DTC 22-01: Engine Speed Signal

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• Troubleshoot any PGM-FI system DTCs first - Refer to: How to Troubleshoot the Fuel and Emissions SystemsHow to Troubleshoot the CVT System(CVT System) .

• 1. EPS system check:

  1. Start the engine.

  2. Check the parameter(s) below with the HDS.

  Signal	Current conditions
  	Values	Unit
  ENGINE SPEED

  Is the engine speed 0-400 min^-1 (rpm)?

  YES 

  Go to step 2.

  NO 

  Intermittent failure, the system is OK at this time. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.

• 2. PCM check:

  1. Disconnect the following connector.

  EPS control unit connector A (11P)

  2. Turn the vehicle to the ON mode.

  3. Measure the voltage between test points 1 and 2.

  Test condition	Vehicle ON mode
  	EPS control unit connector A (11P): disconnected
  Test point 1	EPS control unit connector A (11P) No. 3
  Test point 2	Body ground

  Is there battery voltage?

  YES 

  Go to step 5.

  NO 

  Go to step 3.

• 3. Shorted wire check (NEP line):

  1. Turn the vehicle to the OFF (LOCK) mode.

  2. Jump the SCS line with the HDS, and wait more than 1 minute.

  3. Disconnect the following connector.

  PCM connector A (51P)

  4. Check for continuity between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	EPS control unit connector A (11P): disconnected
  	PCM connector A (51P): disconnected
  Test point 1	EPS control unit connector A (11P) No. 3
  Test point 2	Body ground

  Is there continuity?

  YES 

  Repair a short to body ground in the wire between the EPS control unit and the PCM.

  NO 

  The NEP wire is not shorted. Go to step 4.

• 4. Open wire check (NEP line):

  1. Check for continuity between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	EPS control unit connector A (11P): disconnected
  	PCM connector A (51P): disconnected

  Test point 1	EPS control unit connector A (11P) No. 3
  Test point 2	PCM connector A (51P) No. 26

  Is there continuity?

  YES 

  The NEP wire is OK. Go to step 5.

  NO 

  Repair an open in the wire between the EPS control unit and the PCM.

• 5. EPS control unit check (update):

  1. Reconnect the following connectors.

  EPS control unit connector A (11P)

  PCM connector A (51P) (if disconnected)

  2. Update the EPS control unit if it does not have the latest software.

  3. Start the engine.

  4. Check for DTCs with the HDS.

  DTC Description	DTC	Freeze Frame
  22-01 Engine Speed Signal

  Is DTC 22-01 indicated?

  YES 

  Replace the EPS control unit .

  NO 

  Troubleshooting is complete.