Test Description
The numbers below refer to the step numbers on the diagnostic table.
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Listen for an audible click when the PERIM LP relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
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Tests for voltage at the control side of the PERIM LP relay.
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Verifies that the control module is providing ground to the PERIM LP relay.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Did the backup lamps operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
Does the PERIM LP relay turn ON and OFF with each command? | Go to Step 6 | Go to Step 4 | |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 14 | |
Does the test lamp turn ON and OFF with each command? | Go to Step 12 | Go to Step 9 | |
6 | At the PERIM LP relay, probe the PERIM LP relay switched supply voltage circuit with a test lamp that is connected to ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 15 |
7 | Connect a 10-amp fused jumper between the PERIM LP relay switched supply voltage circuit and the B/U LP fuse supply voltage circuit. Do the backup lamps illuminate? | Go to Step 12 | Go to Step 8 |
8 |
Does the test lamp illuminate? | Go to Step 11 | Go to Step 10 |
9 | Test the PERIM LP relay exterior courtesy lamps relay control circuit for an open circuit or a short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 13 |
10 | Test the backup lamp supply voltage circuit for a high resistance, short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 16 |
11 | Inspect for poor connections at the backup lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 17 |
12 | Inspect for poor connections at the PERIM LP relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 18 |
13 | Inspect for poor connections at the harness connector of the remote control door lock receiver module (RCDLR). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 19 |
14 | Replace the fuse block-I/P. Refer to Instrument Panel Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 20 | -- |
15 | Repair the open in the PERIM LP relay switched supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
16 | Repair the open circuit in the backup lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
17 | Replace the backup lamp bulb. Did you complete the replacement? | Go to Step 20 | -- |
18 | Replace the PERIM LP relay. Refer to Relay Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 20 | -- |
19 | Replace the RCDLR module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
