Ford Ranger EV. Electric Manual - part 52

LESSON 5: DIAGNOSIS

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13. Select the lowest five PIDS from above, and again view their voltage readings using the BAT_MV PID.

Record their voltage readings.

   BATTERY VOLTAGE READINGS

Battery #

14. Select the lowest three readings from the modules above.

   BATTERY VOLTAGE READINGS

Battery #

Module Replacement Criteria

•

If the lowest voltage battery is 0.1 less than the second lowest voltage battery, replace the lowest voltage

battery module.

•

If the second lowest voltage battery is more than 0.08-volts less than the third lowest voltage battery, replace

the second lowest voltage battery.

•

Prior to replacing the module, verify the serviceability of the battery’s sense lead (measure for resistance of

30.9 K ohms), and verify the module’s voltage reading with a DVOM.

Sense Lead Criteria

•

If two adjoining modules are indicating incorrectly, the sense lead should be suspected and its resistance

should be measured.

•

Resistance specification is 30.9 K ohms.

LESSON 5: DIAGNOSIS

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Emergency Power Off (EPO)

In the event an unsafe condition occurs that will disable an interlock or if the inertia switch is triggered, an EPO

signal will be sent to disable all high voltage loads.

•

Can be set by IAA, BCM, or TIM.

•

An EPO event will be accompanied by multiple instrument cluster lights illuminating and the vehicle shutting

down.

•

If an EPO occurs, a DTC will be set that will aid you in locating the source of the concern. Refer to the Ranger

EV service publications for EPO diagnostic procedures.

LESSON 5: DIAGNOSIS

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NOTES

LESSON 5: DIAGNOSIS

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ACTIVITY 13 – DIAGNOSIS – WORKSHEET S1 (BDS)

BATTERY AND SENSE LEAD DIAGNOSIS

STUDENT ANSWER SHEET

OBJECTIVE:

The student will safely and accurately diagnose a Ranger EV concern.

DIRECTIONS:

Go to the workstation as directed by the instructor. Perform the tasks and answer the question

below.

1. Retrieve DTCs from the classroom vehicle. In what order should the modules be checked for DTCs? _____

______________________________________________________________________________________

2. List any DTCs present and in which module you found them? ____________________________________

______________________________________________________________________________________

3. What section of the workshop manual will provide diagnostic direction? ____________________________

______________________________________________________________________________________

4. What does this DTC indicate? ______________________________________________________________

______________________________________________________________________________________

5. What section of the workshop manual contains the pinpoint tests required to diagnose this fault? _________

______________________________________________________________________________________

6. Perform the diagnostic steps and list your results in the table below.

DIAGNOSTIC STEP

RESULT

PPT B1

NO

B2

NO, INTEGER 4 OR 5 IS PRESENT

B3

YES

B4

YES

B5

NO, REPLACE HARNESS IN QUESTION

B6

NO, SYSTEM OK

7. According to the service publications, what must be done before installing a new battery module? ________

______________________________________________________________________________________

END OF WORKSHEET S1