DTC P0703 - Torque Converter/Brake Switch "B" Circuit -
WARNING: This page is about a different variant/trim than selected.
- DTC DETECTING CONDITION:
- Two consecutive driving cycles with malfunction
CAUTION: After repair or replacement of malfunctioning parts, conduct Clear Memory Mode < Ref. to OPERATION , CLEAR MEMORY MODE > and INSPECTION MODE < Ref. to OPERATION , INSPECTION MODE. > - WIRING DIAGRAM:
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK OPERATION OF BRAKE LIGHT. | Does brake light come on when depressing the brake pedal? | Go to step 2. | Repair or replace brake light circuit. |
2 CHECK HARNESS BETWEEN TCM AND BRAKE LIGHT SWITCH CONNECTOR.
|
Is the measured value less than 1 Ω? | Go to step 3. | Repair or replace harness and connector.
NOTE:
In this case, repair the following:
|
| 3 CHECK HARNESS BETWEEN TCM AND BRAKE LIGHT SWITCH CONNECTOR. Measure resistance of harness between TCM and chassis ground. Connector & terminal (B55) No. 24 - Chassis ground: |
Is the measured value more than 1 MΩ? | Go to step 4. | Repair ground short circuit in harness between TCM and brake light switch connector. |
4 CHECK INPUT SIGNAL FOR TCM.
|
Is the measured value less than 1 V? | Go to step 5. | Adjust or replace brake light switch. < Ref. to STOP LIGHT SWITCH , INSPECTION, STOP LIGHT SYSTEM. > |
| 5 CHECK INPUT SIGNAL FOR TCM. Measure voltage between TCM and chassis ground. Connector & terminal (B55) No. 24 (+) - Chassis ground (-): |
Is the measured value more than 10 V when depressing the brake pedal? | Go to step 6. | Adjust or replace brake light switch. < Ref. to STOP LIGHT SWITCH , INSPECTION, STOP LIGHT SYSTEMS. > |
| 6 CHECK POOR CONTACT. Check poor contact in TCM connector. |
Is there poor contact in TCM connector? | Repair poor contact in TCM connector. | Replace TCM. < Ref. to TRANSMISSION CONTROL MODULE (TCM) . > |