P1102

DTC P1102
PRESSURE SOURCES SWITCHING SOLENOID VALVE CIRCUIT MALFUNCTION (BR)

Description
- The Pressure Sensor is used in A/T vehicles. It is located in the Engine compartment at the front of the right-hand suspension. It consists of a solenoid which switches between the atmospheric pressure and suction pressure lines and a Pressure Sensor. This arrangement allows either pressure line to be monitored.
- A sensor output signal is sent to the Engine Control Module (ECM) to diagnose the Exhaust Gas Recirculation (EGR) system and Evaporative Emission Control System.
- The Pressure Sensor is not used in M/T vehicles.

DTC Detecting Condition
Two consecutive trips with fault.

Trouble Symptom
- Erroneous idling.
- Failure of engine to start.











1. Check transmission type.

2. Check output signal from Engine Control Module (ECM).





a. Turn ignition switch to "ON".
b. Measure voltage between ECM and body.
[CHECK]: Connector & terminal:
(B84) No. 58 - Body/10 Volts, or more.
[YES]: Go to step 3.
[NO]: Go to step 4.

3. Check harness connector.





a. Turn ignition switch to "OFF".
b. Disconnect connector from pressure sources switching solenoid valve.
c. Turn ignition switch to "ON".
d. Measure voltage between ECM and body.
[CHECK]: Connector & terminal:
(B84) No. 58 - Body/10 Volts or more.
[YES]: Repair short circuit of harness between ECM connector and pressure sources switching solenoid valve connector and replace ECM.
[NO]: Go to next [CHECK].

[CHECK]: Is there poor contact in ECM connector?
[YES]: Repair poor contact in ECM connector.
[NO]: Replace ECM with a new one.

4. Check harness connector.





a. Turn ignition switch to "OFF".
b. Disconnect connector from pressure sources switching solenoid valve and ECM.
c. Measure resistance of harness connector between pressure sources switching solenoid valve and body.
[CHECK]: Connector & terminal:
(B1) No. 1 - Body/10 Ohms or less.
[YES]: Repair short circuit of harness between ECM connector and pressure sources switching solenoid valve connector.
[NO]: Go to next step.





d. Measure resistance of harness connector between ECM and pressure sources switching solenoid valve.
[CHECK]: Connector & terminal:
(B84) No. 58 - (B1) No. 1/10 M-Ohms or less.
[YES]: Go to step 5.
[NO]: Repair open circuit of harness between ECM connector and pressure sources switching solenoid valve connector.

5. Check pressure sources switching solenoid valve.





- Measure resistance between pressure sources switching solenoid valve connector terminals.
[CHECK]: Terminals:
No. 1 - No. 2/10 - 100 Ohms.
[YES]: Go to step 6.
[NO]: Replace pressure sources switching solenoid valve.

6. Check power supply to pressure sources switching solenoid valve.





a. Turn ignition switch to "ON".
b. Measure voltage between pressure sources switching solenoid valve harness connector and body.
[CHECK]: Connector & terminal:
(B1) No. 2 - Body/10 Volts or more.
[YES]: Confirm good connection at pressure sources switching solenoid valve connector.
[NO]: Repair open circuit of harness between main relay connector and pressure sources switching solenoid valve connector.