DTC 1- 2 (MAP sensor high voltage) 1. MAP sensor system Inspection 1

 

Turn the ignition switch ON and engine stop switch " ".

 

Check the MAP sensor with the HDS pocket tester.

 

Is about 5 V indicated?

 

YES – GO TO STEP 2.

 

NO – • Intermittent failure

• Loose or poor contact on the sensor unit 5P connector

 

Sensor Unit Power Line Inspection

Check the sensor unit power line inspection (page 4-8).

Is the sensor unit power line normal?

 

YES – GO TO STEP 3.

 

NO – Replace or repair the abnormal circuit.

 

4-11

PGM-FI SYSTEM

 

MAP Sensor System Inspection 2

Turn the ignition switch OFF.

Disconnect the sensor unit 5P connector [1].

Connect the sensor unit 5P connector terminals at the wire side with a jumper wire [2].

Connection:

Light green/black – Green/white

Turn the ignition switch ON and engine stop switch " ".

 

Check the MAP sensor with the HDS pocket tester.

 

Is about 0 V indicated?

 

YES – Faulty sensor unit (MAP sensor)

 

NO – GO TO STEP 4.

 

MAP Sensor Output Line Open Circuit Inspection

Turn the ignition switch OFF.

Remove the jumper wire.

Disconnect the ECM 33P (Black) connector [1].

Check the continuity between the ECM 33P (Black) connector and sensor unit 5P connector [2] of the wire side.

Connection:

Light green/black – Light green/black

 

TOOL:
Test probe	07ZAJ-RDJA110
Is there continuity?
YES	–Replace the ECM with a known good one
	and recheck.
NO	–Open circuit in Light green/black wire

 

 

[2]

 

 

G/W Lg/Bl

 

[1]

 

Lg/Bl

 

Lg/Bl

 

[2]

[1]

 

DTC 7 (ECT SENSOR)

Before starting the inspection, check for loose or poor contact on the ECT sensor 3P connector and recheck the MIL blinking.

 

5 V

 

ECT SENSOR

 

ECM

 

Y/Bu

 

 

G/W

 

 

Probable cause

 

• Open or short circuit in Yellow/blue wire between the ECT sensor and ECM

• Open circuit in Green/white wire between the ECT sensor and ECM

 

• Faulty ECT sensor

• Faulty ECM

 

4-12

PGM-FI SYSTEM

DTC 7-1 (ECT SENSOR LOW VOLTAGE) 1. ECT Sensor System Inspection

 

Turn the ignition switch ON and engine stop switch " ".

 

Check the ECT sensor with the HDS pocket tester.

 

Is about 0 V indicated?

 

YES – GO TO STEP 2.

 

NO – Intermittent failure

 

ECT Sensor Inspection

Turn the ignition switch OFF.

Disconnect the ECT sensor 3P connector.

Turn the ignition switch ON and engine stop switch " ".

Check the ECT sensor with the HDS pocket tester.

 

Is about 0 V indicated?

 

YES	–GO TO STEP 4.
NO	–GO TO STEP 3.

 

ECT Sensor Resistance Inspection

Turn the ignition switch OFF.

Measure the resistance at the ECT sensor [1] terminals.

Standard: 2.3 – 2.6 kΩ (20°C/68°F)

Is the resistance within 2.3 – 2.6 kΩ (20°C/68°F)?

 

YES – Replace the ECM with a known good oneand recheck.

 

NO	–Faulty ECT sensor
			[1]
4. ECT Sensor Short Circuit Inspection
Turn the ignition switch OFF.
			[1]
Check for continuity between the ECT sensor 3P
connector [1] of the wire side and ground.
Connection: Yellow/blue – Ground
Is there continuity?			Y/Bu
YES	–Short circuit in Yellow/blue wire
NO	–Replace the ECM with a known good one
	and recheck.

 

 

4-13

PGM-FI SYSTEM

 

DTC 7-2 (ECT SENSOR HIGH VOLTAGE)

 

ECT Sensor System Inspection

Turn the ignition switch ON and engine stop switch " ".

Check the ECT sensor with the HDS pocket tester.

 

Is about 5 V indicated?

 

YES – GO TO STEP 2.

 

NO – • Intermittent failure

 

• Loose or poor contact on the ECT sensor 3P connector

 

ECT Sensor Inspection

Turn the ignition switch OFF.

Disconnect the ECT sensor 3P connector [1].

Connect the ECT sensor 3P connector terminals at the wire side with a jumper wire [2].

Connection: Yellow/blue – Green/white

Turn the ignition switch ON and engine stop switch " ".

Check the ECT sensor with the HDS pocket tester.

Is about 0 V indicated?

 

YES – Inspect the ECT sensor (page 4-46).

 

NO – GO TO STEP 3.

 

ECT Sensor Open Circuit Inspection

Turn the ignition switch OFF.

Remove the jumper wire.

Disconnect the ECM 33P (Black) connector [1].

Check the continuities between the ECM 33P (Black) connector and ECT sensor 3P connector [2] of the wire side.

Connection: Yellow/blue – Yellow/blue Green/white – Green/white

 

TOOL:
Test probe	07ZAJ-RDJA110
Is there continuity?
YES	–Replace the ECM with a known good one
	and recheck.
NO	–•	Open circuit in Yellow/blue wire
	• Open circuit in Green/white wire

 

[1]

 

 

Y/Bu G/W

 

[2]

 

[2]

 

 

G/W

 

G/W

 

Y/Bu _Y/Bu

 

[1]

 

4-14

PGM-FI SYSTEM

 

DTC 8 (TP SENSOR)

 

 

SENSOR UNIT
					5 V
(TP SENSOR)
			Y/R
				Y
			G/W

 

Probable cause

 

• Open circuit in Yellow/red wire between the sensor unit and ECM

• Open or short circuit in Yellow wire between the sensor unit and ECM

 

• Open circuit in Green/white wire between the sensor unit and ECM

 

• Faulty sensor unit

• Faulty ECM