AUTOMATIC TRANSMISSION (DIAGNOSTICS)(4AT)(D) > Diagnostic Procedure without Diagnostic Trouble Code (DTC) > CHECK HOLD SWITCH

AUTOMATIC TRANSMISSION (DIAGNOSTICS)(4AT)(D) > Diagnostic Procedure without Diagnostic Trouble Code (DTC)

CHECK HOLD SWITCH

DIAGNOSIS:

• The LED does not illuminate when hold switch is ON.

• Hold switch circuit is open or shorted.

TROUBLE SYMPTOM:

• The 2nd gear is not held.

• Failure of vehicle to start in 2nd gear except 1st range.

WIRING DIAGRAM:

• LHD model

• RHD model

STEP	CHECK	YES	NO
1.CHECK HOLD SWITCH OPERATION.	When the hold switch is turned to OFF, does the LED illuminate?
2.CHECK HOLD SWITCH OPERATION.	When the hold switch is turned to ON, does the LED illuminate?	Go to CHECK SPORT SHIFT SWITCH.
3.CHECK HOLD INDICATOR LIGHT. 1) Turn the ignition switch to OFF. 2) Remove the combination meter. 3) Check the hold indicator light.	Is the power indicator light OK?		Replace the combination meter assembly.
4.CHECK HOLD SWITCH GROUND CIRCUIT. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from hold switch. 3) Measure the resistance of harness connector between hold switch and chassis ground. Connector & terminal LHD model (R92) No. 4 — Chassis ground: RHD model (B133) No. 4 — Chassis ground:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between hold switch and chassis ground.
5.CHECK HOLD SWITCH. 1) Turn the hold switch to ON. 2) Measure the resistance between hold switch terminals. Terminal No. 4 — No. 3:	Is the resistance less than 1 Ω?		Replace the hold switch.
6.CHECK HOLD SWITCH. 1) Turn the hold switch to OFF. 2) Measure the resistance between hold switch terminals. Terminal No. 4 — No. 3:	Is the resistance 1 MΩ or more?		Replace the hold switch.
7.CHECK HARNESS CONNECTOR BETWEEN TCM AND HOLD SWITCH. 1) Disconnect the connectors from TCM and combination meter. 2) Measure the resistance of harness connector between TCM and hold switch. Connector & terminal LHD model (B55) No. 9 — (R92) No. 3: RHD model (B55) No. 9 — (B133) No. 3:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between TCM and hold switch connector, and poor contact of connector.
8.CHECK HARNESS CONNECTOR BETWEEN TCM AND COMBINATION METER. Measure the resistance of harness between TCM and combination meter. Connector & terminal (B55) No. 22 — (i10) No. 14:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between TCM and combination meter, and the poor contact of the connector.
9.CHECK HARNESS CONNECTOR BETWEEN TCM AND HOLD SWITCH. Measure the resistance of harness connector between TCM and chassis ground to make sure that circuit does not short. Connector & terminal (B55) No. 9 — Chassis ground:	Is the resistance 1 MΩ or more?		Repair the short circuit of harness between TCM and hold switch connector.
10.CHECK INPUT SIGNAL FOR TCM. 1) Connect the connector to TCM and hold switch. 2) Turn the ignition switch to ON (engine OFF). 3) Measure the signal voltage for TCM while the hold switch is OFF. Connector & terminal (B55) No. 9 (+) — Chassis ground (−):	Is the voltage 6 V or more?		Replace the TCM.
11.CHECK INPUT SIGNAL FOR TCM. Check the signal voltage for TCM while the hold switch is ON. Connector & terminal (B55) No. 9 (+) — Chassis ground (−):	Is the voltage less than 1.5 V?		Replace the TCM.
12.CHECK POOR CONTACT.	Is there poor contact in the hold switch circuit?	Repair the poor contact.	A temporary poor contact of the hold switch circuit connector or harness may be the cause.