Inspect Mass Air Flow Meter Vg Voltage

Toyota Dash Repair

(a) Inspect output voltage.

(1) Disconnect the C2 MAF meter connector.

(2) Apply battery voltage across terminals +B and E2G.

(3) Connect the positive (+) tester probe to terminal VG, and the negative (-) tester probe to terminal E2G.

(4) Measure the voltage. Standard voltage

Tester Connection

Specified Condition

5 (VG) - 4 (E2G)

0.2 to 4.9 V

(5) Reconnect the MAF meter connector.

NG

REPLACE MASS AIR FLOW METER

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

Wire Harness Side:

MAF Meter Connector

MAF Meter Connector

ECM Connector

fr-

1 II

/-

(a) Disconnect the C2 MAF meter connector.

(b) Disconnect the C24 ECM connector.

(c) Measure the resistance between the terminals of the wire harness side connectors.

Standard resistance (Check for open)

Tester Connection

Specified Condition

C2-5 (VG) - C24-118 (VG)

Below 1 Q

C2-4 (E2G) - C24-116 (E2G)

Below 1 Q

Standard resistance (Check for short)

Tester Connection

Specified Condition

C2-5 (VG) or C24-118 (VG) - Body ground

10 kQ or higher

(d) Reconnect the MAF meter connector.

(e) Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ENGINE ROOM J/B)

Wire Harness Side:

MAF Meter Connector

MAF Meter Connector

Engine Room J/B:

Engine Room J/B:

Engine Room R/B:

DDDD DDDDD

OO 1

M !□□□□□!

(1) Remove the EFI No. 3 fuse from the engine room R/ B.

(2) Measure the EFI No. 3 fuse resistance. Standard resistance:

Below 1 Q

(b) Disconnect the C2 MAF meter connector.

(c) Remove the engine room J/B from the engine room R/B.

(d) Disconnect the 1E engine room J/B connector.

(e) Measure the resistance between the terminals. Standard resistance (Check for open)

Tester Connection

Specified Condition

C2-3 (+B) - 1E-6

Below 1 Q

Standard resistance (Check for short)

Tester Connection

Specified Condition

C2-3 (+B) or 1E-6 - Body ground

10 kQ or higher

(f) Reconnect the MAF meter connector.

(g) Reconnect the engine room J/B connector.

(h) Reinstall the engine room J/B.

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK ECM POWER SOURCE CIRCUIT

CHECK HARNESS AND CONNECTOR (SENSOR GROUND)

Toyota Air Flow Meter Pinout

(a) Disconnect the C2 MAF meter connector.

(b) Measure the resistance. Standard resistance

Tester Connection

Specified Condition

C2-4 (E2G) - Body ground

Below 1 Q

(c) Reconnect the MAF meter connector.

OK

REPLACE MASS AIR FLOW METER

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

Wire Harness Side:

MAF Meter Connector

MAF Meter Connector

(C24 ECM Connector

1 II

A127959E10

(a) Disconnect the C2 MAF meter connector.

(b) Disconnect the C24 ECM connector.

(c) Measure the resistance between the terminals of the wire harness side connectors.

Standard resistance (Check for open)

Tester Connection

Specified Condition

C2-5 (VG) - C24-118 (VG)

Below 1 Q

C2-4 (E2G) - C24-116 (E2G)

Below 1 Q

Standard resistance (Check for short)

Tester Connection

Specified Condition

C2-5 (VG) or C24-118 (VG) - Body ground

10 kQ or higher

(d) Reconnect the MAF meter connector.

(e) Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM

Mass Air Flow Circuit Range / Performance Problem

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Responses

  • ruairi
    How many voltage does toyota mass air flow has?
    1 year ago
  • arsenio buccho
    How to test maf on 2000 toyota camry?
    1 year ago

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