Transmission Control Switch Circuit

U151E AUTOMATIC TRANSAXLE 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 "5" (fifth range).
Shifting up "+" once raises one shift range position, and shifting down "-" 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 shift lock control unit assembly.
(b) Measure the voltage according to the value(s) in the table below.
Standard 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.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT TRANSMISSION FLOOR SHIFT ASSEMBLY

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

NG -- REPLACE TRANSMISSION FLOOR SHIFT ASSEMBLY
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) Turn the ignition switch to the on position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
Standard voltage:

(d) Disconnect the ECM connector.
(e) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.
Standard resistance (Check for short):

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