Ford F150 Pickup. Instruction — part 1953

B1840

Wiper Front Power Circuit Failure

GEM/CTM

REFER to WIPERS AND WASHERS

- F150 .

P0500

Vehicle Speed Sensor Malfunction

GEM

REFER to TRANSFER CASE -

ESOF .

P1804

Transmission 4-Wheel Drive High

Indicator Circuit Failure

GEM

GO to PINPOINT TEST J .

P1806

Transmission 4-Wheel Drive High

Indicator Short Circuit to Battery

GEM

GO to PINPOINT TEST J .

P1812 Transmission 4-Wheel Drive Mode Select

Circuit Failure

GEM

REFER to TRANSFER CASE -

ESOF .

P1815 Transmission 4-Wheel Drive Mode Select

Short Circuit to Ground

GEM

REFER to TRANSFER CASE -

ESOF .

P1820

Transmission Transfer Case Clockwise

Shift Relay Coil Circuit Failure

GEM

REFER to TRANSFER CASE -

ESOF .

P1822

Transmission Transfer Case Clockwise

Shift Relay Coil Short Circuit to Battery

GEM

REFER to TRANSFER CASE -

ESOF .

P1824 Transmission 4-Wheel Drive Clutch Relay

Circuit Failure

GEM

GO to PINPOINT TEST G .

P1826 Transmission 4-Wheel Drive Low Clutch

Relay Short Circuit to Battery

GEM

GO to PINPOINT TEST G .

P1828

Transmission Transfer Case Counter

Clockwise Shift Relay Coil Circuit Failure

GEM

REFER to TRANSFER CASE -

ESOF .

P1830

Transmission Transfer Case Counter

Clockwise Shift Relay Coil Short Circuit

to Battery

GEM

REFER to TRANSFER CASE -

ESOF .

P1832

Transmission Transfer Case Differential

Lock-Up Solenoid Circuit Failure

GEM

GO to PINPOINT TEST H .

P1834

Transmission Transfer Case Differential

Lock-Up Solenoid Short Circuit to Battery

GEM

GO to PINPOINT TEST H .

P1838

Transmission Transfer Case Shift Motor

Circuit Failure

GEM

REFER to TRANSFER CASE -

ESOF .

P1846 Transmission Transfer Case Contact Plate

'A' Circuit Failure

GEM

REFER to TRANSFER CASE -

ESOF .

P1850 Transmission Transfer Case Contact Plate

'B' Circuit Failure

GEM

REFER to TRANSFER CASE -

ESOF .

P1854 Transmission Transfer Case Contact Plate

'C' Circuit Failure

GEM

REFER to TRANSFER CASE -

ESOF .

P1858 Transmission Transfer Case Contact Plate

'D' Circuit Failure

GEM

REFER to TRANSFER CASE -

ESOF .

P1866

Transmission Transfer Case System

Concern - Servicing Required

GEM

REFER to TRANSFER CASE -

ESOF .

P1867 Transmission Transfer Case Contact Plate

General Circuit Failure

GEM

REFER to TRANSFER CASE -

ESOF .

P1876

Transmission Transfer Case 2-Wheel

GEM

GO to PINPOINT TEST H .

2003 Ford Pickup F150

2003 TRANSMISSIONS Transfer Case - General Information - F150 Pickup

SYMPTOM CHART

SYMPTOM CHART

PINPOINT TESTS

Pinpoint Test G: 4X4 High Does Not Engage At Speed Correctly (Driveline Does Not Synchronize Correctly) But Does
Engage At Rest

Drive Solenoid Circuit Failure

P1877

Transmission Transfer Case 2-Wheel

Drive Solenoid Circuit Short to Battery

GEM

GO to PINPOINT TEST H .

P1891 Transmission Transfer Case Contact Plate

Ground Return Open Circuit

GEM

REFER to TRANSFER CASE -

ESOF .

Condition

Possible Sources

Action

The 4x4 HIGH does not engage at speed correctly
(driveline does not synchronize correctly) but does
engage at rest

z

MSOF switch.

z

MSOF electric
clutch relay.

z

MSOF transfer case
electric clutch.

z

Circuitry.

z

MSOF transfer case
clutch armature.

z

GEM.

GO to PINPOINT

TEST G .

The front axle is not engaging correctly (transfer case
motor movement OK)

z

GEM.

z

4x4 solenoid.

z

4x2 solenoid.

z

Circuitry.

GO to PINPOINT

TEST H .

The 4x4 LOW range indicator does not operate correctly

z

Fuse(s).

z

Circuitry.

z

MSOF switch.

z

Digital TR sensor.

z

PCM.

GO to PINPOINT

TEST J .

No communication with the module - GEM

z

GEM.

z

Fuse(s).

z

Circuitry.

GO to PINPOINT

TEST K .

2003 Ford Pickup F150

2003 TRANSMISSIONS Transfer Case - General Information - F150 Pickup

Fig. 78: Pinpoint Test G: 4X4 High Does Not Engage At Speed Correctly (Driveline Does Not
Synchronize Correctly) But Does Engage At Rest (Steps G1-G4)
Courtesy of FORD MOTOR CO.

2003 Ford Pickup F150

2003 TRANSMISSIONS Transfer Case - General Information - F150 Pickup

Fig. 79: Pinpoint Test G: 4X4 High Does Not Engage At Speed Correctly (Driveline Does Not
Synchronize Correctly) But Does Engage At Rest (Steps G5-G6)
Courtesy of FORD MOTOR CO.

2003 Ford Pickup F150

2003 TRANSMISSIONS Transfer Case - General Information - F150 Pickup