DTC Troubleshooting: 22-01
DTC 22-01:
 Engine Speed Signal (Initial Diagnosis)
NOTE: If the MIL indicator is on, troubleshoot the fuel and emission systems first.
  1. Start the engine.
  1. Check the ENGINE SPEED in the EPS DATA LIST with the HDS.
Is there 0 rpm (min −1 ) at idle?
YES -
Go to Step 3 .
NO -
Intermittent failure, the system is OK at this time.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the EPS control unit connector D (28P).
  1. Start the engine.
  1. Measure the voltage between EPS control unit connector D (28P) terminal No. 3 and body ground.
Is there any voltage?
YES -
Check for loose terminals in the EPS control unit connectors, and repair if necessary. If no poor connections are found, replace the EPS control unit. ■
NO -
Go to Step 7 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the EPS control unit connector D (28P).
  1. Check for continuity between EPS control unit connector D (28P) terminal No. 3 and body ground.
Is there continuity?
YES -
Repair short to body ground in the wire between the EPS control unit and the ECM/PCM.■
NO -
Go to Step 10 .
  1. Short the SCS line with the HDS.
  1. Disconnect the ECM/PCM connector A (44P) or ECM/PCM connector A (49P).
  1. Check for continuity between EPS control unit connector D (28P) terminal No. 3 and ECM/PCM connector A (44P) terminal No. 28 *1 or ECM/PCM connector A (49P) terminal No. 29 *2 .
    *1: R20A3 engine model
    *2: K24Z3 engine model
Is there continuity?
YES -
NO -
Repair open in the wire between the EPS control unit and the ECM/PCM.■
R20A3 engine model
K24Z3 engine model