Ford Ranger EV (2001 year). Manual - part 70

310-02-3

310-02-3

Acceleration Control

•

DTC C1855 Acceleration Position Sensor Conflict

DIAGNOSIS AND TESTING

Acceleration Control

— DTC C1855 is set if there is a conflict

between the three accelerator position sensor

Diagnostic Trouble Code (DTC) Definition

(APS) signals. It may also occur if there is an

The following DTCs relate to the acceleration

out of range condition for the sensors (DTC

position sensor (APS):

C1750). If this failure occurs, the malfunction
indicator lamp  (MIL) illuminates, the power

•

DTC C1750 Acceleration Position Sensor Out Of

limit warning indicator flashes, and the motor

Range 

is capable of only creep torque (limited

— The accelerator position sensor (APS) is

power). 

mounted to the accelerator pedal assembly and

Electrical Schematic

consists of three integrated sensors that
indicate the accelerator pedal position to the

Refer to Electrical and Vacuum Troubleshooting

traction inverter module (TIM). DTC C1750 is

Manual, Cell 26, Motor/Transaxle Control for

set when one or more of  these sensors are out

schematic and connector information.

of range. If this failure occurs, the malfunction

Inspection and Verification

indicator lamp (MIL) illuminates, the power
limit warning indicator flashes, and the motor

Refer to 

 Section 100-07

.

is capable of only creep torque (limited
power). 

Symptom Chart

Symptom Chart

Condition

Possible Sources

Action

• 

DTC C1750 Acceleration 

• 

Traction inverter module 

• 

GO to 

Pinpoint Test A. 

Position Sensor (APS) Out of

(TIM). 

Range 

•

Circuit(s). 

•

acceleration position sensor

(APS). 

• 

DTC C1855 Acceleration 

• 

Traction inverter module 

• 

GO to 

Pinpoint Test B.

Position Sensor (APS)

(TIM). 

Conflict 

•

Circuit(s). 

•

acceleration position sensor

(APS). 

Pinpoint Tests

Special Tool(s)

104-Pin Breakout Box (BOB) 418-049 (014-00950) or

equivalent 

BCM/TIM Breakout Box (BOB) Adapter Cable

418-F212

BCM/TIM Breakout Box (BOB) Overlay 418-F220

PINPOINT TEST A: DTC C1750 ACCELERATION POSITION SENSOR (APS) OUT OF RANGE

TEST STEP

ACTION TO TAKE

A1 CHECK ACCELERATION POSITION SENSOR ONE (APS1)

SIGNAL

•

With key ON, monitor the traction inverter module (TIM) PID AP1V. 

Yes =

GO to A7.

(Continued)

310-02-4

310-02-4

Acceleration Control

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST A: DTC C1750 ACCELERATION POSITION SENSOR (APS) OUT OF RANGE

TEST STEP

ACTION TO TAKE

•

Depress the accelerator pedal. 

No =

GO to A2.

•

Does the AP1V PID vary within the range of 0.25 and 4.85 volts?

A2 CHECK CIRCUITS 3835 (Y/W), 3836 (Y/LB), AND 3837 (GY/Y)

(TO APS1) FOR OPEN(S)

•

Connect 104-Pin Breakout Box (BOB) to traction inverter module (TIM)

Yes =

GO to A3.

C4998 and C4999, using the BCM/TIM BOB Adapter Cable and

Overlay; leave the TIM disconnected. 

•

With key OFF, disconnect acceleration position sensor (APS) C2995 and

No =

REPAIR the wire(s) in

measure the resistance of the Y/LB wire between pin G on APS C2995

question.

and BOB pin B5. 

•

With key OFF, measure the resistance of the GY/Y wire between pin A

on APS C2995 and BOB pin B3. 

•

With key OFF, measure the resistance of the Y/W wire between pin F on

APS C2995 and BOB pin B4. 

•

Are the resistances less than 5 ohms?

A3 CHECK CIRCUITS 3835 (Y/W) AND 3836 (Y/LB) (TO APS1) FOR

SHORT(S) TO GROUND

•

With key OFF, measure the resistance between BOB pins B4, B5 and

Yes =

GO to A4.

ground (BOB pin A29). 

•

Are the resistances greater than 10,000 ohms?

No =

REPAIR the wire(s) in

question.

A4 CHECK CIRCUITS 3835 (Y/W) AND 3836 (Y/LB) (TO APS1) FOR

SHORT(S) TO POWER

•

With key ON, measure the voltage between BOB pins B4, B5 and

Yes =

REPAIR the wire(s) in

ground (BOB pin A29). 

question.

•

Are any of the voltages greater than 0 volts?

No =

GO to A5.

A5 CHECK APS1 REFERENCE VOLTAGE

•

With key OFF, connect TIM to BOB; leave BOB connected to TIM

Yes =

GO to A6.

C4998 and C4999. 

•

With key ON, measure the voltage between BOB pin B5 and ground

No =

REPLACE the TIM. REFER

(BOB pin A29). to 

Section 303-14.

•

Is the voltage between 4.9 and 5.1 volts?

A6 CHECK APS1 SIGNAL

•

With key OFF, reconnect APS C2995. 

Yes =

REPLACE the TIM. REFER

to 

Section 303-14.

•

With key ON, measure the voltage between BOB pins B3 and B4 while

No =

REPLACE the APS.

depressing the accelerator pedal from idle to wide open throttle (WOT). 

•

Does the voltage vary within the range of 0.25 and 4.85 volts?

A7 CHECK ACCELERATION POSITION SENSOR TWO (APS2)

SIGNAL

•

With key ON, monitor the TIM PID AP2V. 

Yes =

GO to A13.

•

Depress the accelerator pedal. 

No =

GO to A8.

•

Does the AP2V PID vary within the range of 4.75 and 0.15 volts?

A8 CHECK CIRCUITS 3010 (T), 3011 (BK/O), AND 3012 (W) (TO

APS2) FOR OPEN(S)

•

Connect 104-Pin Breakout Box (BOB) to TIM C4998 and C4999, using

Yes =

GO to A9.

the BCM/TIM BOB Adapter Cable and Overlay; leave the TIM

disconnected. 

(Continued)

310-02-5

310-02-5

Acceleration Control

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST A: DTC C1750 ACCELERATION POSITION SENSOR (APS) OUT OF RANGE

TEST STEP

ACTION TO TAKE

•

With key OFF, disconnect acceleration position sensor (APS) C2995 and

No =

REPAIR the wire(s) in

measure the resistance of the T wire between pin D on APS C2995 and

question.

BOB pin B11. 

•

With key OFF, measure the resistance of the BK/O wire between pin B

on APS C2995 and BOB pin B9. 

•

With key OFF, measure the resistance of the W wire between pin C on

APS C2995 and BOB pin B10. 

•

Are the resistances less than 5 ohms?

A9 CHECK CIRCUITS 3010 (T) AND 3012 (W) (TO APS2) FOR

SHORT(S) TO GROUND

•

With key OFF, measure the resistance between BOB pins B4, B5 and

Yes =

GO to A10.

ground (BOB pin A29). 

•

Are the resistances greater than 10,000 ohms?

No =

REPAIR the wire(s) in

question.

A10 CHECK CIRCUITS 3010 (T) AND 3012 (W) (TO APS2) FOR

SHORT(S) TO POWER

•

With key ON, measure the voltage between BOB pins B10, B11 and

Yes =

REPAIR the wire(s) in

ground (BOB pin A29). 

question.

•

Are any of the voltages greater than 0 volts?

No =

GO to A11.

A11 CHECK APS2 REFERENCE VOLTAGE

•

With key OFF, connect TIM to BOB; leave BOB connected to TIM

Yes =

GO to A12.

C4998 and C4999. 

•

With key ON, measure the voltage between BOB pin B11 and ground

No =

REPLACE the TIM. REFER

(BOB pin A29). to 

Section 303-14.

•

Is the voltage between 4.9 and 5.1 volts?

A12 CHECK APS2 SIGNAL

•

With key OFF, reconnect APS C2995. 

Yes =

REPLACE the TIM. REFER

to 

Section 303-14.

•

With key ON, measure the voltage between BOB pins B9 and B10 while No =

REPLACE the APS.

depressing the accelerator pedal from idle to wide open throttle (WOT). 

•

Does the voltage vary within the range of 4.00 and 0.15 volts?

A13 CHECK ACCELERATION POSITION SENSOR THREE (APS3)

SIGNAL

•

With key ON, monitor the traction inverter module (TIM) PID AP3V. 

Yes =

System OK. CHECK wiring

for intermittent connections.

•

Depress the accelerator pedal. 

No =

GO to A14.

•

Does the AP3V PID vary within the range of 4.00 and 1.56 volts?

A14 CHECK CIRCUITS 3013 (GY/BK), 3014 (BK/W), AND 3015 (W/R)

(TO APS3) FOR OPEN(S)

•

Connect 104-Pin Breakout Box (BOB) to traction inverter module (TIM)

Yes =

GO to A15.

C4998 and C4999, using the BCM/TIM BOB Adapter Cable and

Overlay; leave the TIM disconnected. 

•

With key OFF, disconnect acceleration position sensor (APS) C2995 and

No =

REPAIR the wire(s) in

measure the resistance of the GY/BK wire between pin E on APS C2995

question.

and BOB pin B17. 

•

With key OFF, measure the resistance of the BK/W wire between pin J

on APS C2995 and BOB pin B15. 

•

With key OFF, measure the resistance of the W/R wire between pin K

on APS C2995 and BOB pin B16. 

•

Are the resistances less than 5 ohms?

A15 CHECK CIRCUITS 3013 (GY/BK) AND 3015 (W/R) (TO APS3)

FOR SHORT(S) TO GROUND

(Continued)

310-02-6

310-02-6

Acceleration Control

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST A: DTC C1750 ACCELERATION POSITION SENSOR (APS) OUT OF RANGE

TEST STEP

ACTION TO TAKE

•

With key OFF, measure the resistance between BOB pins B16, B17 and

Yes =

GO to A16.

ground (BOB pin A29). 

•

Are the resistances greater than 10,000 ohms?

No =

REPAIR the wire(s) in

question.

A16 CHECK CIRCUITS 3013 (GY/BK) AND 3015 (W/R) (TO APS3)

FOR SHORT(S) TO POWER

•

With key ON, measure the voltage between BOB pins B16, B17 and

Yes =

REPAIR the wire(s) in

ground (BOB pin A29). 

question.

•

Are any of the voltages greater than 0 volts?

No =

GO to A17.

A17 CHECK APS3 REFERENCE VOLTAGE

•

With key OFF, connect TIM to BOB; leave BOB connected to TIM

Yes =

GO to A18.

C4998 and C4999. 

•

With key ON, measure the voltage between BOB pin B17 and ground

No =

REPLACE the TIM. REFER

(BOB pin A29). to 

Section 303-14.

•

Is the voltage between 4.9 and 5.1 volts?

A18 CHECK APS3 SIGNAL

•

With key OFF, reconnect APS C2995. 

Yes =

REPLACE the TIM. REFER

to 

Section 303-14.

•

With key ON, measure the voltage between BOB pins B15 and B16

No =

REPLACE the APS.

while depressing the accelerator pedal from idle to wide open throttle

(WOT). 

•

Does the voltage vary within the range of 4.00 and 1.56 volts?

PINPOINT TEST B: DTC C1855 ACCELERATION POSITION SENSOR (APS) CONFLICT

TEST STEP

ACTION TO TAKE

B1 CHECK FOR OTHER DIAGNOSTIC TROUBLE CODES (DTCs)

• 

Does DTC C1750 Acceleration Position Sensor Out of Range occur Yes = GO to 

Pinpoint Test A.

along with DTC C1855?

No =

GO to B2.

B2 CHECK CIRCUITS 3835 (Y/W), 3012 (W), AND 3015 (W/R) FOR

SHORT(S)

•

Connect 104-Pin Breakout Box (BOB) to traction inverter module (TIM)

Yes =

REPAIR the wire(s) in

C4998 and C4999, using the BCM/TIM BOB Adapter Cable and

question.

Overlay; leave the TIM disconnected. 

•

With key OFF, disconnect acceleration position sensor (APS) C2995 and

No =

REPLACE the APS.

measure the resistance between BOB pins B4 and B10, BOB pins B4

and B16, and BOB pins B10 and B16. 

•

Are any of the resistances less than 5 ohms?

REMOVAL AND INSTALLATION

Acceleration Position Sensor

Removal

1. NOTE: The acceleration position sensor (APS)

is mounted on the lower driver side bulkhead
and is connected to the throttle pedal. 
Disconnect the electrical connector.