Ranger 2WD V6-3.0L (2008)
Daytime Running Lamp: Pinpoint Tests
Test W: The Daytime Running Lamps (DRL) Are Inoperative
PINPOINT TEST W: THE DAYTIME RUNNING LAMPS (DRL) ARE INOPERATIVE
NOTE: When an excessive circuit load occurs several times, the module shuts down the output until a service procedure is carried out. At the same
time, the continuous DTC that was stored on the first failure cannot be cleared by a command to clear the continuous DTCs. The module does not allow
this code to be cleared or the circuit restored to normal until a successful on-demand self-test proves that the fault has been repaired. After the
on-demand self-test has successfully completed (no on-demand DTCs present), the continuous DTC clears and the circuit function returns.
Normal Operation
The DRL are controlled by the smart junction box (SJB). The SJB operates the low beam headlamps at a reduced intensity. The DRL driver (integral
to the SJB) supplies pulse-width modulated (PWM) voltage to the low beam headlamps.
This pinpoint test is intended to diagnose the following:
-
Headlamp bulbs
-
SJB
W1-W3
Test X: DTC U0155 - Lost Communication With Instrument Panel Cluster (IC) Control Module
PINPOINT TEST X: DTC U0155 - LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IC) CONTROL MODULE
Normal Operation
The smart junction box (SJB) sets DTC U0155 if data messages received from the instrument cluster (IC) over the high speed controller area network
(HS-CAN) are missing. For a complete list of all network messages, refer to Information Bus (Module Communications Network).
This pinpoint test is intended to diagnose the following:
-
Communication network
-
Instrument cluster (IC)
