Transmission Control Switch Circuit

A760H AUTOMATIC TRANSMISSION: ELECTRONIC CONTROLLED AUTOMATIC TRANSMISSION SYSTEM: Transmission Control Switch Circuit

Transmission Control Switch Circuit

DESCRIPTION

When moving the shift lever into the S position using the transmission control switch, it is possible to switch the shift range position between "1" (first range) and "6" (sixth range).
Shifting to "+" once raises one shift range position, and shifting to "-" lowers one shift range position.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (BATTERY - TRANSMISSION CONTROL SWITCH)

(a) Disconnect the transmission control switch connector of the shift lock control unit assembly.
(b) Measure the voltage according to the value(s) in the table below.
Voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.
Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT TRANSMISSION CONTROL SWITCH

(a) Measure resistance between each terminal of shift lock control unit assembly when the shift lever is moved to each position.
Resistance:

NG -- REPLACE TRANSMISSION CONTROL SWITCH
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

(a) Connect the transmission control switch connector of shift lock control unit assembly.
(b) Disconnect the ECM connector.
(c) Turn the engine switch on (IG), and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
Voltage:

(d) Turn the engine switch off.
(e) Disconnect the ECM connector.
(f) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.
Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE