MASS AIR FLOW (MAF) SENSOR, CHECKING - BOSCH
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1 2004 Audi A6 Sedan (4B2) V6-2.7L Turbo (BEL) Vehicle > Powertrain Management > Computers and Control Systems > Testing and Inspection > Component Tests and General Diagnostics > Component Tests > Mass Air Flow (MAF) Sensor -G70-, Checking > With Generic Scan Tool MASS AIR FLOW (MAF) SENSOR, CHECKING - BOSCH Mass Air Flow ( MAF) Sensor, Checking NOTE: Use only gold-plated terminals when servicing terminals in harness connector of Mass Air Flow (MAF) sensor. Recommended special tools and equipment - VAG1526 multimeter or VAG1715 multimeter - VAG1594 connector test kit - Wiring diagram Test requirements 1/8
2 - The respective fuses of Mass Air Flow (MAF) Sensor -G70- must be OK. - Fuel Pump (FP) Relay -J17- must be OK. - Battery voltage must be at least 11.5 volts. - All electrical consumers like, for example, lights and rear window heating must be switched off. - Parking brake must be engaged or else daylight driving lights will be switched on. - If vehicle is equipped with an A/C system, it must be switched off. - Ground (GND) connections between engine and chassis must be OK. - Coolant temperature must be at least 80 degree C, Diagnostic mode 1: Check measuring values; PID 5, Coolant temperature. See: Computers and Control Systems > Scan Tool Testing and Procedures > Diagnostic Mode 1: Check Measuring Values Function test - Connect diagnostic tester. See: Computers and Control Systems > Reading and Clearing Diagnostic Trouble Codes > Diagnostic Tester, Connecting - Start engine and let run at idle. - Under address word 33, select "Diagnostic mode 1: Checking measuring values." - Select the measuring value "PID 16: Air flow quantity at Mass Air Flow (MAF) sensor". - Check specified value of air flow quantity at Mass Air Flow (MAF) Sensor at idle: 2/8
3 - End diagnosis and switch ignition off. If specified value is obtained, but DTC memory has a DTC concerning Mass Air Flow (MAF) sensor: - Check voltage supply of Mass Air Flow (MAF) sensor. See: Air Flow Meter/Sensor > Component Tests and General Diagnostics > Mass Air Flow (MAF) Sensor, Checking - Hitachi If specified value is not obtained: - Check signal and Ground (GND) wires of Mass Air Flow (MAF) sensor. See: Air Flow Meter/Sensor > Component Tests and General Diagnostics > Mass Air Flow (MAF) Sensor, Checking - Hitachi Voltage Supply For Mass Air Flow (MAF) Sensor, Checking (Bosch MAF Sensor) 3/8
4 - Disconnect connector from Mass Air Flow (MAF) sensor. - Connect multimeter to terminal 2 of connector and engine Ground (GND) for voltage measurement. - Operate starter briefly. Specified value: approx.. battery voltage NOTE: Voltage is supplied to Mass Air Flow (MAF) sensor from Fuel Pump (FP) relay. If there is no battery voltage. - Check wire connection from terminal 2 of connector to Fuel Pump (FP) relay via fuse for open circuit and short circuit to Ground (GND), repair if necessary. 4/8
5 - Connect multimeter to terminal 2 and terminal 3 of connector for voltage measurement. - Operate starter briefly. Specified value: approx.. battery voltage NOTE: Ground (GND) from the ECM is present at terminal 3 of connector. If specified value is not obtained, check wire connections. 5/8
6 - Connect multimeter to terminal 3 and terminal 4 of connector for voltage measurement. - Switch ignition on. Specified value: approx.. 5 volts. If specified value is not obtained, check wire connections. Wire Connections For Mass Air Flow (MAF) Sensor, Checking (Bosch MAF Sensor) NOTE: Signal wire is also checked during wire test. - Connect test box to control module wiring harness, connect test box for wiring test. See: Computers and Control Systems > Reading and Clearing Diagnostic Trouble Codes > Test Box, Connecting For Wiring Test 6/8
7 - The following wire connections must be checked for short circuit to B+, Ground (GND) and for open circuit Connector for Mass Air Flow (MAF) Sensor -G VAG1598/31 test box terminal Wire resistance: max: 1.5 Ohm - Also check all wires for short circuit to each other. Specified value: Infinite Ohm (no continuity) - If the voltage supply and the wire connection are OK, replace Mass Air Flow (MAF) Sensor -G /8
8 8/8
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1. ENGINE CONTROL MODULE (ECM) I/O SIGNAL OBD0092A Crankshaft Camshaft Mass air flow Throttle Signal (+) 8 0 7 +7 Sensor output waveform Signal ( ) 29 0 0 Shield 54 0 0 Signal (+) 7 0 7 +7 Sensor output
DW: Heated Oxygen Sensor (HO2S)
2007 PCED On Board Diagnostics SECTION 5: Pinpoint Tests Procedure revision date: 03/29/2006 DW: Heated Oxygen Sensor (HO2S) DW: Introduction DW1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) Are DTCs P0040,
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1 of 14 9/4/2016 4:05 PM P0068-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION P0068-Manifold Pressure/Throttle Position Correlation Theory of Operation This DTC sets when an unexpected high intake manifold
Model Year Start: 2008 Model: GX470 Prod Date Range: [07/2007 ]
![Model Year Start: 2008 Model: GX470 Prod Date Range: [07/2007 ]](/thumbs/87/96773417.jpg "Model Year Start: 2008 Model: GX470 Prod Date Range: [07/2007 ]")
Last Modified: 7 27 2016 6.6 C Doc ID: RM000000YDP015X Model Year Start: 2008 Model: GX470 Prod Date Range: [07/2007 ] Title: 2UZ FE EINE CONTROL SYSTEM: SFI SYSTEM: P0100,P0102,P0103; Mass Air Flow Circuit
DTC P0505: IDLE AIR CONTROL (IAC) SYSTEM CIRCUIT
Page 1 of 5 DTC P0505: IDLE AIR CONTROL (IAC) SYSTEM CIRCUIT CAUTION: If ECM replacement is instructed in following testing, always ensure ECM connectors and ground circuit are okay. If either are suspect,
Distributor Ignition DI System Diagnosis
Page 1 of 8 2004 Chevrolet K Silverado - 4WD Sierra, Silverado VIN C/K Service Manual Engine Engine Controls - 4.3L Diagnostic Information and Procedures Document ID: 848577 Distributor Ignition DI System
DTC P0106. DTC Descriptor. Manifold Absolute Pressure (MAP) Sensor Performance. Circuit/System Description
DTC Descriptor Manifold Absolute Pressure (MAP) Sensor Performance Circuit/System Description The manifold absolute pressure (MAP) sensor measures the pressure inside the intake manifold. Pressure in the