TEST
ACTION
APPLICABILITY
5
Disconnect the Brake Lamp Switch harness connector.
Turn the ignition on.
While monitoring the SEC BRAKE SWITCH status with the DRB, connect a jumper
wire between ground and the Secondary Brake Switch Signal circuit.
Does the DRB display change from PRESSED to RELEASED?
All
Yes
→ Adjust or replace the Brake Lamp Switch in accordance with the
Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→ Go To 6
6
Turn the ignition off.
Disconnect the Brake Lamp Switch harness connector.
Measure the resistance between ground and the Secondary Brake Switch Ground
circuit.
Is the resistance below 10.0 ohms?
All
Yes
→ Go To 7
No
→ Repair the Secondary Brake Switch Ground circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
7
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
8
Turn the ignition off.
Disconnect the Brake Lamp Switch harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Secondary Brake Switch Signal
circuit.
Is the resistance above 1000 ohms?
All
Yes
→ Go To 9
No
→ Repair the Secondary Brake Switch Signal circuit for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
9
Turn the ignition off.
Disconnect the Brake Lamp Switch harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Secondary Brake Switch Signal circuit.
Is the resistance below 10.0 ohms?
All
Yes
→ Go To 10
No
→ Repair the Secondary Brake Switch Signal circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
10
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
160
DRIVEABILITY - DIESEL
P0703-BRAKE SWITCH SIGNAL CIRCUITS PLAUSIBILITY WITH RE-
DUNDANT CONTACT —
Continued