[HUMTECH]

Rearview Camera System Does Not Display

1. <LI type=1>Ignition OFF, disconnect the harness connector at the rearview camera. <LI type=1>Test for less than 10 Ω between the ground circuit terminal D and ground.
   ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
   <LI type=1>Ignition ON, verify a test lamp illuminates between the ignition circuit terminal C and ground.
   ⇒If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance.
   <LI type=1>Park brake applied, transmission in REVERSE, test for B+ between the B+ circuit terminal F and ground.
   ⇒If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
   <LI type=1>Ignition OFF, disconnect the X4 harness connector at the radio. <LI type=1>Ignition ON, test for less than 1 V between the following signal circuit terminals at the rearview camera harness connector and ground:
   ? Signal (+) circuit terminal A
   ? Signal (-) circuit terminal B
   ⇒If greater than the specified range, test the signal circuit for a short to voltage.
   <LI type=1>Test for infinite resistance between the following circuit terminals at the rearview camera harness connector and ground:
   ? Signal (+) circuit terminal A
   ? Signal (-) circuit terminal B
   ⇒If not the specified value, test the circuit for a short to ground.
   <LI type=1>Test for less than 10 Ω between the shield ground circuit terminal E and ground.
   ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
   <LI type=1>Test for less than 2 Ω between the signal (+) circuit terminal A at the rearview camera harness connector and the signal (+) circuit terminal 6 at the radio harness connector
   ⇒If greater than the specified range, test the signal circuit for an open/high resistance.
   <LI type=1>Test for less than 2 Ω between the signal (-) circuit terminal B at the rearview camera harness connector and the signal (-) circuit terminal 7 at the radio harness connector.
   ⇒If greater than the specified range, test the signal circuit for an open/high resistance.
   <LI type=1>If all circuits test normal, test or replace the rearview camera.
2. Ignition ON, transmission in REVERSE, verify a clear rear vision image is displayed on the radio.
   ⇒If a clear rear vision image is not displayed, replace the radio.