P0548

2UR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0545,P0546,P0548,P0549,P2032,P2033,P2035,P2036: Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 1)
P2036 - Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 2)

DESCRIPTION





The four exhaust gas temperature (EGT) sensors are located on the hydro-carbon adsorber catalyst (HCAC).

The engine control module (ECM) applies the 5-volt reference voltage to the EGT sensor. The sensor changes the voltage between 0.1 V and 4.9 V according to the EGT. The ECM uses the EGT sensors to monitor the HCAC valve operation.





MONITOR DESCRIPTION

To monitor the EGT sensor, the ECM measures the sensor voltage. If the sensor voltage deviates from the normal operating range, the ECM interprets this as a malfunction. When this malfunction is detected in consecutive driving cycles, the ECM illuminates the malfunction indicator lamp (MIL) and sets the diagnosis trouble code (DTC).

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





TYPICAL MALFUNCTION THRESHOLDS

P0546, P0548, P2032, P2035 (Low Voltage)





P0546, P0549, P2033, P2036 (High Voltage)





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
When viewed from the rear of the engine assembly, Bank 1 is on the left side and Bank 2 is on the right side.

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Put the engine in inspection mode Inspection Mode Procedure.

(c) Turn the Techstream ON.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Exhaust Temperature B1S1, Exhaust Temperature B1S2, Exhaust Temperature B2S1 and Exhaust Temperature B2S2.

(e) Read the value.

Standard:

Same as the actual exhaust gas temperature.

Result:





HINT
- If there is a short circuit, the Techstream will indicate -40°C (-40°F).
- If there is an open circuit, the Techstream will indicate 1000°C (1832°F).

C -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems

B -- READ VALUE USING TECHSTREAM
A -- Continue to next step.

2. READ VALUE USING TECHSTREAM





(a) Disconnect the exhaust gas temperature sensor connectors.

(b) Connect terminals 1 and 2 or 3 and 4 of the exhaust gas temperature sensor wire harness side connector.

(c) Connect the Techstream to the DLC3.

(d) Turn the power switch on (IG).

(e) Turn the Techstream ON.

(f) Enter the following menus: Powertrain / Engine and ECT / Data List / Exhaust Temperature B1S1, Exhaust Temperature B1S2, Exhaust Temperature B2S1 and Exhaust Temperature B2S2.

(g) Read the value.

Standard:

-40°C (-40°F)

NG -- CHECK HARNESS AND CONNECTOR (EXHAUST GAS TEMPERATURE SENSOR - ECM)

OK -- CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE EXHAUST GAS TEMPERATURE SENSOR Removal

3. CHECK HARNESS AND CONNECTOR (EXHAUST GAS TEMPERATURE SENSOR - ECM)





(a) Disconnect the exhaust gas temperature sensor connectors.

(b) Disconnect the ECM.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM Removal

4. READ VALUE USING TECHSTREAM

(a) Disconnect the exhaust gas temperature sensor connectors.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream ON.

(e) Enter the following menus: Powertrain / Engine and ECT / Data List / Exhaust Temperature B1S1, Exhaust Temperature B1S2, Exhaust Temperature B2S1 and Exhaust Temperature B2S2.

(f) Read the value(s).

Standard:

1000°C (1832°F)

NG -- CHECK HARNESS AND CONNECTOR (EXHAUST GAS TEMPERATURE SENSOR - ECM)

OK -- REPLACE EXHAUST GAS TEMPERATURE SENSOR Removal

5. CHECK HARNESS AND CONNECTOR (EXHAUST GAS TEMPERATURE SENSOR - ECM)





(a) Disconnect the exhaust gas temperature sensor connectors.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal