Disconnect the ABS (ESP) control module and PCM connectors and inspect for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Reconnect the connectors.

Connect the GDS and go to ""Current Data"".

Monitor ABS (ESP) control module values in Current Data, check and wiggle the harness(es), connector(s), and terminal(s).

Any change in the values indicates a poor connection. Was a connector problem found?

	▶ Repair the connector. Go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Signal Circuit Inspection" procedure.

IG "OFF". Disconnect PCM connector and ABS(ESP) control module connector.

Measure resistance between vehicle speed input signal terminal of PCM harness connector and chassis ground.

Is the measured resistance within specification?

	▶ Go to "Check open in harness" as follows.
	▶ Repair short to ground in harness. Go to "Verification of Vehicle Repair" procedure.

IG "OFF". Disconnect PCM connector and ABS(ESP) control module connector.

Measure resistance between vehicle speed input signal terminal of PCM harness connector and wheel speed sensor output signal terminal of ABS(ESP) control module harness connector.

Is the measured resistance within specification?

	▶ Go to " Check wheel speed sensor " procedure.
	▶ Repair open in harness. Go to "Verification of Vehicle Repair" procedure.

IG "OFF"

Check open or short in wheel speed sensor (Refer to "C1203 Wheel speed sensor front-RH open/short")

Is the wheel speed sensor normal?

	▶ Substitute with a known - good PCM/ ABS(ESP) control unit and check for proper operation. If the problem is corrected, replace PCM/ ABS(ESP) control unit and go to "Verification of Vehicle Repair" procedure.
	▶ Repair or replace it as necessary, and then go to " Verification of Vehicle Repair" procedure.