TROUBLESHOOTING [ENGINE CONTROL FS]
DTC
P1487
EGR boost solenoid valve circuit malfunction
DESCRIPTION
• DTC P1487 indicates EGR boost solenoid valve circuit malfunction.
[Possible Cause]
• Damaged EGR boost solenoid valve
• Damaged PCM
• Open or shorted circuit
STEP
INSPECTION
ACTION
1
CHECK FOR POWER TO EGR BOOST
SOLENOID VALVE
• Disconnect EGR boost solenoid valve
connector.
• Key on, engine off.
• Measure voltage between power circuit at
solenoid valve connector and chassis
ground.
•
Is voltage greater than 10.5 volts?
Yes
Go to next step.
No
SERVICE open in EGR boost solenoid valve power circuit
between ignition switch and EGR boost solenoid valve.
RERUN OBD Test.
2
CHECK EGR BOOST SOLENOID VALVE
• Key off.
• EGR boost solenoid valve disconnected.
• Measure resistance of terminals EGR
boost solenoid valve.
•
Is resistance less than 5.0 ohms?
Yes
Go to next step.
No
REPLACE EGR boost solenoid valve.
RERUN OBD Test.
3
CHECK EGR BOOST SOLENOID VALVE
CIRCUIT FOR SHORT TO POWER
• Key off.
• EGR boost solenoid valve disconnected.
• Disconnect PCM. Inspect for damaged or
pushed out pins, corrosion, loose wires,
etc. Repair as necessary.
• Install breakout box. Leave PCM
disconnected.
• Key on, engine off.
• Measure voltage between Test Pin 98 at
breakout box and chassis ground.
•
is voltage less than 1.0 volts?
Yes
Go to next step.
No
SERVICE short to power.
REMOVE breakout box.
RECONNECT ail components.
RERUN OBD Test.
4
CHECK EGR BOOST SOLENOID VALVE
CIRCUIT FOR SHORT TO GROUND
• Key off.
• Disconnect NGS tester from DLC.
• Breakout box installed. Leave PCM
disconnected.
• EGR boost solenoid valve disconnected.
• Measure resistance between Test Pin 98
and Test Pin 51 or 103 and 91 at breakout
box.
• Is resistance greater than 10,000 ohms?
Yes
Go to next step.
No
SERVICE short circuit.
REMOVE breakout box.
RECONNECT all components.
RERUN OBD Test.
5
CHECK EGR BOOST SOLENOID VALVE
CIRCUIT CONTINUITY
• Key off.
• Breakout box installed.
• PCM disconnected.
• EGR boost solenoid valve disconnected.
• Measure resistance between EGR boost
solenoid connector signal terminal and Test
Pin 98 at breakout box.
• Is re sista n ce less th a n 5.0 o hm s?
Yes
REPLACE PCM.
RECONNECT all components.
RERUN OBD Test.
No
SERVICE open circuit.
REMOVE breakout box.
RECONNECT all components.
RERUN OBD Test.
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Summary of Contents for MX-6 1998
Page 1: ......
Page 501: ...STARTING SYSTEM 3 If not as specified replace the starter interlock switch 01 19 3...
Page 803: ...MANUAL TRANSAXLE W 6 U 5 1 5 W A C 05 15 7...
Page 934: ...CONTROL SYSTEM CONTROL SYSTEM STRUCTURAL VIEW W6U740WA0 07 40 2...
Page 983: ...SERVICE TOOLS 08 60 SERVICE TOOLS 08 RESTRAINTS S S T 08 60 1 08 RESTRAINTS SST 08 60 1...