIFY AFTER REPAIR PROCEDURE
• Perform "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to applicable DTC troubleshooting.
No
Troubleshooting completed.