Transmission Control Systems
TROUBLE CODE 12DUTY SOLENOID B
Diagnosis
Output signal circuit of Duty Solenoid B is open or shorted.
Trouble Symptom
No "locking-up" (after Engine warm-up).
1. Measure signal voltage output emitted from Transmission Control Module (TCM).
a. Raise vehicle and support with safety stands.
CAUTION: On AWD models, raise all wheels off ground.
b. Warm up the Engine and Transmission.
c. Move shift lever to "D" and slowly increase vehicle speed to 60 km/h (37 MPH). Measure voltage output emitted from TCM.
Connector & Terminal / Specified Voltage:
(B52) No. 7 - No. 13 / 8.5 Volts, minimum (when wheels are locked-up.)
d. Return the engine to idling speed. Move shift lever to "N" and measure voltage output emitted from TCM.
Connector & Terminal / Specified Voltage:
(B33) No. 7 - No. 13 / 0.5 Volts, maximum
Select Monitor Function Mode.
- Mode: F12
- Condition:
Start the Engine and increase vehicle speed to 60 km/h (37 MPH). When wheels are locked-up.
- Specified Data:
LUDTY F12
95% (Wheel locked-up)
5% (Release)
2. Check harnesses and connectors between TCM and Duty Solenoid B.
a. Disconnect connector from TCM.
b. Disconnect connector from Transmission.
c. Measure resistance between TCM connector and Transmission and between TCM connector and body.
Connector & Terminal / Specified Resistance:
(B52) No. 7 - (B9) No. 6 / 0 Ohms.
(B52) No. 7 - Body / 1 M-Ohms, minimum
3. Check Duty Solenoid B ground line.
a. Disconnect connector from Transmission.
b. Measure resistance between Transmission connector receptacle and Transmission case.
Connector & Terminal / Specified Resistance:
(T4) No. 4 - Transmission / 1 Ohm, maximum
4. Check Duty Solenoid B.
a. Disconnect connector from Transmission.
b. Measure resistance between Transmission connector receptacle terminals.
Connector & Terminal / Specified Resistance:
(T4) No. 6 - No. 4 / 10 - 17 Ohms.