ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P2135 THROTTLE/PEDAL POSITION SENSOR/SWITCH “A”/“B” VOLTAGE CORRELATION

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

• Improper idling

• Poor driving performance

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode , and Inspection Mode .

WIRING DIAGRAM:

• Euro 4 model

• Euro 5 model

STEP	CHECK	YES	NO
1.CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR. 1) Turn the ignition switch to OFF. 2) Disconnect the connectors from ECM and electronic throttle control. 3) Measure the resistance between ECM and chassis ground. Connector & terminal Euro 4 model (B137) No. 25 — Chassis ground: (B137) No. 23 — Chassis ground: (B137) No. 23 — (B136) No. 22: (B137) No. 24 — Chassis ground: (B137) No. 24 — (B136) No. 22: Euro 5 model (B134) No. 28 — Chassis ground: (B134) No. 18 — Chassis ground: (B134) No. 18 — (B137) No. 27: (B134) No. 19 — Chassis ground: (B134) No. 19 — (B137) No. 27:	Is the resistance 1 MΩ or more?		Repair the short circuit to ground in harness between ECM and electronic throttle control connector.
2.CHECK SHORT CIRCUIT INSIDE THE ECM. 1) Connect the connector to ECM. 2) Measure the resistance between electronic throttle control connector and engine ground. Connector & terminal (E57) No. 5 — Engine ground: (E57) No. 4 — Engine ground:	Is the resistance 1 MΩ or more?		Repair the short circuit to ground in harness between ECM and electronic throttle control connector. Replace the ECM if defective.
3.CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR. 1) Disconnect the connectors from ECM. 2) Measure the resistance of harness between ECM and electronic throttle control connector. Connector & terminal Euro 4 model (B137) No. 23 — (E57) No. 5: (B137) No. 24 — (E57) No. 4: (B137) No. 31 — (E57) No. 3: Euro 5 model (B134) No. 19 — (E57) No. 5: (B134) No. 18 — (E57) No. 4: (B134) No. 29 — (E57) No. 3:	Is the resistance less than 1 Ω?		Repair the harness and connector. NOTE: In this case, repair the following item: • Open circuit in harness between ECM and electronic throttle control connector • Poor contact of coupling connector • Poor contact of joint connector
4.CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR. 1) Connect the connector to ECM. 2) Measure the resistance between electronic throttle control connector and engine ground. Connector & terminal (E57) No. 3 — Engine ground:	Is the resistance less than 5 Ω?		Repair the harness and connector. NOTE: In this case, repair the following item: • Open circuit of harness between ECM and engine ground • Poor contact of ECM connector • Poor contact of joint connector • Poor contact of coupling connector
5.CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR. 1) Turn the ignition switch to ON. 2) Measure the voltage between electronic throttle control connector and engine ground. Connector & terminal (E57) No. 5 (+) — Engine ground (−): (E57) No. 4 (+) — Engine ground (−):	Is the voltage 5 V or more?	Repair the short circuit to power in harness between ECM and electronic throttle control connector.
6.CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR. 1) Turn the ignition switch to OFF. 2) Disconnect the connectors from ECM. 3) Measure the resistance between ECM connectors. Connector & terminal Euro 4 model (B137) No. 25 — (B137) No. 23: (B137) No. 25 — (B137) No. 24: Euro 5 model (B134) No. 28 — (B134) No. 19: (B134) No. 28 — (B134) No. 18:	Is the resistance 1 MΩ or more?	Repair the poor contact of electronic throttle control connector. Replace the electronic throttle control if defective.	Repair the short circuit to power in harness between ECM and electronic throttle control connector.