6.2
SPN 91/FMI 3
7. Measure the resistance between pin 2 of the AP harness connector and pin 7 of the CPC
#1 connector.
[a] Measure the resistance between pin 2 of the AP harness connector and pin 7 of the
CPC #1 connector. Refer to section 6.1.1.1.
[b] If the resistance is less than 3
Ω
, replace the Accelerator Pedal. Refer to section
6.1.1.1.
6.1.1.1
Verify Repairs
Verify repairs as follows:
1. Turn the ignition OFF. Reconnect all connectors.
2. Turn ignition ON. Clear codes with diagnostic tool.
3. Start and run the engine for one minute. Stop engine.
4. Check diagnostic tool for codes.
[a] If no codes are displayed, troubleshooting is complete.
[b] If code 91/2 is not logged, and other codes are logged, troubleshoot the logged codes.
[c] If code 91/2 and other codes are logged, review this section to
fi
nd the error. If no
error is found, call the Detroit Diesel Customer Support Center (313–592–5800).
6.2
SPN 91/FMI 3
The typical diagnosis for this fault is high voltage.
6.2.1
High Voltage Check
Check as follows:
1. Disconnect the Accelerator Pedal (AP).
2. Turn ON the ignition (key ON, engine OFF).
3. Measure the voltage between pins 1 and 3 of the AP harness connector.
[a] If the voltage is between 4.5 and 5.5 volts, go to step 5.
[b] If the voltage is less than 4.5, 4.
4. Measure the voltage between pins 1 of the AP harness connector and ground.
[a] If the voltage is between 4.5 and 5.5 volts, repair the open circuit between pin 3 of the
AP harness connector and pin 4 of the CPC #1 connector. Refer to section 6.2.1.1.
[b] If the voltage is less than 4.5, repair the open circuit between pin 1 of the AP harness
connector and pin 8 of the CPC #1 connector. Refer to section 6.2.1.1.
5. Turn OFF the ignition.
6. Disconnect the CPC #1 connector.
All information subject to change without notice.
6-4
PRELIMINARY 6SE567 0512
Copyright © 2005 DETROIT DIESEL CORPORATION
Summary of Contents for Series 60 DDEC VI
Page 1: ......
Page 2: ......
Page 89: ...4 SPN 84 VEHICLE SPEED SENSOR Section Page 4 1 SPN 84 FMI 3 4 3 4 2 SPN 84 FMI 4 4 4 ...
Page 93: ...5 SPN 86 ADAPTIVE CRUISE CONTROL FAULT Section Page 5 1 SPN 86 FMI 14 5 3 ...
Page 201: ...21 SPN 625 CAN FAULT Section Page 21 1 SPN 625 FMI 2 9 10 13 14 21 3 21 2 SPN 625 FMI 4 21 5 ...