AUTOMATIC TRANSMISSION (DIAGNOSTICS)(4AT)(D) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P1817 SPORT MODE SWITCH CIRCUIT

DTC DETECTING CONDITION:

Input signal circuit of SPORT shift switch is open or shorted.

TROUBLE SYMPTOM:

No SPORT mode occurs.

WIRING DIAGRAM:

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1.CHECK SPORT SHIFT SWITCH GROUND CIRCUIT.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from SPORT shift switch.

3) Measure the resistance of harness between SPORT shift switch connector and chassis ground.

Connector & terminal

LHD

(B237) No. 5 — Chassis ground:

RHD

(B237) No. 4 — Chassis ground:

Is the resistance less than 1 Ω?

Repair the open circuit of harness between SPORT shift switch and chassis ground.

2.CHECK SPORT SHIFT SWITCH.

Measure the resistance between SPORT shift switch terminals.

Connector & terminal

(B237) No. 4 — No. 5:

Is the resistance 1 MΩ or more?

Replace the lever plate assembly.

3.CHECK SPORT SHIFT SWITCH.

1) Move the select lever to sport shift mode.

2) Measure the resistance between SPORT shift switch terminals.

Connector & terminal

(B237) No. 4 — No. 5:

Is the resistance less than 1 Ω?

Replace the lever plate assembly.

4.CHECK HARNESS CONNECTOR BETWEEN TCM AND SPORT SHIFT SWITCH.

1) Disconnect the connector from TCM.

2) Measure the resistance of harness between TCM connector and sport shift switch connector.

Connector & terminal

LHD

(B237) No. 4 — (B54) No. 17:

RHD

(B237) No. 5 — (B54) No. 17:

Is the resistance less than 1 Ω?

Repair the open circuit of harness between SPORT shift switch connector and TCM connector, or poor contact in connector.

5.CHECK HARNESS CONNECTOR BETWEEN TCM AND SPORT SHIFT SWITCH.

1) Disconnect the connector from TCM.

2) Measure the resistance of harness between SPORT shift switch connector and chassis ground.

Connector & terminal

LHD

(B237) No. 4 — Chassis ground:

RHD

(B237) No. 5 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the short circuit of harness between SPORT shift switch connector and TCM connector.

6.CHECK INPUT SIGNAL TO TCM.

1) Connect the connectors to TCM and sport shift switch.

2) Turn the ignition switch to ON (engine OFF).

3) Return the select lever to normal mode.

4) Measure the voltage of signal to TCM.

Connector & terminal

(B54) No. 17 (+) — Chassis ground (−):

Is the voltage 9 V or more?

Replace the TCM.

7.CHECK POOR CONTACT.

Is there poor contact in the SPORT shift switch circuit?

Repair the poor contact.

Replace the TCM.